U.S. patent application number 16/493744 was filed with the patent office on 2021-07-15 for insulation coordination method and system for a series compensation apparatus, storage medium and electronic device.
This patent application is currently assigned to GLOBAL ENERGY INTERCONNECTION RESEARCH INSTITUTE CO., LTD.. The applicant listed for this patent is GLOBAL ENERGY INTERCONNECTION RESEARCH INSTITUTE CO., LTD., STATE GRID CORPORATION OF CHINA. Invention is credited to Linhai Cai, Jing Ge, Haijun Liu, Zhengang Lu, Guoliang Zhao.
Application Number | 20210216698 16/493744 |
Document ID | / |
Family ID | 1000005679019 |
Filed Date | 2021-07-15 |
United States Patent
Application |
20210216698 |
Kind Code |
A1 |
Ge; Jing ; et al. |
July 15, 2021 |
INSULATION COORDINATION METHOD AND SYSTEM FOR A SERIES COMPENSATION
APPARATUS, STORAGE MEDIUM AND ELECTRONIC DEVICE
Abstract
Provided are an insulation coordination method and system for a
series compensation apparatus, a storage medium and an electronic
device. The method includes determining a topology of a series
compensation apparatus and a system parameter and an operation mode
of an access system of the series compensation apparatus;
performing overvoltage partitioning on the series compensation
apparatus; constructing a simulated operating condition according
to a plurality of overvoltage analysis areas and an operating
condition; establishing an overvoltage simulation analysis model;
performing a simulating calculation for different preset fault
types according to the overvoltage simulation analysis model;
determining the number of lightning arresters installed in each
overvoltage analysis area and a continuous operating voltage value
of each lightning arrester; and determining, according to a preset
insulation coordination coefficient and the continuous operating
voltage value of each lightning arrester, a safe operating voltage
of the series compensation apparatus.
Inventors: |
Ge; Jing; (Beijing, CN)
; Lu; Zhengang; (Beijing, CN) ; Zhao;
Guoliang; (Beijing, CN) ; Cai; Linhai;
(Beijing, CN) ; Liu; Haijun; (Beijing,
CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
GLOBAL ENERGY INTERCONNECTION RESEARCH INSTITUTE CO., LTD.
STATE GRID CORPORATION OF CHINA |
Beijing
Beijing |
|
CN
CN |
|
|
Assignee: |
GLOBAL ENERGY INTERCONNECTION
RESEARCH INSTITUTE CO., LTD.
Beijing
CN
STATE GRID CORPORATION OF CHINA
Beijing
CN
|
Family ID: |
1000005679019 |
Appl. No.: |
16/493744 |
Filed: |
July 25, 2019 |
PCT Filed: |
July 25, 2019 |
PCT NO: |
PCT/CN2019/097645 |
371 Date: |
September 12, 2019 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
G06F 2119/02 20200101;
H02J 3/12 20130101; G06F 30/398 20200101 |
International
Class: |
G06F 30/398 20060101
G06F030/398; H02J 3/12 20060101 H02J003/12 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 21, 2018 |
CN |
201811105474.7 |
Claims
1. An insulation coordination method for a series compensation
apparatus, comprising: determining a topology of a series
compensation apparatus to be tested and a system parameter and an
operation mode of an access system of the series compensation
apparatus to be tested; performing, according to the topology, the
system parameter and the operation mode, overvoltage partitioning
on the series compensation apparatus to be tested to obtain a
plurality of overvoltage analysis areas; constructing a simulated
operating condition of the series compensation apparatus to be
tested according to the plurality of overvoltage analysis areas and
an operating condition of the series compensation apparatus to be
tested; establishing, according to the simulated operating
condition, an overvoltage simulation analysis model for the series
compensation apparatus to be tested; in each of the plurality of
overvoltage analysis areas, performing a simulating calculation for
different preset fault types according to the overvoltage
simulation analysis model to obtain a simulating calculation
result; determining, according to a preset lightning arrester
configuration principle and the simulating calculation result, a
number of lightning arresters installed in each of the plurality of
overvoltage analysis areas and a continuous operating voltage value
of each lightning arrester; and determining, according to a preset
insulation coordination coefficient and the continuous operating
voltage value of each lightning arrester, a safe operating voltage
of the series compensation apparatus to be tested.
2. The method of claim 1, wherein the plurality of overvoltage
analysis areas comprise a series transformer grid side area, a
series transformer valve side area, a balancing winding area and a
converter valve area.
3. The method of claim 1, wherein in each of the plurality of
overvoltage analysis areas, performing a simulating calculation for
different preset fault types according to the overvoltage
simulation analysis model to obtain the simulating calculation
result comprises: performing a simulating calculation according to
the overvoltage simulation analysis model to obtain a maximum
steady-state operating voltage of the series compensation apparatus
to be tested; performing a simulating calculation according to the
overvoltage simulation analysis model to obtain overvoltage values
of the different preset fault types for each device in the series
compensation apparatus to be tested; and generating the simulating
calculation result according to the maximum steady-state operating
voltage and the overvoltage values.
4. The method of claim 1, wherein determining, according to the
preset lightning arrester configuration principle and the
simulating calculation result, the number of the lightning
arresters installed in each of the plurality of overvoltage
analysis areas and the continuous operating voltage value of each
lightning arrester comprises: determining, according to the preset
lightning arrester configuration principle and the simulating
calculation result, an arrester installation position and a basic
parameter in each of the plurality of overvoltage analysis areas;
determining, according to the arrester installation position, the
number of the lightning arresters; acquiring an operating
requirement of each lightning arrester at the arrester installation
position based on the basic parameter, and obtaining the continuous
operating voltage value of each lightning arrester according to the
operating requirement; and determining, according to the continuous
operating voltage value and the overvoltage simulation analysis
model, a number of valve discs to be installed for each lighting
arrester.
