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Breaker failure protection maloperation prevention improvement method and system

A failure protection and circuit breaker technology, which is applied to emergency protection circuit devices, circuit devices, emergency protection detection, etc., can solve problems such as complex circuit structure, increased construction costs, and reduced reliability, so as to reduce operation and maintenance costs and reduce work The effect of high quantity and reliability

Active Publication Date: 2022-03-29
STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing technology 4 builds an output control circuit, which has a complex structure and many components. In addition to increasing the construction cost, the reliability will be reduced due to the introduction of new components.

Method used

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  • Breaker failure protection maloperation prevention improvement method and system
  • Breaker failure protection maloperation prevention improvement method and system
  • Breaker failure protection maloperation prevention improvement method and system

Examples

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Embodiment Construction

[0056] The application will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solutions of the present invention more clearly, but not to limit the protection scope of the present application.

[0057] Such as figure 2 , the circuit breaker failure protection anti-maloperation improvement method proposed by the present invention includes:

[0058] Step 1, collecting the start-failure signal 2, the circuit breaker flow signal 3 and the circuit breaker position signal 4.

[0059] Specifically, in step 1, for conventional substations, the circuit breaker current collected by the current transformer is used to judge whether there is current flowing through the circuit breaker: when the collected circuit breaker current is not zero, it is determined that the circuit breaker current signal is a valid signal , when the collected circuit breaker current is zero, it is determined that the curren...

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Abstract

According to the circuit breaker failure protection anti-maloperation improvement method and system, a starting failure protection signal serves as an outlet enabling signal or an outlet control signal of circuit breaker failure protection, and improvement of circuit breaker failure protection opening logic is achieved; according to the improved protection logic and method presented by the invention, in practical application, an improved circuit breaker failure protection input signal is consistent with an original circuit breaker failure protection input signal, and only the circuit breaker failure protection logic needs to be changed or only one relay or linked switch needs to be added; therefore, circuit breaker failure protection maloperation caused by secondary circuit interference and other abnormalities of the circuit breaker failure protection device can be avoided, and the workload and the operation and maintenance cost of operation and maintenance personnel are greatly reduced. The method is easy to deploy and apply to transformation, wide in application range and considerable in expected generalization and economic benefits.

Description

technical field [0001] The invention belongs to the technical field of electric power system relay protection, and in particular relates to an improved method and system for preventing malfunction of circuit breaker failure protection. Background technique [0002] As an important part of backup protection in power system relay protection, circuit breaker failure protection plays an important role in the safe operation of power system. In the event of a short-circuit failure, the adjacent components cannot be cut off, and then the fault current is cut off. The circuit breaker failure protection realizes the isolation of the faulty component or line by cutting off the adjacent circuit breaker of the failed circuit breaker, and eliminates the impact of the short-circuit fault on the components and the system. Impact. [0003] The circuit breaker failure protection is composed of a voltage blocking element, a starting circuit composed of protection action and current discrimin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/26H02H7/22H02H1/00
CPCH02H7/262H02H7/263H02H7/22H02H1/0007H02H1/0061
Inventor 党一奇姚峰许鸿翔刘磊姚孟巴维韩伟马伟东王阳
Owner STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST
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