CN117233593A - Stability evaluation method, device and medium for high-voltage direct-current circuit breaker - Google Patents
Stability evaluation method, device and medium for high-voltage direct-current circuit breaker Download PDFInfo
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- CN117233593A CN117233593A CN202311512074.9A CN202311512074A CN117233593A CN 117233593 A CN117233593 A CN 117233593A CN 202311512074 A CN202311512074 A CN 202311512074A CN 117233593 A CN117233593 A CN 117233593A
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- 230000005856 abnormality Effects 0.000 claims description 10
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- 238000004590 computer program Methods 0.000 claims description 8
- 239000003990 capacitor Substances 0.000 claims description 5
- 238000002955 isolation Methods 0.000 claims description 5
- 238000005259 measurement Methods 0.000 claims description 5
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- 238000013097 stability assessment Methods 0.000 claims 5
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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Abstract
The application relates to a method, a device and a medium for evaluating stability of a high-voltage direct-current breaker, wherein the method comprises the following steps: constructing a corresponding multi-level index according to the predefined multi-level faults of the high-voltage direct-current circuit breaker; and constructing a high-voltage direct current breaker stability evaluation model covering the multi-level indexes, and calculating the stability of the high-voltage direct current breaker according to the high-voltage direct current breaker stability evaluation model. According to the scheme, the running stability of the equipment can be evaluated, so that the running state of the equipment can be mastered in time, and the reliability is improved.
Description
Technical Field
The application relates to the technical field of direct current transmission systems, in particular to a method, a device and a medium for evaluating stability of a high-voltage direct current breaker.
Background
The high-voltage direct-current breaker has millisecond-level high-current breaking capacity and is key equipment for guaranteeing stable and reliable operation of the flexible direct-current power grid.
However, the actual engineering application of the current high-voltage direct-current circuit breaker is very few, the operation time is not long, and the experience in the aspect of stability evaluation is lacking. The method for evaluating the running stability of the high-voltage direct-current circuit breaker is needed to be provided, the running state of the equipment is mastered in time, and the running reliability of the equipment is practically improved.
Disclosure of Invention
Aiming at the problems, the application aims to provide a high-voltage direct-current breaker stability evaluation method, a device and a medium, which can evaluate the running stability of equipment so as to timely master the running state of the equipment, and are practical and reliable.
In order to achieve the above purpose, the present application adopts the following technical scheme:
in a first aspect, the present application provides a method for evaluating stability of a high voltage dc breaker, the method comprising:
constructing a corresponding multi-level index according to the predefined multi-level faults of the high-voltage direct-current circuit breaker;
and constructing a high-voltage direct current breaker stability evaluation model covering the multi-level indexes, and calculating the stability of the high-voltage direct current breaker according to the high-voltage direct current breaker stability evaluation model.
In one implementation of the present application, the predefined multi-level faults include a primary fault and a secondary fault;
the primary fault is a component fault of the high-voltage direct-current breaker forbidden to be separated and closed;
the secondary fault is a fault that a redundant set of components of the high voltage direct current breaker is not available and the high voltage direct current breaker can continue to operate.
In one implementation of the application, the components of the high-voltage direct-current breaker comprise a mechanical switch, an IGBT, a diode, a lightning arrester, an energy supply system and a secondary control system.
In one implementation of the present application, the primary failure at least includes: the lightning arrester breaks down the trouble, two sets of UPS trouble and switch to static bypass branch circuit failure, 535kV main power supply change SF6 pressure low tripping, 110kV isolation change SF6 pressure low tripping, main power supply change communication abnormality, control protection system and measurement system communication abnormality.
In one implementation of the present application, the secondary failure at least includes: the mechanical switch control power supply is abnormal, the mechanical switch main control unit/optical interface unit-to-drive board communication is abnormal, the mechanical switch drive board-to-breaker optical interface unit uplink communication is abnormal, the mechanical switch capacitor charging loop is abnormal, and the main branch power electronic module control power supply is abnormal.
In one implementation manner of the present application, the calculating the stability of the high voltage dc breaker according to the high voltage dc breaker stability evaluation model includes:
counting according to the operation data of the high-voltage direct-current circuit breaker to obtain the input data of the high-voltage direct-current circuit breaker stability evaluation model;
and inputting the input data into the stability evaluation model of the high-voltage direct-current circuit breaker, and calculating the stability of the high-voltage direct-current circuit breaker according to a preset formula.
In a second aspect, the present application provides a device for evaluating stability of a high voltage dc breaker, the device comprising:
the index construction unit is used for constructing corresponding multi-level indexes according to the predefined multi-level faults of the high-voltage direct-current circuit breaker;
the model construction unit is used for constructing a high-voltage direct current breaker stability evaluation model covering the multi-level indexes and calculating the stability of the high-voltage direct current breaker according to the high-voltage direct current breaker stability evaluation model.
