Power restoration method for voltage type fault section front end

A technology for recovering power supply in the fault zone, applied to electrical components, circuit devices, emergency protection circuit devices, etc., to achieve the effect of reducing costs
CN104124672AActive Publication Date: 2014-10-29STATE GRID CORP OF CHINA +2
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
STATE GRID CORP OF CHINA
Publication Date
2014-10-29

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Abstract

Disclosed is a power restoration method for a voltage type fault section front end. Time from reclosing to tripping is calculated according to transformer substation protection trip time, first reclosing time, and transformer substation re-tripping time; calculation is performed according to the time and time limit set parameters of a voltage type switch device on lines so as to determine a specific section of a fault section; when a fault is located in a first section, a master station system shuts switching-on of a transformer substation line outlet switch; when the fault is located in a non-first section, the master station system sends out a switching-on instruction in a remote control mode. According to the power restoration method for the voltage type fault section front end, under the condition that the transformer substation line outlet switch lacks secondary reclosing, the fault section is automatically judged by using a distribution automation system; under the condition that secondary reclosing of a transformer substation protection device is not transformed, the problem of power restoration of the voltage type feeder automation fault section can be solved, meanwhile, modification of a transformer substation reclosing device can be avoided, expenses for changing settings or replacing devices are reduced, and an influence on operation of the transformer substation protection device is avoided.
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Description

technical field

[0001] The invention relates to a distribution network fault processing technology, in particular to a method for restoring power supply at the front end of a voltage-type fault interval. Background technique

[0002] The existing standard voltage time-type feeder automation uses voltage as the fault criterion. When a fault occurs, the substation trips. After the substation recloses, the terminals go through the delayed closing step by step. After closing to the fault section, the substation trips again to identify the fault section; After the substation is re-closed, the terminals are delayed to close again step by step, and the front-end terminals of the fault section are blocked to complete the isolation of the fault section and realize the restoration of power supply at the front-end of the fault section.

[0003] In this mode of operation, the substation needs to reclose twice to realize the isolation of the fault area and the restoration of power suppl...

Claims

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