5. The method of claim 4, wherein acquiring the operating
requirement of each lightning arrester at the arrester installation
position based on the basic parameter, and obtaining the continuous
operating voltage value of each lightning arrester according to the
operating requirement comprises: determining, according to the
operating requirement of each lightning arrester at the arrester
installation position, a chargeability and a valve disc model of
each lightning arrester; counting, according to the chargeability
and a valve disc file corresponding to the valve disc model of each
lightning arrester, feature values of each lighting arrester; and
selecting the continuous operating voltage value corresponding to
the valve disc model from the feature values of each lightning
arrester according to the valve disc model of each lightning
arrester.
6. The method of claim 5, wherein the feature values comprise a
rated continuous operating voltage, a continuous operating voltage
peak, and a reference voltage.
7. The method of claim 4, wherein determining, according to the
continuous operating voltage value and the overvoltage simulation
analysis model, the number of valve discs to be installed for each
lighting arrester comprises: performing an energy simulating
calculation on each lightning arrester according to the overvoltage
simulation analysis model to obtain maximum received energy of each
lightning arrester; and determining, according to the maximum
received energy of each lighting arrester, the number of valve
discs to be installed of each lighting arrester.
8. (canceled)
9. A non-transient computer-readable storage medium, configured to
store computer instructions for implementing an insulation
coordination method for a series compensation apparatus when the
computer instructions are executed by a processor, wherein the
insulation coordination method comprises: determining a topology of
the series compensation apparatus and a system parameter and an
operation mode of an access system of the series compensation
apparatus; performing, according to the topology, the system
parameter and the operation mode, overvoltage partitioning on the
series compensation apparatus to obtain a plurality of overvoltage
analysis areas; constructing a simulated operating condition of the
series compensation apparatus according to the plurality of
overvoltage analysis areas and an operating condition of the series
compensation apparatus; establishing, according to the simulated
operating condition, an overvoltage simulation analysis model for
the series compensation apparatus; in each of the plurality of
overvoltage analysis areas, performing a simulating calculation for
different preset fault types according to the overvoltage
simulation analysis model to obtain a simulating calculation
result; determining, according to a preset lightning arrester
configuration principle and the simulating calculation result, a
number of lightning arresters installed in each of the plurality of
overvoltage analysis areas and a continuous operating voltage value
of each lightning arrester; and determining, according to a preset
insulation coordination coefficient and the continuous operating
voltage value of each lightning arrester, a safe operating voltage
of the series compensation apparatus.
10. An electronic device, comprising: at least one processor; and a
memory communicably connected to the at least one processor,
wherein the memory stores instructions executable by the at least
one processor, which, when executed by the at least one processor,
enable the at least one processor to execute an insulation
coordination method for a series compensation apparatus, wherein
the insulation coordination method comprises: determining a
topology of the series compensation apparatus and a system
parameter and an operation mode of an access system of the series
compensation apparatus; performing, according to the topology, the
system parameter and the operation mode, overvoltage partitioning
on the series compensation apparatus to obtain a plurality of
overvoltage analysis areas; constructing a simulated operating
condition of the series compensation apparatus according to the
plurality of overvoltage analysis areas and an operating condition
of the series compensation apparatus; establishing, according to
the simulated operating condition, an overvoltage simulation
analysis model for the series compensation apparatus; in each of
the plurality of overvoltage analysis areas, performing a
simulating calculation for different preset fault types according
to the overvoltage simulation analysis model to obtain a simulating
calculation result; determining, according to a preset lightning
arrester configuration principle and the simulating calculation
result, a number of lightning arresters installed in each of the
plurality of overvoltage analysis areas and a continuous operating
voltage value of each lightning arrester; and determining,
according to a preset insulation coordination coefficient and the
continuous operating voltage value of each lightning arrester, a
safe operating voltage of the series compensation apparatus.
11. The storage medium of claim 9, wherein the plurality of
overvoltage analysis areas comprise a series transformer grid side
area, a series transformer valve side area, a balancing winding
area and a converter valve area.
12. The storage medium of claim 9, wherein in each of the plurality
of overvoltage analysis areas, performing a simulating calculation
for different preset fault types according to the overvoltage
simulation analysis model to obtain the simulating calculation
result comprises: performing a simulating calculation according to
the overvoltage simulation analysis model to obtain a maximum
steady-state operating voltage of the series compensation
apparatus; performing a simulating calculation according to the
overvoltage simulation analysis model to obtain overvoltage values
of the different preset fault types for each device in the series
compensation apparatus; and generating the simulating calculation
result according to the maximum steady-state operating voltage and
the overvoltage values.
13. The storage medium of claim 9, wherein determining, according
to the preset lightning arrester configuration principle and the
simulating calculation result, the number of the lightning
arresters installed in each of the plurality of overvoltage
analysis areas and the continuous operating voltage value of each
lightning arrester comprises: determining, according to the preset
lightning arrester configuration principle and the simulating
calculation result, one or more arrester installation positions and
a basic parameter in each of the plurality of overvoltage analysis
areas; determining, according to the one or more arrester
installation positions, the number of the lightning arresters in
each of the plurality of overvoltage analysis areas; acquiring an
operating requirement of each lightning arrester at its arrester
installation position based on the basic parameter, and obtaining
the continuous operating voltage value of each lightning arrester
according to the operating requirement; and determining, according
to the continuous operating voltage value and the overvoltage
simulation analysis model, a number of valve discs to be installed
for each lighting arrester.
14. The storage medium of claim 13, wherein acquiring the operating
requirement of each lightning arrester at its arrester installation
position based on the basic parameter, and obtaining the continuous
operating voltage value of each lightning arrester according to the
operating requirement comprises: determining, according to the
operating requirement of each lightning arrester at its arrester
installation position, a chargeability and a valve disc model of
each lightning arrester; counting, according to the chargeability
and a valve disc file corresponding to the valve disc model of each
lightning arrester, feature values of each lighting arrester; and
selecting the continuous operating voltage value corresponding to
the valve disc model from the feature values of each lightning
arrester according to the valve disc model of each lightning
arrester.
