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Method for rapidly and accurately searching location of single-phase earth fault and detection equipment

A single-phase ground fault and detection equipment technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve problems such as failure to find fault points, shorten the time of single-phase ground fault, reduce the risk of test delivery, shorten the The effect of blackout time

Inactive Publication Date: 2018-10-09
浙江德辉建设有限公司
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AI Technical Summary

Problems solved by technology

The single-phase ground fault point is often hidden, and the fault point cannot be found in the whole line inspection, so it is necessary to contact the dispatcher for trial delivery

Method used

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  • Method for rapidly and accurately searching location of single-phase earth fault and detection equipment
  • Method for rapidly and accurately searching location of single-phase earth fault and detection equipment
  • Method for rapidly and accurately searching location of single-phase earth fault and detection equipment

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Embodiment Construction

[0020] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0021] see figure 1 , the present invention provides a technical solution: a method for quickly and accurately finding a single-phase ground fault point. After a single-phase ground fault occurs, first disconnect any switch on the main line, and use a detection device to measure the voltage on both sides of the disconnect switch. If the resistance on one side is small, continue to select the disconnect switch within the scope of this side and use the detection equipment to measure until the branch line where the single-phase ground fault is determined, then disconnect any switch on the branch line, and repeat the above steps. Until the minimum range where the point of failure is determined.

[0022] The method of using the detection equipment for...

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Abstract

The invention discloses a method for rapidly and accurately searching the location of a single-phase earth fault and detection equipment. Any switch on a main circuit is disconnected firstly when thesingle-phase earth fault occurs; the detection equipment is used to measure the resistance of the two sides of the disconnected switch; if the resistance of one side is relatively low, then another switch is selected and disconnected within the range of the side and the detection equipment is used to measure until a branch of the single-phase earth fault is determined, any switch on the branch isthen disconnected, and the above steps are repeated until the minimum range of the location of the fault is determined. The method shortens the time for processing the single phase earth fault, effectively solves the problems of difficulty in searching the single phase earth fault and long processing time, shortens the interruption duration of a user, also improves the working efficiency, reducesthe risk of trial line charging, and is suitable for the rural areas where electric power circuits are relatively scattered.

Description

technical field [0001] The invention relates to the technical field of electric power detection, in particular to a method and detection equipment for quickly and accurately finding a single-phase grounding fault point. Background technique [0002] Single-phase grounding is a single-phase grounding of 10kV (35kV) small current grounding system. Single-phase grounding fault is the most common fault in power distribution system, which mostly occurs in humid and rainy weather. It is caused by many factors such as tree barriers, single-phase breakdown of insulators on distribution lines, single-phase disconnection, and small animal hazards. Single-phase grounding not only affects the normal power supply of users, but also may generate overvoltage, burn out equipment, and even cause phase-to-phase short circuit to expand accidents. It is very important for the personnel on duty to be familiar with the handling method of ground fault. The failure has led to a decrease in the re...

Claims

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Application Information

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IPC IPC(8): G01R31/02
CPCG01R31/50
Inventor 李德水张新明汪华燕徐金松汪华玲
Owner 浙江德辉建设有限公司
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