On-site coinciding type fault isolation method and system

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...

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 logic of the terminal equipment itself Judgment function, automatic isolation of faults, restoration of power supply in non-fault areas, and voltage-time feeder automation may need to cooperate with multiple reclosing in practical applications, and the fault processing time is longer

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