In one implementation of the present application, the predefined multi-level faults predefined by the index construction unit include a primary fault and a secondary fault;
the primary fault is a component fault of the high-voltage direct-current breaker forbidden to be separated and closed;
the secondary fault is a fault that a redundant set of components of the high voltage direct current breaker is not available and the high voltage direct current breaker can continue to operate.
In one implementation of the application, the components of the high-voltage direct-current breaker comprise a mechanical switch, an IGBT, a diode, a lightning arrester, an energy supply system and a secondary control system.
In one implementation of the present application, the primary failure at least includes: the lightning arrester breaks down the trouble, two sets of UPS trouble and switch to static bypass branch circuit failure, 535kV main power supply change SF6 pressure low tripping, 110kV isolation change SF6 pressure low tripping, main power supply change communication abnormality, control protection system and measurement system communication abnormality.
In one implementation of the present application, the secondary failure at least includes: the mechanical switch control power supply is abnormal, the mechanical switch main control unit/optical interface unit-to-drive board communication is abnormal, the mechanical switch drive board-to-breaker optical interface unit uplink communication is abnormal, the mechanical switch capacitor charging loop is abnormal, and the main branch power electronic module control power supply is abnormal.
In one implementation manner of the application, the model construction unit is used for carrying out statistics according to the operation data of the high-voltage direct-current breaker to obtain the input data of the high-voltage direct-current breaker stability evaluation model; and inputting the input data into the stability evaluation model of the high-voltage direct-current circuit breaker, and calculating the stability of the high-voltage direct-current circuit breaker according to a preset formula.
In a third aspect, the present application provides a computer readable storage medium, where a computer program is stored, where the computer program controls a device where the computer readable storage medium is located to execute the method for evaluating stability of a high voltage dc breaker according to the first aspect.
Due to the adoption of the technical scheme, the application has the following advantages: according to the method in the scheme of the application, the corresponding multi-level indexes are constructed according to the predefined multi-level faults of the high-voltage direct-current circuit breaker, the high-voltage direct-current circuit breaker stability evaluation model covering the multi-level indexes is further constructed, the stability of the high-voltage direct-current circuit breaker is calculated according to the high-voltage direct-current circuit breaker stability evaluation model, the running stability of equipment can be evaluated, the running state of the equipment can be mastered in time, and the reliability is high.
Drawings
Fig. 1 is a flow chart of a method for evaluating stability of a high-voltage direct-current breaker according to an embodiment of the application;
fig. 2 is a schematic structural diagram of a computer device according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present application. It will be apparent that the described embodiments are some, but not all, embodiments of the application. All other embodiments, which are obtained by a person skilled in the art based on the described embodiments of the application, fall within the scope of protection of the application.
Aiming at the problem that the operation stability evaluation method of the high-voltage direct-current breaker needs to be proposed in the prior art. The application correspondingly provides a high-voltage direct-current breaker stability evaluation method, a device and a computer readable storage medium. Wherein the method comprises the following steps: constructing a corresponding multi-level index according to the predefined multi-level faults of the high-voltage direct-current circuit breaker; and constructing a high-voltage direct current breaker stability evaluation model covering the multi-level indexes, and calculating the stability of the high-voltage direct current breaker according to the high-voltage direct current breaker stability evaluation model. The application can evaluate the running stability of the equipment, thereby timely grasping the running state of the equipment and ensuring the reliability.
The above-described methods, apparatus, and media are described in some embodiments of the application in conjunction with the accompanying drawings.
In a more specific embodiment of the present application, as shown in fig. 1, there is provided a method for evaluating stability of a high voltage dc circuit breaker, the method comprising:
s11, constructing corresponding multi-level indexes according to the predefined multi-level faults of the high-voltage direct-current circuit breaker;
s12, constructing a high-voltage direct current breaker stability evaluation model covering the multi-level indexes, and calculating the stability of the high-voltage direct current breaker according to the high-voltage direct current breaker stability evaluation model.
The high-voltage direct-current breaker is a complex electrical system, and consists of a main branch, a transfer branch and an energy consumption branch, and comprises a plurality of groups of components such as a quick mechanical switch, an IGBT, a diode, a lightning arrester, an energy supply system, a secondary control system and the like. The operation characteristics and the fault characteristics of different groups of components are different, the redundancy is different, and the influence on the overall stability of the high-voltage direct-current breaker after the fault is also different.
The stability evaluation index system of the direct current breaker comprises a first-level index and a second-level index.
The first-level index is a component fault which directly causes the direct current breaker to be forbidden to be separated and closed. The method comprises the steps of breakdown fault of a lightning arrester, failure of two sets of UPS faults and failure of switching to a static bypass branch, 535kV main power supply variable SF6 pressure low tripping (three-out-two), 110kV isolation variable SF6 pressure low tripping (three-out-two), main power supply variable communication abnormality, control protection system and measurement system communication abnormality and the like.
