Regional power grid fault isolation and recovery method

A regional power grid and fault recovery technology, applied in the direction of electrical components, circuit devices, emergency protection circuit devices, etc., to achieve the effect of restoring system power supply

Inactive Publication Date: 2013-02-13
XJ ELECTRIC +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of manually closing the isolation gates on both sides of the faulty circuit breaker and tripping the other circuit breakers when the existing regional power grid faults are isolated and restored.

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  • Regional power grid fault isolation and recovery method

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Embodiment Construction

[0019] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0020] Embodiment of a method for isolating regional power grid faults according to the present invention

[0021] 1. Firstly, by using the networked protection control device to obtain all the protection actions and state remote information in the power grid to confirm the phase difference of the circuit breaker that caused the failure, such as figure 1 As shown, due to the mechanical failure of the operating mechanism, phase A of 1DL failed to disconnect, and phase A of line L1 had a ground fault;

[0022] 2. According to the tripping command issued by the corresponding line relay protection device, the faulty circuit breaker will be tripped for three phases, and the failure protection will trip the three phases of the faulty circuit breaker after a delay, that is, the three phases of 1DL;

[0023] 3. The delay trip is different from the ...

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Abstract

The invention relates to a regional power grid fault isolation and recovery method. The method comprises the following steps of: firstly, determining the phase of a circuit breaker which does not work normally due to faults; performing three-phase tripping on a faulty circuit breaker through failure protection time delay; meanwhile, tripping the phase of the corresponding fault phase of a circuit breaker adjacent to the circuit breaker in a time delay way; judging whether each phase of current of the faulty circuit breaker is zero, if so, automatically separating disconnecting links at both sides of the faulty circuit breaker; and finally automatically reclosing the corresponding phases of other circuit breakers adjacent to the faulty circuit breaker so as to achieve the action of automatically and quickly recovering system power supply. According to the invention, the disconnecting links of the faulty circuit breaker are automatically pulled open after failure protection action information is acquired according to the regional power grid network protection control system, the circuit breaker is switched from an operating state to a cold standby state, and afterwards, the protection control system quickly recovers other circuit breakers in the hot standby state so as to achieve the purpose of automatically and quickly recovering system power supply.

Description

technical field [0001] The invention relates to a regional power grid fault isolation and recovery method, which belongs to the field of automatic control of electric power systems. Background technique [0002] When the power grid fails, the relay protection action trips all the circuit breakers adjacent to the fault point. When a certain circuit breaker fails to operate, the failure protection action trips all the circuit breakers adjacent to this circuit breaker. After the fault is isolated, the isolation switches on both sides of the faulty circuit breaker are artificially opened to switch to the cold standby state for maintenance. Then manually close the circuit breaker that was tripped during the failure protection action according to a certain order to restore the system power supply. Contents of the invention [0003] The purpose of the present invention is to solve the problem of the isolation and recovery of existing regional power grid faults, which require man...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/26H02H3/06
Inventor 倪传坤李宝伟李旭张新萍李文正王莉赵成功唐艳梅郝慧贞石欣
Owner XJ ELECTRIC
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