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Last circuit breaker judgment method and device of bus tie switch involved AC field

A final circuit breaker, bus tie switch technology, applied in the direction of emergency protection circuit devices, electrical components, etc.

Active Publication Date: 2017-01-04
XJ ELECTRIC +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a method and device for judging the last circuit breaker of an AC field involving a bus tie switch, which is used to solve the problem of one-time solution of the last circuit breaker of an AC field under various power transmission modes

Method used

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  • Last circuit breaker judgment method and device of bus tie switch involved AC field
  • Last circuit breaker judgment method and device of bus tie switch involved AC field
  • Last circuit breaker judgment method and device of bus tie switch involved AC field

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Embodiment Construction

[0033] The present invention provides a method and device for judging the last circuit breaker of an AC field involving a bus tie switch, which abstracts the AC busbars of each connected N bus tie switches into corresponding N+1 nodes, thereby The problem of solving the last circuit breaker of the AC field of the switch is transformed into the problem of solving the cutting edge of the undirected connected graph, which realizes the one-time solution of the last circuit breaker of the AC field under various power transmission modes.

[0034] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0035] An embodiment of a method for judging the last circuit breaker of an AC field involving a bus tie switch:

[0036] The AC field main wiring of the inverter station including the bus tie switch is as follows: figure 1 As shown, BX and BY represent two AC busbars, and there are nine 3 / 2 AC branch strings connected in parall...

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Abstract

The invention belongs to the technical field of extra-high voltage DC engineering AC fileds, and in particular relates to a last circuit breaker judgment method and device of a bus tie switch-involved AC field. A last circuit breaker is searched by building an equivalent model of the bus tie switch-involved AC field and a last circuit breaker graph theory solution model; when the numbers and the access positions of bus tie switches, isolation switches, circuits and valve banks of the AC filed change, an original complicated control protection logic program does not need to be modified, the system device does not need to be powered off to update the program, simple configuration parameters only need to be changed on line, and the last circuit breaker between all input circuits and each converter valve can be rapidly, intelligently and accurately calculated through acquiring switch-on and switch-off states of the current circuit breaker of the AC field in real time by the system.

Description

technical field [0001] The invention belongs to the technical field of UHV direct current transmission engineering, and in particular relates to a method and device for judging the final circuit breaker of an AC field involving a bus tie switch. Background technique [0002] Finally, the circuit breaker is a key circuit breaker used to cut off the AC access line and the converter valve unit (valve group) in the AC field of the UHV DC transmission project. The valve bank will be isolated and the valve bank will be de-energized. The final circuit breaker is an important protection method in DC engineering. It is used in special cases to quickly lock the corresponding valve group by breaking the final circuit breaker to ensure safe and reliable operation of the system. [0003] The judging process of the final circuit breaker in a HVDC project is relatively complicated. Taking a conventional AC field containing 10 3 / 2 AC branch strings as an example, there are a total of 30 ci...

Claims

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Application Information

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IPC IPC(8): H02H7/26
CPCH02H7/26H02H7/268
Inventor 于海李跃鹏马为民陈大鹏胡欢曾丽丽王柏恒周林霞蒲莹尹健常亚威刘威鹏赵冠华
Owner XJ ELECTRIC
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