The secondary index refers to a fault that renders the dc breaker group component unusable. Since the components are often redundant, the dc breaker can continue to operate when the components are not available in the event of sufficient redundancy. Such faults include anomalies in the mechanical switch control power supply, anomalies in the mechanical switch master control unit/optical interface unit to drive board communications, anomalies in the mechanical switch drive board to circuit breaker optical interface unit upstream communications, anomalies in the mechanical switch capacitor charging loop, anomalies in the main branch power electronic module control power supply, and the like.
Counting according to the operation data of the high-voltage direct-current circuit breaker to obtain the input data of the high-voltage direct-current circuit breaker stability evaluation model; and inputting the input data into the stability evaluation model of the high-voltage direct-current circuit breaker, and calculating the stability of the high-voltage direct-current circuit breaker according to a preset formula.
In the embodiment of the application, the input data of the stability evaluation model of the high-voltage direct-current circuit breaker comprises the following steps: a primary index and a secondary index; the number of group part faults caused by the secondary indexes, the group part fault rate caused by the secondary indexes and the redundancy number of the corresponding group part of faults caused by the secondary indexes; and the number of group part faults caused by the first-level index, the group part fault rate caused by the first-level index and the redundancy number of the corresponding group part of the faults caused by the first-level index.
The stability evaluation model of the direct current breaker provided by the application is shown in the formula (1) and the formula (2).
（1）
（2）
Wherein X represents the stability of the direct current breaker, N1 represents the number of primary indexes, i represents the number of primary indexes, N2 represents the number of component failures caused by secondary indexes, j represents the number of component failures caused by secondary indexes, M represents the number of secondary indexes, q represents the number of secondary indexes,representing the first-level index failure rate->Equal to the redundancy of the corresponding group of components of the first-order index, < >>Representing the failure rate of the component caused by the second level index, < >>Equal to the redundancy of the components of the fault corresponding group caused by the secondary index, +.>Representing the failure rate of the second level index->And the redundancy number corresponding to the secondary index is equal.
In another aspect of the embodiment of the present application, there is also provided a stability evaluation device for a high voltage dc breaker, including:
the index construction unit is used for constructing corresponding multi-level indexes according to the predefined multi-level faults of the high-voltage direct-current circuit breaker;
the model construction unit is used for constructing a high-voltage direct current breaker stability evaluation model covering the multi-level indexes and calculating the stability of the high-voltage direct current breaker according to the high-voltage direct current breaker stability evaluation model.
The device in the embodiment of the application realizes the stability evaluation method of the high-voltage direct-current breaker in the embodiment of the application. The flow of the specific method can be referred to the description of the foregoing embodiments, and the description will not be repeated.
In another aspect of the embodiments of the present application, there is correspondingly provided a computer storage medium.
The embodiment of the application also provides a computer readable storage medium, wherein the storage medium comprises a stored program, and the equipment where the storage medium is controlled to execute the virtual impedance control method for the hybrid cascade direct current system when the program runs. The detailed implementation process is not repeated here.
The embodiment of the application also provides a computer device 500, as shown in fig. 2. The computer device 500 of this embodiment includes: the processor 501, the memory 502, and the computer program 503 stored in the memory and capable of running on the processor 501, where the processor 501 executes the computer program 503 to implement the method in the embodiment, and for avoiding repetition, details are not described herein. Alternatively, the computer program when executed by the processor 501 implements the functions of the models/units in the control device in the embodiment, and in order to avoid repetition, it is not described in detail herein.
The computer device 500 may be a desktop computer, a notebook computer, a palm top computer, a server, a cloud server, or the like. Computer devices may include, but are not limited to, a processor 501, a memory 502. It will be appreciated by those skilled in the art that fig. 2 is merely an example of a computer device 500 and is not intended to limit the computer device 500, and may include more or fewer components than shown, or may combine certain components, or different components, e.g., a computer device may also include an input-output device, a network access device, a bus, etc.
The processor 501 may be a central processing unit (Central Processing Unit, CPU), but may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), field programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 502 may be an internal storage unit of the computer device 500, such as a hard disk or a memory of the computer device 500. The memory 502 may also be an external storage device of the computer device 300, such as a plug-in hard disk provided on the computer device 500, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash Card (Flash Card), or the like. Further, the memory 502 may also include both internal storage units and external storage devices of the computer device 500. The memory 502 is used to store computer programs and other programs and data required by the computer device. The memory 502 may also be used to temporarily store data that has been output or is to be output.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the above elements is merely a logical functional division, and there may be additional divisions in actual implementation, e.g., multiple elements or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The integrated units implemented in the form of software functional units described above may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium, and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a Processor (Processor) to perform part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the application.
