Method and device for judging fault type of power distribution network line

A technology for distribution network and disconnection faults, which is applied in the field of judgment of distribution network line fault types, can solve problems such as high cost, and achieve high practicability, easy implementation, and simple judgment process

Active Publication Date: 2020-10-30
云南电力技术有限责任公司
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Problems solved by technology

[0005] This application provides a method and device for determining the fault type of a distribu

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  • Method and device for judging fault type of power distribution network line
  • Method and device for judging fault type of power distribution network line
  • Method and device for judging fault type of power distribution network line

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[0058] In order to make the objectives, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0059] In order to solve the problem, an embodiment of the present application provides a method for determining a fault type of a distribution network line, which is specifically used to solve the problem of high technical cost in the prior art. It should be noted that a distribution transformer monitoring terminal device may be installed at the outlet of the low-voltage side output end of the line to be determined in the distribution network to perform the method for determining the fault type of the distribution network line provided by the embodiment of the present application.

[0060] Before determining the fault type, obtain the location of the fault in the line to be determined in the distribution network.

[0061] Specifically, t...

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Abstract

The invention provides a method and device for judging the fault type of a power distribution network line. The method comprises the following steps of: according to a fault occurrence position in theto-be-judged line in the power distribution network, acquiring a three-phase initial current signal before a fault and a three-phase fault current signal after the fault, which are output by a low-voltage side of a line, and analyzing the amplitude and phase of the three-phase fault current signal and the amplitude and phase of the three-phase initial current signal to judge the three-phase faulttype of the power distribution network line. Thus, the whole judgment process is simple and easy to implement, the fault type can be conveniently, timely and accurately judged, the technical cost islow, and high practicability is achieved.

Description

technical field [0001] The present application relates to the technical field of electric power monitoring, and in particular to a method and device for determining the fault type of a distribution network line. Background technique [0002] As people's requirements for power supply quality and reliability are getting higher and higher, the scale of distribution network construction continues to expand and its structure becomes more and more complex. These reasons make the distribution network vulnerable to many factors in the actual operation process. malfunction. Since the distribution network failure will affect the power supply efficiency, and even cause the line to be burned in severe cases, causing serious losses, it is helpful to promptly and accurately determine the fault after the fault occurs, which will help to quickly formulate corresponding fault repair measures and ensure the distribution network. of normal operation. [0003] At present, the commonly used fa...

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Application Information

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IPC IPC(8): G01R31/08G01R31/52G01R31/54G01R31/58
CPCG01R31/086G01R31/52G01R31/54G01R31/58Y04S10/52
Inventor 田小航舒荣王荣泰徐文力赵燕团李碧波
Owner 云南电力技术有限责任公司
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