15. The storage medium of claim 14, wherein the feature values
comprise a rated continuous operating voltage, a continuous
operating voltage peak, and a reference voltage.
16. The storage medium of claim 13, wherein determining, according
to the continuous operating voltage value and the overvoltage
simulation analysis model, the number of valve discs to be
installed for each lighting arrester comprises: performing an
energy simulating calculation on each lightning arrester according
to the overvoltage simulation analysis model to obtain maximum
received energy of each lightning arrester; and determining,
according to the maximum received energy of each lighting arrester,
the number of valve discs to be installed of each lighting
arrester.
17. The electronic device of claim 10, wherein the plurality of
overvoltage analysis areas comprise a series transformer grid side
area, a series transformer valve side area, a balancing winding
area and a converter valve area.
18. The electronic device of claim 10, wherein in each of the
plurality of overvoltage analysis areas, performing a simulating
calculation for different preset fault types according to the
overvoltage simulation analysis model to obtain the simulating
calculation result comprises: performing a simulating calculation
according to the overvoltage simulation analysis model to obtain a
maximum steady-state operating voltage of the series compensation
apparatus; performing a simulating calculation according to the
overvoltage simulation analysis model to obtain overvoltage values
of the different preset fault types for each device in the series
compensation apparatus; and generating the simulating calculation
result according to the maximum steady-state operating voltage and
the overvoltage values.
19. The electronic device of claim 10, wherein determining,
according to the preset lightning arrester configuration principle
and the simulating calculation result, the number of the lightning
arresters installed in each of the plurality of overvoltage
analysis areas and the continuous operating voltage value of each
lightning arrester comprises: determining, according to the preset
lightning arrester configuration principle and the simulating
calculation result, one or more arrester installation positions and
a basic parameter in each of the plurality of overvoltage analysis
areas; determining, according to the one or more arrester
installation positions, the number of the lightning arresters in
each of the plurality of overvoltage analysis areas; acquiring an
operating requirement of each lightning arrester at its arrester
installation position based on the basic parameter, and obtaining
the continuous operating voltage value of each lightning arrester
according to the operating requirement; and determining, according
to the continuous operating voltage value and the overvoltage
simulation analysis model, a number of valve discs to be installed
for each lighting arrester.
20. The electronic device of claim 19, wherein acquiring the
operating requirement of each lightning arrester at its arrester
installation position based on the basic parameter, and obtaining
the continuous operating voltage value of each lightning arrester
according to the operating requirement comprises: determining,
according to the operating requirement of each lightning arrester
at its arrester installation position, a chargeability and a valve
disc model of each lightning arrester; counting, according to the
chargeability and a valve disc file corresponding to the valve disc
model of each lightning arrester, feature values of each lighting
arrester; and selecting the continuous operating voltage value
corresponding to the valve disc model from the feature values of
each lightning arrester according to the valve disc model of each
lightning arrester.
21. The electronic device of claim 19, wherein determining,
according to the continuous operating voltage value and the
overvoltage simulation analysis model, the number of valve discs to
be installed for each lighting arrester comprises: performing an
energy simulating calculation on each lightning arrester according
to the overvoltage simulation analysis model to obtain maximum
received energy of each lightning arrester; and determining,
according to the maximum received energy of each lighting arrester,
the number of valve discs to be installed of each lighting
arrester.
Description
[0001] The present application claims priority to a Chinese patent
application No. 201811105474.7 filed on Sep. 21, 2018, the content
of which is incorporated herein by reference in its entirety.
TECHNICAL FIELD
[0002] The present application relates to the field of series
compensation technologies, for example, to an insulation
coordination method and system for a series compensation apparatus,
a storage medium and an electronic device.
BACKGROUND
[0003] The development of national economy imposes an increasing
demand for electric energy and higher and higher requirements on a
power transmission capacity of a power grid. However, limited by
environmental impact assessment and high manufacturing costs, the
deployment of a new high-voltage power transmission line cannot
satisfy the increasing demand for electric energy; therefore, the
burden on the existing transmission line is increased and the
problem of an insufficient power transmission capacity is
increasingly highlighted.
[0004] By use of the latest developments and achievements of power
electronic technologies and modern control technologies, a series
compensation apparatus performs flexible, quick and accurate
control on parameters of an alternating current transmission
system. The series compensation apparatus can implement the
reasonable distribution of transmission power, reduce power losses,
and significantly improve the transmission capacity of the
transmission line and the stability and reliability of a power
system, and is an important means for the safety, economy and
comprehensive control of the power system and plays an important
role in fully utilizing power grid resources and achieving the
high-efficiency utilization of electric energy.
[0005] Since the series compensation apparatus has many elements
and relatively complex operating conditions, when the series
compensation apparatus is operated in the power grid, various
faults or abnormal conditions may occur, for example, a
through-line fault current, a overvoltage which is multiple times
the series voltage or even higher. The overvoltage in a device or
the system damages the apparatus and threatens the stability of the
system. Therefore, an insulation coordination method for the series
compensation apparatus is particularly important. However, the
insulation coordination method in the related art ignores the
influence of system-side faults on the series compensation
apparatus and the alternating current system. The lightning
arrester configuration protection mode is limited and is difficult
to solve various fault types, and the reliability of the system
needs to be improved.
SUMMARY
[0006] Embodiments of the present application provide an insulation
coordination method and system for a series compensation apparatus,
a storage medium and an electronic device, to solve the problem in
the related art that the insulation coordination method ignores
influence of the system-side faults on the series compensation
apparatus, and the lightning arrester configuration protection mode
is limited and has low reliability, and is difficult to adapt to
various fault types.
[0007] An embodiment of the present application provides an
insulation coordination method for a series compensation apparatus.
