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Quick switch arc-extinction system suitable for high-resistance grounding faults

A high-impedance ground fault, fast switching technology, applied in the direction of fault location, emergency protection circuit device for limiting overcurrent/overvoltage, information technology support system, etc., can solve problems such as immature research and reduce hardware investment cost, fast and accurate grounding, and the effect of reducing personal safety hazards

Pending Publication Date: 2018-02-06
STATE GRID CORP OF CHINA +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This technology has a good development prospect, but its related research is not mature enough, and there are still many problems in the application of actual engineering.

Method used

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  • Quick switch arc-extinction system suitable for high-resistance grounding faults
  • Quick switch arc-extinction system suitable for high-resistance grounding faults
  • Quick switch arc-extinction system suitable for high-resistance grounding faults

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Experimental program
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Embodiment Construction

[0013] The realization method of the system of the present invention is as follows:

[0014] For the case of small transition resistance in single-phase ground fault, because the selection of line and phase is relatively difficult, it can be directly judged by phase selection of fast switch arc suppression device, quickly transfer fault phase current, limit arc overvoltage, and protect personal safety; for In the case of a large transition resistance in a single-phase ground fault, the system of the present invention uses a high-precision synchronous measurement terminal to collect fault data after the fault occurs, and uploads the data to the line selection and positioning device for phase selection and line positioning analysis. The line selection and positioning device will The results are output to the fast switch arc suppression device, and the device operates. Because the line selection and phase selection are difficult under the condition of large transition resistance, ...

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Abstract

The invention relates to a quick switch arc-extinction system suitable for high-resistance grounding faults. The system is characterized by comprising a quick switch arc-extinction device installed ona bus of a transformer substation. The quick switch arc-extinction device is connected with a synchronous measurement terminal through a phase-selecting and positioning device installed in a main control room of the transformer substation. In this way, fault data can be collected by the synchronous measurement terminal after the occurrence of a fault, and then the fault data are uploaded to the phase-selecting and positioning device to be subjected to phase selection, line selection and positioning analysis. After that, a result is outputted to the quick switch arc-extinction device for further action. The results of trials show that, by adopting the system, the hardware investment cost can be reduced, and the line selection effect can be effectively improved. Meanwhile, the damage to thepersonal safety caused by the grounding fault is reduced. Moreover, the fast and accurate grounding of a fault phase and the tripping of a fault line are achieved.

Description

technical field [0001] The invention relates to a fast switch arc suppression system suitable for high-resistance grounding faults. Background technique [0002] In the modern distribution network with increasing capacitive current, there are certain limitations and deficiencies in the application of neutral point ungrounded mode, neutral point resonant grounded mode and neutral point low resistance grounded mode, which urgently need to be developed The related work of ground current rapid transfer protection technology research and device development realizes the functions of rapidly transferring fault current when a single-phase ground fault occurs, suppressing arc-flash ground overvoltage, and shortening the action time of arc-flash ground overvoltage. While reducing hardware investment costs, it can effectively improve the effect of line selection and reduce the harm of ground faults to personal safety. [0003] The principle of the ground current rapid transfer protect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/08G01R31/08
CPCH02H9/08G01R31/086Y04S10/52
Inventor 吴旭涛艾绍贵李秀广陈凯马波蔡伟丁培文习山陈小月顾然倪辉马云龙王羽
Owner STATE GRID CORP OF CHINA
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