On-site coinciding type fault isolation method and system

A fault isolation and reclosing technology, which is applied in the direction of automatic disconnection emergency protection devices, electrical components, circuit devices, etc., can solve the problem of long fault processing time, reduce the number of trips, and shorten the power supply recovery time.

Active Publication Date: 2017-05-31
CHINA ELECTRIC POWER RES INST +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical scheme of voltage-time feeder automation mainly utilizes the switch's "voltage-loss opening and incoming call delay closing" functions, and uses voltage and time as criteria to cooperate with the reclosing of substation outlet switches, relying on the log...

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  • On-site coinciding type fault isolation method and system
  • On-site coinciding type fault isolation method and system
  • On-site coinciding type fault isolation method and system

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Embodiment Construction

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0041] An in-situ reclosing fault isolation method provided by an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0042] figure 1It is an implementation flowchart of an in-situ reclosing fault isolation method in the embodiment of the present invention. As shown in th...

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Abstract

The invention provides an on-site coinciding type fault isolation method and system. The method comprises the steps of controlling a transformer substation outgoing breaker or a first section breaker of a main feeder for sequentially forming tripping and single shot reclosing, and isolating a main feeder fault; setting the action delay time of a branch circuit breaker to be shorter than the action delay time of the transformer substation outgoing breaker and the section breaker, and controlling the branch circuit breaker to sequentially perform tripping and single shot reclosing to isolate a main feeder branch circuit fault; setting the action delay time of a user dividing circuit breaker to be shorter than the action delay time of the transformer substation outgoing breaker, the section breaker and the branch circuit breaker, and performing controlling. Compared with the prior art, the on-site coinciding type fault isolation method and system can reduce the tripping frequency of the transformer substation outgoing breaker and further shorten the fault isolation time and the power supply recovery time of a non-fault region.

Description

technical field [0001] The invention relates to the technical field of feeder automation isolation for line faults, in particular to an on-site reclosing fault isolation method and system. Background technique [0002] On-site feeder automation technology refers to the isolation of faulty areas and power supply in non-faulty areas through communication between distribution terminals, protection coordination, or timing coordination without relying on the control of the distribution master station when a fault occurs in the distribution network. Recover, and report the process and results. At present, the on-site feeder automation scheme mainly includes intelligent distributed feeder automation and coincident feeder automation. The coincident feeder automation includes branch boundary type, voltage time type and voltage current time type feeder automation. The following is a brief description of the branch boundary type, voltage time type and voltage current time type: [00...

Claims

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Application Information

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IPC IPC(8): H02H7/26H02H3/06
CPCH02H3/06H02H7/26
Inventor 张波史常凯周勐李立生孙勇房牧邵志敏
Owner CHINA ELECTRIC POWER RES INST
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