The method includes the following steps. A topology of a series
compensation apparatus to be tested and a system parameter and an
operation mode of an access system of the series compensation
apparatus to be tested are determined. Overvoltage partitioning is
performed on the series compensation apparatus to be tested
according to the topology, the system parameter and the operation
mode to obtain a plurality of overvoltage analysis areas. A
simulated operating condition of the series compensation apparatus
to be tested is constructed according to the plurality of
overvoltage analysis areas and an operating condition of the series
compensation apparatus to be tested. An overvoltage simulation
analysis model is established, according to the simulated operating
condition, for the series compensation apparatus to be tested. In
each of the plurality of overvoltage analysis areas, a simulating
calculation is performed for different preset fault types according
to the overvoltage simulation analysis model to obtain a simulating
calculation result. The number of lightning arresters installed in
each of the plurality of overvoltage analysis areas and a
continuous operating voltage of each lightning arrester are
determined according to a preset lightning arrester configuration
principle and the simulating calculation result; and a safe
operating voltage of the series compensation apparatus to be tested
is determined according to a preset insulation coordination
coefficient and the continuous operating voltage value of each
lightning arrester.
[0008] An embodiment of the present application provides an
insulation coordination system for a series compensation apparatus.
The system includes an information determination module, an
overvoltage partitioning module, a simulated operating condition
determination module, a system overvoltage simulation analysis
model construction module, a simulation and calculation module, a
lighting arrester parameter determination module and a safe
operating voltage determination module. The information
determination module is configured to determine a topology of a
series compensation apparatus to be tested and a system parameter
and an operation mode of an access system of the series
compensation apparatus to be tested. The overvoltage partitioning
module is configured to perform, according to the topology, the
system parameter and the operation mode, overvoltage partitioning
on the series compensation apparatus to be tested to obtain a
plurality of overvoltage analysis areas. The simulated operating
condition determination module is configured to construct a
simulated operating condition of the series compensation apparatus
to be tested according to the plurality of overvoltage analysis
areas and an operating condition of the series compensation
apparatus to be tested. The system overvoltage simulation analysis
model construction module is configured to establish, according to
the simulated operating condition, an overvoltage simulation
analysis model for the series compensation apparatus to be tested.
The simulation and calculation module is configured to perform, in
each of the plurality of overvoltage analysis areas, a simulating
calculation for different preset fault types according to the
overvoltage simulation analysis model to obtain a simulating
calculation result. The lighting arrester parameter determination
module is configured to determine, according to a preset lightning
arrester configuration principle and the simulating calculation
result, the number of lightning arresters installed in each of the
plurality of overvoltage analysis areas and a continuous operating
voltage value of each lightning arrester. The safe operating
voltage determination module is configured to determine, according
to a preset insulation coordination coefficient and the continuous
operating voltage value of each lightning arrester, a safe
operating voltage of the series compensation apparatus to be
tested.
[0009] An embodiment of the present application provides a
non-transient computer-readable storage medium. The non-transient
computer-readable storage medium is configured to store computer
instructions for enabling a computer to execute the method in the
embodiment described above.
[0010] An embodiment of the present application provides a computer
program product including a computer program stored on a
non-transient computer-readable storage medium. The computer
program includes program instructions that, when executed by a
computer, enable the computer to execute the method in the
embodiment described above.
BRIEF DESCRIPTION OF DRAWINGS
[0011] FIG. 1 is a flowchart of an insulation coordination method
for a series compensation apparatus according to an embodiment of
the present application;
[0012] FIG. 2 is a schematic diagram of a circuit structure of a
series compensation apparatus according to an embodiment of the
present application;
[0013] FIG. 3 is a structural diagram of a lighting arrester
configuration for a series compensation apparatus according to an
embodiment of the present application;
[0014] FIG. 4 is a flowchart of another insulation coordination
method for a series compensation apparatus according to an
embodiment of the present application;
[0015] FIG. 5 is a flowchart of yet another insulation coordination
method for a series compensation apparatus according to an
embodiment of the present application;
[0016] FIG. 6 is a structural diagram of an insulation coordination
system for a series compensation apparatus according to an
embodiment of the present application; and
[0017] FIG. 7 is a structural diagram of an electronic device
according to an embodiment of the present application.
DETAILED DESCRIPTION
[0018] Solutions in the present application will be described below
in detail in conjunction with the drawings. The embodiments
described below are part, not all of the embodiments of the present
application.
[0019] In addition, if not in conflict, technical features involved
in different embodiments described below of the present application
may be combined with each other.
Embodiment 1
[0020] An embodiment of the present application provides an
insulation coordination method for a series compensation apparatus.
As shown in FIG. 1, the method includes steps S110 to S170.
[0021] In S110, a topology of a series compensation apparatus to be
tested and a system parameter and an operation mode of an access
system of the series compensation apparatus to be tested are
determined.
[0022] In S120, according to the topology, the system parameter and
the operation mode, overvoltage partitioning is performed on the
series compensation apparatus to be tested to obtain a plurality of
overvoltage analysis areas.
[0023] In S130, a simulated operating condition of the series
compensation apparatus to be tested is constructed according to the
plurality of overvoltage analysis areas and an operating condition
of the series compensation apparatus to be tested.
[0024] In S140, an overvoltage simulation analysis model is
established, according to the simulated operating condition, for
the series compensation apparatus to be tested.
[0025] In S150, in each of the plurality of overvoltage analysis
areas, a simulating calculation is performed for different preset
fault types according to the overvoltage simulation analysis model
to obtain a simulating calculation result.
[0026] In S160, the number of lightning arresters to be installed
in each of the plurality of overvoltage analysis areas and a
continuous operating voltage value of each lightning arrester are
determined according to a preset lightning arrester configuration
principle and the simulating calculation result.
[0027] In S170, a safe operating voltage of the series compensation
apparatus to be tested is determined according to a preset
insulation coordination coefficient and the continuous operating
voltage value of each lightning arrester.
