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

Active Publication Date: 2014-10-29
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcomings of the above-mentioned prior art, the present invention provides a method for rest

Method used

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  • Power restoration method for voltage type fault section front end
  • Power restoration method for voltage type fault section front end

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Embodiment Construction

[0018] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0019] Such as figure 1 Among them, FCB is a substation 10kV outlet switch, PVS is a voltage-type section switch, A and F are the first section, and B-E is the non-first section. Combine below figure 2 The flow chart of the present invention is explained to the method of the present invention:

[0020] The overall idea of ​​the method of the present invention is: use the fault processing function of the distribution automation master station system to calculate the time from reclosing to tripping according to topology information, substation protection trip time, first reclosing time, and substation tripping time again. Then, according to this time, calculate with the time limit setting parameters of the voltage-type switchgear on the line, and determine the specific section of the fault zone.

[0021] When the calculated fault zone is located in the first z...

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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.

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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Application Information

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IPC IPC(8): H02H7/26H02H3/06
Inventor 林祺蓉王俏俏刘红霞王景川董晨晖王晓军林琳
Owner STATE GRID CORP OF CHINA
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