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Distribution network line fault location method and system

A technology of line fault and location method, applied in fault location, information technology support system, fault detection by conductor type, etc., to reduce the burden of operation and maintenance, accurately locate faults, and improve the reliability and intelligence of power grid power supply.

Active Publication Date: 2022-04-12
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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  • Abstract
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Problems solved by technology

[0005] This application provides a fault location method and system for a distribution network line to solve the technical problem of accurately determining the location of a fault in a distribution network

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  • Distribution network line fault location method and system
  • Distribution network line fault location method and system
  • Distribution network line fault location method and system

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Embodiment Construction

[0065] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0066] See attached figure 1 , figure 1 A schematic flowchart of a distribution network line fault location method provided by an embodiment of the present invention is shown. Attached below figure 1 The method for locating a distribution network line fault provided by the embodiment of the present application will be described.

[0067] ...

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Abstract

In the distribution network line fault location method and system provided by this application, when a single-phase ground fault or latent fault occurs in the distribution network, a pulse voltage signal will be generated, and the partial discharge detection sensor closest to the fault point o will first detect this Pulse voltage signal, and then analyze the time t when the pulse signal is first detected x And the corresponding position x, find out the detection positions y, z on both sides of the position x, and the time t when the first pulse voltage signal is detected relative to the power frequency voltage signal at position y y , the time t when the first pulse voltage signal is detected at position z relative to the power frequency voltage signal z , and then determine that the fault point o is located between position x and position y or between position x and position z, and finally calculate the specific position of fault point o from position x to complete the fault location; the application can quickly and accurately realize Online distance measurement and fault location effectively improve the reliability of power grid power supply.

Description

technical field [0001] The present application relates to the technical field of power grid fault detection, in particular to a fault location method and system for distribution network lines. Background technique [0002] As a supply-demand link connecting the transmission network and power users, the distribution network has the characteristics of many changes in line structure and complex fault conditions. Line faults will seriously affect the safe and stable operation of the power grid. The most common faults in distribution lines are single-phase ground faults and For latent faults, accurate fault location is the key technology to reduce power outage time and speed up power supply restoration. How to improve the fault location speed and reduce the difficulty of fault location is an urgent problem to be solved by those skilled in the art. [0003] At present, the commonly used fault location methods are: The first method: use the recording signal and fault briefing infor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/08G01R31/12
CPCG01R31/086G01R31/088G01R31/1272Y04S10/52
Inventor 刘红文赵现平张春丽王科
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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