[0028] Through the cooperation of steps S110 to S170, the
insulation coordination method for the series compensation
apparatus provided by the embodiment of the present application
accurately calculates overvoltage values of various devices in the
series compensation apparatus, determines a lightning arrester
configuration scheme, and further determines the safe operating
voltage of the series compensation apparatus to be tested, so that
the series compensation apparatus can safely operate under various
fault types, thereby improving stability and reliability of an
entire power transmission system. The insulation coordination
method for the series compensation apparatus has a wide application
range and a high practical engineering application value.
[0029] The insulation coordination method for the series
compensation apparatus provided by the embodiment of the present
application will be described below in conjunction with
examples.
[0030] In an embodiment, in S110, the topology of the series
compensation apparatus to be tested and the system parameter and
the operation mode of the access system of the series compensation
apparatus to be tested are determined. FIG. 2 is a structural
diagram of a main circuit of the series compensation apparatus. As
shown in FIG. 2, the main circuit of the series compensation
apparatus includes: a series transformer, a system-side bypass
breaker, a disconnector, a bypass thyristor, a reactor (such as a
dry reactor), a valve-side bypass breaker, a converter valve, and
an alternating current lead. The series compensation apparatus is
connected in series with a transmission line and generates a
voltage having a controllable amplitude, where a phase of the
voltage is orthogonal to a phase of the current of the transmission
line. By controlling the output voltage of the series compensation
apparatus, an equivalent impedance of the transmission line to
which the series compensation apparatus is connected in series may
be changed, so that active power and reactive power transmitted by
the transmission line are regulated, and power oscillation is
damped, subsynchronous oscillation is inhibited, transient
stability is improved, and so on. In an embodiment, the circuit
structure is used for calculating the overvoltage values of the
various devices in the series compensation apparatus in the
embodiment of the present application. In practical applications,
other circuit structures may be used, which are not limited in the
present application.
[0031] In an embodiment, the lightning arrester configuration
scheme of the series compensation apparatus is shown in FIG. 3. The
lightning arresters configured for the series compensation
apparatus include: a lightning arrester for the line, a lightning
arrester connected across a grid side winding of the series
transformer, a lightning arrester on valve side of the series
transformer, a lightning arrester for a balancing winding the
series transformer, a lightning arrester at a bottom of a series
converter valve and the like. In an embodiment, a metal oxide
arrester MOA0 is the lightning arrester for the line and is
configured to prevent a lightning overvoltage. A metal oxide
arrester MOA1 is the lightning arrester connected across the grid
side winding of the series transformer and configured to protect
turn-to-turn insulation of the winding on the grid side of the
series transformer, and is connected across the winding on the grid
side. A metal oxide arrester MOA2 is the lightning arrester on the
valve side of the series transformer and configured to prevent a
winding on the valve side of the series transformer from
overvoltage and protect the turn-to-turn insulation of the
connection between the reactor and the converter. This lightning
arrester is installed on the valve side of the series transformer.
The metal oxide arrester MOA3/MOA4 are the lightning arresters for
the balancing winding of the series transformer, and are configured
to prevent the balancing winding of the series transformer from the
overvoltage and protect the insulation of the balancing winding.
The lightning arresters are installed at the balancing winding of
the series transformer. The metal oxide arrester MOA5 is the
lightning arrester at the bottom of the series converter valve and
is configured to prevent the overvoltage between ends of the
converter valve and directly protect the ends of the converter
valve and devices at the ends of the converter valve. This
lightning arrester is installed between the ends of the converter
valve.
[0032] In an embodiment, in S120, according to the topology, the
system parameter and the operation mode, the overvoltage
partitioning is performed on the series compensation apparatus to
be tested, and the plurality of overvoltage analysis areas are
obtained. In an embodiment, as shown in FIG. 2, the possible
overvoltage in the series compensation apparatus includes multiple
types, such as a lighting overvoltage on line side (grid side), an
operating overvoltage, a temporary overvoltage, an internal power
frequency overvoltage of the series compensation apparatus to be
tested. Therefore, the series compensation apparatus to be tested
is partitioned, according to operation modes of different devices,
into the plurality of overvoltage analysis areas including a series
transformer grid side area, a series transformer valve side area, a
balance winding area and a converter valve area.
[0033] In an embodiment, in S130, the simulated operating condition
of the series compensation apparatus to be tested is constructed
according to the plurality of overvoltage analysis areas and the
operating condition of the series compensation apparatus to be
tested. In practical applications, the operating condition of the
series compensation apparatus to be tested includes a saturation
situation of a transformer, a setting value of the bypass
thyristor, a setting value of a module distributed bypass, a
grounding mode, a maximum operation mode and the like.
[0034] In an embodiment, in S140, the overvoltage simulation
analysis model is established according to the simulation state for
the series compensation apparatus to be tested. In practical
applications, the overvoltage simulation analysis model of the
series compensation apparatus to be tested may be established on a
simulation platform provided by a Real Time Digital Simulator
(RTDS). An equivalent overvoltage simulation analysis model of the
series compensation apparatus to be tested is established on the
simulation platform of the RTDS by converting the system parameter
of the access system of the series compensation apparatus to be
tested into an equivalent parameter, and converting the saturation
situation of the transformer, the setting value of the bypass
thyristor, the setting value of the module distributed bypass, the
grounding mode, the maximum operation mode and the like of the
series compensation apparatus to be tested into corresponding
parameters.
[0035] In an embodiment, as shown in FIG. 4, the step S150 in which
in each overvoltage analysis area, the simulating calculation is
performed for different preset fault types according to the
overvoltage simulation analysis model to obtain the simulating
calculation result includes steps S510 to S530.
[0036] In S510, the simulating calculation is performed according
to the overvoltage simulation analysis model to obtain a maximum
steady-state operating voltage of the series compensation apparatus
to be tested. In practical applications, the maximum steady-state
operating voltage is a maximum access voltage under which the
series compensation apparatus to be tested can safely and stably
operate. When an actual access voltage value exceeds the maximum
steady-state operating voltage, the series compensation apparatus
to be tested has fault hazards. Therefore, in practical work, it is
necessary to ensure that the access voltage value of the series
compensation apparatus is lower than the maximum steady-state
operating voltage.
