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Cross-interval shared information-based method for main-transformer backup protection accelerated tripping operation based on

A backup protection and information sharing technology, applied to emergency protection circuit devices, electrical components, etc., can solve the problems of not knowing the opening and closing conditions, wasting time, etc., and achieve the effects of shortening tripping time, improving performance, and improving quickness

Active Publication Date: 2014-03-12
STATE GRID CORP OF CHINA +2
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Problems solved by technology

According to this trip logic, if the bus coupler is in position or the bus coupler is charging, there is no need to send a trip command to the bus coupler intelligent terminal to drive the bus coupler section circuit breaker to trip, but because the main transformer protection does not know its opening and closing status, so it will waste some time

Method used

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  • Cross-interval shared information-based method for main-transformer backup protection accelerated tripping operation based on
  • Cross-interval shared information-based method for main-transformer backup protection accelerated tripping operation based on
  • Cross-interval shared information-based method for main-transformer backup protection accelerated tripping operation based on

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Embodiment Construction

[0019] The present invention is an accelerated tripping method for main transformer backup protection based on cross-interval sharing information, specifically an accelerated tripping method for main transformer backup protection applied in intelligent substations, which utilizes the bus tie section circuit breakers on each side of the main transformer The location information determines whether to perform the acceleration trip operation, and an acceleration trip logic is added to the backup protection function of the medium / low voltage side of the main transformer, which is mainly used in the backup protection of the main transformer protection to realize the acceleration trip of the backup protection.

[0020] The backup protection on the medium and low voltage side of the main transformer utilizes shared information across intervals to realize accelerated discrimination. This is when the tripping logic is satisfied. In this case, the main transformer protection does not need...

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Abstract

The invention belongs to the technical field of electric power systems, and in particular relates to a cross-interval shared information-based method for main-transformer backup protection accelerated tripping operation, which is applied to an intelligent transformer station. According to the method, an accelerated tripping operation logic is added into a backup protection function of a middle / low voltage side of a main transformer, and the middle / low voltage side of the main transformer realizes accelerated distinguishing by using the cross-interval shared information. By using the method disclosed by the invention, the position information of bus-couple section breaker is transmitted into main-transformer protection, and accelerated skipping of each side circuit breaker of the main transformer is realized under the condition of bus-couple sectioning or bus-couple charging, so that the tripping operation time is shortened, and the method has significant advantages of improving the speed mobility of protection, promoting the protection performance and the like.

Description

technical field [0001] The invention belongs to the technical field of power systems, and in particular relates to an accelerated tripping method for backup protection of main transformers applied to intelligent substations based on shared information across intervals. Background technique [0002] The main transformer protection consists of the main protection and various backup protections. The backup protection includes the protection of the high voltage side and the medium and low voltage side. Usually, the switching value collected by the main transformer protection includes the position of the circuit breaker on the high, medium and low sides of the main transformer, and does not collect the position information of the bus-tie section circuit breaker for each test. When the protection tripping logic of each side is satisfied, the tripping sequence is to trip the bus-tie section circuit breakers on each side of the main transformer first, and then trip the circuit break...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/04
Inventor 梁经宛于同伟葛维春黄旭王城钢李峰席亚克张仑山王雷涛
Owner STATE GRID CORP OF CHINA
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