Claims (13)
1. A method for evaluating stability of a high voltage direct current circuit breaker, the method comprising:
constructing a corresponding multi-level index according to the predefined multi-level faults of the high-voltage direct-current circuit breaker;
and constructing a high-voltage direct current breaker stability evaluation model covering the multi-level indexes, and calculating the stability of the high-voltage direct current breaker according to the high-voltage direct current breaker stability evaluation model.
2. The method of claim 1, wherein the predefined multi-level faults include a primary fault and a secondary fault;
the primary fault is a component fault of the high-voltage direct-current breaker forbidden to be separated and closed;
the secondary fault is a fault that a redundant set of components of the high voltage direct current breaker is not available and the high voltage direct current breaker can continue to operate.
3. The method of claim 2, wherein the components of the high voltage dc circuit breaker include a mechanical switch, an IGBT, a diode, a lightning arrester, an energy supply system, and a secondary control system.
4. The method for evaluating the stability of a high voltage direct current breaker according to claim 3, wherein the primary fault comprises at least: the lightning arrester breaks down the trouble, two sets of UPS trouble and switch to static bypass branch circuit failure, 535kV main power supply change SF6 pressure low tripping, 110kV isolation change SF6 pressure low tripping, main power supply change communication abnormality, control protection system and measurement system communication abnormality.
5. The method for evaluating the stability of a high voltage direct current breaker according to claim 3, wherein the secondary fault comprises at least: the mechanical switch control power supply is abnormal, the mechanical switch main control unit/optical interface unit-to-drive board communication is abnormal, the mechanical switch drive board-to-breaker optical interface unit uplink communication is abnormal, the mechanical switch capacitor charging loop is abnormal, and the main branch power electronic module control power supply is abnormal.
6. The method of claim 1, wherein calculating the stability of the high voltage dc circuit breaker according to the high voltage dc circuit breaker stability assessment model comprises:
counting according to the operation data of the high-voltage direct-current circuit breaker to obtain the input data of the high-voltage direct-current circuit breaker stability evaluation model;
and inputting the input data into the stability evaluation model of the high-voltage direct-current circuit breaker, and calculating the stability of the high-voltage direct-current circuit breaker according to a preset formula.
7. A high voltage dc circuit breaker stability assessment device, the device comprising:
the index construction unit is used for constructing corresponding multi-level indexes according to the predefined multi-level faults of the high-voltage direct-current circuit breaker;
the model construction unit is used for constructing a high-voltage direct current breaker stability evaluation model covering the multi-level indexes and calculating the stability of the high-voltage direct current breaker according to the high-voltage direct current breaker stability evaluation model.
8. The apparatus according to claim 7, wherein the predefined multi-level faults predefined by the index construction unit include a primary fault and a secondary fault;
the primary fault is a component fault of the high-voltage direct-current breaker forbidden to be separated and closed;
the secondary fault is a fault that a redundant set of components of the high voltage direct current breaker is not available and the high voltage direct current breaker can continue to operate.
9. The hvdc breaker stability assessment device of claim 8, wherein the components of the hvdc breaker comprise mechanical switches, IGBTs, diodes, lightning arresters, energy supply systems, secondary control systems.
10. The high voltage direct current breaker stability assessment device of claim 9, wherein the primary fault comprises at least: the lightning arrester breaks down the trouble, two sets of UPS trouble and switch to static bypass branch circuit failure, 535kV main power supply change SF6 pressure low tripping, 110kV isolation change SF6 pressure low tripping, main power supply change communication abnormality, control protection system and measurement system communication abnormality.
11. The high voltage direct current breaker stability assessment device of claim 9, wherein the secondary fault comprises at least: the mechanical switch control power supply is abnormal, the mechanical switch main control unit/optical interface unit-to-drive board communication is abnormal, the mechanical switch drive board-to-breaker optical interface unit uplink communication is abnormal, the mechanical switch capacitor charging loop is abnormal, and the main branch power electronic module control power supply is abnormal.
12. The apparatus according to claim 7, wherein the model construction unit performs statistics based on operation data of the high voltage dc breaker to obtain input data of the high voltage dc breaker stability evaluation model; and inputting the input data into the high-voltage direct current breaker stability evaluation model, and calculating the stability of the high-voltage direct current breaker according to a preset formula.
13. A computer readable storage medium, wherein a computer program is stored in the computer readable storage medium, and the computer program controls a device where the computer readable storage medium is located to execute the method for evaluating the stability of the high voltage direct current breaker according to any one of claims 1 to 6 when running.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311512074.9A CN117233593A (en) | 2023-11-14 | 2023-11-14 | Stability evaluation method, device and medium for high-voltage direct-current circuit breaker |
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| CN202311512074.9A CN117233593A (en) | 2023-11-14 | 2023-11-14 | Stability evaluation method, device and medium for high-voltage direct-current circuit breaker |
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