[0037] In S520, the simulating calculation is performed according
to the overvoltage simulation analysis model to obtain overvoltage
values of the different preset fault types for each device in the
series transformer grid side area, the series transformer valve
side area, the balancing winding area and the converter valve area
of the series compensation apparatus to be tested overvoltage
values. In practical applications, the preset fault types include:
a fault of the access system of the series compensation apparatus
to be tested, a fault of an adjacent transmission line, each device
in the series compensation apparatus to be tested may have multiple
types of faults, and the like.
[0038] In S530, the simulating calculation result is generated
according to the maximum steady-state operating voltage and the
overvoltage values. In practical applications, the simulating
calculation result includes the maximum steady-state operating
voltage of the series compensation apparatus to be tested and the
overvoltage values of different devices in the overvoltage analysis
areas under the different preset fault types.
[0039] In an embodiment, as shown in FIG. 4, the step S160 in which
the number of lightning arresters installed in each of the
plurality of overvoltage analysis areas and the continuous
operating voltage value of each lightning arrester are determined
according to the preset lightning arrester configuration principle
and the simulating calculation result includes steps S610 to
S630.
[0040] In S610, arrester installation positions and a basic
parameter in each of the plurality of overvoltage analysis areas
are determined according to the preset lightning arrester
configuration principle and the simulating calculation result.
[0041] In an embodiment, the preset lightning arrester
configuration principle includes the following guidelines.
Overvoltage generated on an alternating current side is limited by
an alternating-current-side lightning arrester, overvoltage
generated on a direct current side is limited by a
direct-current-side lightning arrester, and the critical device is
protected by a lightning arrester connected to the critical device.
Core devices such as the converter valve need multi-stage
protection under the consideration of both reliability and economy,
and parameter coordination relationship should be fully considered
in multi-level protection. For example, when a fault happens on the
series transformer grid side, a fault-induced overvoltage passes
through the lightning arrester connected across the series
transformer grid side winding, the lightning arrester on the series
transformer valve side, the series converter valve bottom lightning
arrester and sequentially absorbs energy, and the reference
voltages of these lightning arresters are successively higher,
improving the protection to the converter valve. In practical
applications, the arrester installation positions of the lightning
arresters in different overvoltage analysis areas and the basic
parameters such as the reference voltages of the lightning
arresters are determined according to the preset lightning arrester
configuration principle.
[0042] In S620, the number of the lightning arresters is determined
according to the arrester installation positions, an operating
requirement of the lightning arrester at the arrester installation
position is acquired based on the basic parameter, and the
continuous operating voltage value of each lightning arrester is
obtained according to the operating requirement.
[0043] In an embodiment, at each arrester installation position,
one lightning arrester is installed.
[0044] In an embodiment, as shown in FIG. 5, the step S620 in which
the number of the lightning arresters is determined according to
the arrester installation positions, the operating requirement of
the lightning arrester at each arrester installation position is
acquired based on the basic parameter, and the continuous operating
voltage value of each lightning arrester is obtained according to
the operating requirement includes steps S6210 to S6230.
[0045] In S6210, a chargeability and a valve disc model of each
lightning arrester are determined according to the operating
requirement of each lightning arrester at the arrester installation
position. In practical applications, the lightning arresters at
different arrester installation positions protect different devices
in the series compensation apparatus to be tested. Since the
different devices have different permissible overvoltage values,
the chargeability and the valve disc model of the lightning
arrester need to be determined according to the operating
requirement at the arrester installation position.
[0046] In S6220, feature values of each lighting arrester are
counted according to the chargeability and a valve disc file
corresponding to the valve disc model of each lightning arrester.
In an embodiment, the feature values include: a rated continuous
operating voltage, a continuous operating voltage peak, a reference
voltage of the lighting arrester, and the like. In practical
applications, the valve disc file records the rated continuous
operating voltage, the continuous operating voltage peak, the
reference voltage of the lighting arrester, and the like.
[0047] In S6230, the continuous operating voltage value
corresponding to the valve disc model is selected from the feature
values of each lightning arrester according to the valve disc model
of each lightning arrester. Since the chargeability is a ratio of
the continuous operating voltage value of the lightning arrester to
the rated continuous operating voltage of the lightning arrester,
the continuous operating voltage value of the lightning arrester
may be calculated through the feature values counted in S6220
according to the valve disc model.
[0048] In S630, the number of valve discs to be installed in each
lighting arrester is determined according to the continuous
operating voltage value of each lighting arrester and the
overvoltage simulation analysis model.
[0049] In an embodiment, as shown in FIG. 5, the step S630 in which
the number of valve discs to be installed for each lighting
arrester is determined according to the continuous operating
voltage value of each lighting arrester and the overvoltage
simulation analysis model includes steps S6310 and S6320.
[0050] In S6310, an energy simulating calculation is performed for
each lightning arrester according to the overvoltage simulation
analysis model to obtain maximum received energy of each lightning
arrester.
[0051] In an embodiment, the maximum received energy of each
lightning arrester may be understood as the maximum energy that the
lightning arrester needs to withstand.
[0052] In an embodiment, by performing a simulation analysis on the
series compensation apparatus to be tested according to the
overvoltage simulation analysis model, the maximum overvoltage
values under different fault types are determined for each device
in the series compensation apparatus to be tested, and then further
determined is the maximum received energy that the lightning
arrester installed at the corresponding position of each device
needs to withstand for ensuring the safety of the device.
[0053] In practical applications, in the energy simulation
calculation, the maximum energy should be calculated for each
lightning arrester. The following conditions may also be
considered: the fault type when each arrester installation position
is subject to the maximum overvoltage is adopted during the
stimulation; the maximum energy likely to be received by each
lightning arrester is calculated by correctly considering the
protection actions including hardware locking setting value,
deviation and delay, a thyristor bypass switch's contacting
refusal, and the like; the simulation of the series transformer can
use an ideal model and a saturation model, and the calculation of
the maximum energy can use the ideal model; a deviation is taken
into account fora residual voltage of the lightning arrester, the
maximum energy of each lightning arrester is calculated, and
whether the deviation is positive or negative is determined
according to situations; and in the calculation of the energy of
the lightning arrester, other energy release channels are
disconnected. For example, in the calculation of the energy of the
lightning arrester connected across the series transformer grid
side winding, the converter valve and the like are disconnected.
Alternatively, other conditions may be added according to a
practical operating condition.
[0054] In S6320, the number of valve discs to be installed for each
lighting arrester is determined according to the maximum received
energy of each lighting arrester and a certain margin.
[0055] In an embodiment, the margin is a preset value.
[0056] In practical applications, after the maximum received
energies and the continuous operating voltages are determined for
the lightning arresters installed at different positions, the
number of valve discs to be installed at the position can be
obtained to meet the requirement of the maximum received energy of
the lightning arrester and further protect a safe operation of the
series compensation apparatus to be tested.
[0057] In an embodiment, in S170, the safe operating voltage of the
series compensation apparatus to be tested is determined according
to the preset insulation coordination coefficient and the
continuous operating voltage value of each lightning arrester. In
an embodiment, the preset insulation coordination coefficient needs
to be determined based on a comprehensive consideration of safety,
stability and engineering economy of the series compensation
apparatus to be tested. In practical applications, the continuous
operating voltage values of the lightning arresters at different
positions are different. Since the lightning arresters provide
overvoltage protection for the series compensation apparatus, the
safe operating voltage of the series compensation apparatus to be
tested should be within the continuous operating voltage ranges of
all the lightning arresters. In this way, the lightning arresters
can ensure the safe operation of the series compensation apparatus
to be tested. According to practical engineering requirements and
considering a certain voltage margin, the safe operating voltage of
the series compensation apparatus to be tested is obtained by
multiplying a minimum continuous operating voltage value of the
lightning arresters by the preset insulation coordination
coefficient. In an example, the minimum continuous operating
voltage value of the installed lightning arresters is 1000V and the
preset insulation coordination coefficient is 0.85, the safe
operating voltage of the series compensation apparatus to be tested
is 850V, and the series compensation apparatus to be tested can
safely operate at the safe operating voltage.
[0058] The insulation coordination method for the series
compensation apparatus in the embodiment of the present application
accurately calculates the overvoltage value of each device in the
series compensation device, determines the lightning arrester
configuration scheme, and further determines the safe operating
voltage of the series compensation apparatus to be tested, so that
the series compensation apparatus can safely operate under various
types of faults, improving the stability and reliability of the
entire power transmission system. The insulation coordination
method for the series compensation apparatus has a wide application
range and a high practical engineering application value.
Embodiment 2
[0059] The embodiment of the present application provides an
insulation coordination system for a series compensation apparatus.
As shown in FIG. 6, the system includes an information
determination module 1, an overvoltage partitioning module 2, a
simulated operating condition determination module 3, a system
overvoltage simulation analysis model construction module 4, a
simulation and calculation 5, a lighting arrester parameter
determination module 6, and a safe operating voltage determination
module 7.
[0060] The information determination module 1 is configured to
determine a topology of a series compensation apparatus to be
tested and a system parameter and an operation mode of an access
system of the series compensation apparatus to be tested. For
details, reference can be made to the related description of the
step S110 in the embodiment 1.
[0061] The overvoltage partitioning module 2 is configured to
perform, according to the topology, the system parameter and the
operation mode, overvoltage partitioning on the series compensation
apparatus to be tested to obtain a plurality of overvoltage
analysis areas. For details, reference can be made to the related
description of the step S120 in the embodiment 1.
[0062] The simulated operating condition determination module 3 is
configured to construct a simulated operating condition of the
series compensation apparatus to be tested according to the
plurality of overvoltage analysis areas and an operating condition
of the series compensation apparatus to be tested. For details,
reference can be made to the related description of the step S130
in the embodiment 1.
[0063] The overvoltage simulation analysis model construction
module 4 is configured to establish, according to the simulated
operating condition, an overvoltage simulation analysis model for
the series compensation apparatus to be tested. For details,
reference can be made to the related description of the step S140
in the embodiment 1.
[0064] The simulation and calculation 5 is configured to perform,
in each of the plurality of overvoltage analysis areas, simulating
calculations for different preset fault types according to the
overvoltage simulation analysis model to obtain a simulating
calculation result. For details, reference can be made to the
related description of the step S150 in the embodiment 1.
[0065] The lighting arrester parameter determination module 6 is
configured to determine, according to a preset lightning arrester
configuration principle and the simulating calculation result, the
number of lightning arresters installed in each of the plurality of
overvoltage analysis areas and a continuous operating voltage value
of each lightning arrester. For details, reference can be made to
the related description of the step S160 in the embodiment 1.
[0066] The safe operating voltage determination module 7 is
configured to determine, according to a preset insulation
coordination coefficient and the continuous operating voltage value
of each lightning arrester, a safe operating voltage of the series
compensation apparatus to be tested. For details, reference can be
made to the related description of the step S170 in the embodiment
1.
[0067] In an embodiment, the plurality of overvoltage analysis
areas include a series transformer grid side area, a series
transformer valve side area, a balancing winding area, and a
converter valve area.
[0068] In an embodiment, the simulation and calculation 5 is
configured to perform operations described below.
[0069] The simulation and calculation module performs a simulating
calculation according to the overvoltage simulation analysis model
to obtain a maximum steady-state operating voltage of the series
compensation apparatus to be tested.
[0070] The simulation and calculation module performs a simulating
calculation according to the overvoltage simulation analysis model
to obtain overvoltage values of the different preset fault types
for each device in the series transformer grid side area, the
series transformer valve side area, the balancing winding area and
the converter valve area of the series compensation apparatus to be
tested.
[0071] The simulation and calculation module generates the
simulating calculation result according to the maximum steady-state
operating voltage and the overvoltage values.
[0072] In an embodiment, the lighting arrester parameter
determination module 6 is configured to perform operations
described below.
[0073] The lighting arrester parameter determination module
determines, according to the preset lightning arrester
configuration principle and the simulating calculation result,
arrester installation positions and a basic parameter in each
overvoltage analysis area.
[0074] The lighting arrester parameter determination module
determines the number of the lightning arresters according to the
arrester installation positions.
[0075] The lighting arrester parameter determination module
acquires an operating requirement of each lightning arrester at the
arrester installation position based on the basic parameter, and
acquires the continuous operating voltage value of each lightning
arrester according to the operating requirement.
[0076] The lighting arrester parameter determination module
determines, according to the continuous operating voltage value and
the overvoltage simulation analysis model, the number of valve
discs to be installed for each lighting arrester.
[0077] In an embodiment, the lighting arrester parameter
determination module 6 is configured to perform operations
described below.
[0078] The lighting arrester parameter determination module
determines, according to the operating requirement of each
lightning arrester at the arrester installation position, a
chargeability and a valve disc model of each lightning
arrester.
[0079] The lighting arrester parameter determination module counts
feature values of each lighting arrester according to the
chargeability and a valve disc file corresponding to the valve disc
model of each lightning arrester.
[0080] The lighting arrester parameter determination module selects
the continuous operating voltage value corresponding to the valve
disc model from the feature values of each lightning arrester
according to the valve disc model of each lightning arrester.
[0081] In an embodiment, the feature values include a rated
continuous operating voltage, a continuous operating voltage peak
and a reference voltage.
[0082] In an embodiment, the lighting arrester parameter
determination module 6 is configured to perform operations
described below.
[0083] The lighting arrester parameter determination module
performs an energy simulating calculation on each lightning
arrester according to the overvoltage simulation analysis model to
obtain maximum received energy of each lightning arrester.
[0084] The lighting arrester parameter determination module
determines, according to the maximum received energy of each
lighting arrester, the number of valve discs to be installed of
each lighting arrester.
[0085] Through the cooperation of the above-mentioned modules, the
insulation coordination system for the series compensation
apparatus provided by the embodiment of the present application
accurately calculates overvoltage values of various devices in the
series compensation apparatus, determines a lightning arrester
configuration scheme, and further determines the safe operating
voltage of the series compensation apparatus to be tested, so that
the series compensation apparatus can safely operate under various
fault types, thereby improving stability and reliability of an
entire power transmission system. The insulation coordination
method for the series compensation apparatus has a wide application
range and a high practical engineering application value.
Embodiment 3
[0086] The embodiment of the present application provides a
non-transient computer storage medium. The computer storage medium
stores computer-executable instructions for implementing the method
according to any one of the embodiments described above. In an
embodiment, the storage medium may be a magnetic disk, an optical
disk, a read-only memory (ROM), a random access memory (RAM), a
flash memory, a hard disk drive (HDD), a solid-state drive (SDD) or
the like. The storage medium may further include a combination of
the preceding memories.
Embodiment 4
[0087] The embodiment of the present application provides an
electronic device for implementing an insulation coordination
method for a series compensation apparatus. FIG. 7 is a structural
diagram of the electronic device. As shown in FIG. 7, the
electronic device includes one or more processors 410 and a memory
420. One processor 410 is taken as an example in FIG. 7.
[0088] The electronic device for implementing the insulation
coordination method for the series compensation apparatus may
further include an input apparatus 430 and an output apparatus
440.
[0089] The processor 410, the memory 420, the input apparatus 430
and the output apparatus 440 may be connected via a bus or by other
means. FIG. 7 uses a connection via a bus as an example.
[0090] The processor 410 may be central processing unit (CPU). The
processor 410 may also be a general-purpose processor, a digital
signal processor (DSP), an application specific integrated circuit
(ASIC), a field-programmable gate array (FPGA) or other
programmable logic devices, discrete gates or transistor logic
devices, discrete hardware components, or any combination thereof.
The general-purpose processor may be a microprocessor or any
conventional processor.
[0091] As a non-transient computer-readable storage medium, the
memory 420 may be configured to store non-transient software
programs and non-transient computer-executable programs and
modules, such as program instructions/modules corresponding to the
insulation coordination method for the series compensation
apparatus in the embodiments of the present application. The
processor 410 executes the non-transient software programs,
instructions and modules stored in the memory 420 to perform one or
more functional applications and data processing of a server, that
is, to implement the insulation coordination method for the series
compensation apparatus in the method embodiments described
above.
[0092] The memory 420 may include a program storage area and a data
storage area. The program storage area may store an operating
system and an application program required by at least one
function. The data storage area may store data created according to
the use of an insulation coordination processing apparatus for the
series compensation apparatus. Additionally, the memory 420 may
include a high-speed random access memory, and may further include
a non-transient memory, such as at least one disk memory, a flash
memory or other non-transient solid-state memories. In some
embodiments, the memory 420 may optionally include memories that
are remotely disposed with respect to the processor 410. These
remote memories may be connected to an insulation coordination
apparatus for the series compensation apparatus via a network.
Examples of the preceding network include the Internet, an
intranet, a local area network, a mobile communication network and
a combination thereof.
[0093] The input apparatus 430 may receive inputted digital or
character information and generate key signal inputs related to
user settings and function control of the insulation coordination
processing apparatus for the series compensation apparatus. The
output apparatus 440 may include a display screen and other display
devices.
[0094] When executed by the one or more processors 410, one or more
modules stored in the memory 420 execute the methods shown in FIG.
1 to FIG. 5.
[0095] The above products can execute the method provided by the
embodiments of the present application, and includes functional
modules and effects corresponding to the method. Technical details
that not described in detail in the embodiments of the present
application can refer to the related descriptions of the
embodiments shown in FIG. 1 to FIG. 5.
* * * * *