Wire fault positioning method and system

A fault location, wire technology, applied in the power field to achieve the effect of improving safety

Inactive Publication Date: 2015-10-07
POWER DISPATCHING CONTROL CENT OF GUANGDONG POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Based on this, it is necessary to provide a wire fault location method and system for the technical problem that it is difficult to fully locate the faulty phase wires in the prior art

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  • Wire fault positioning method and system
  • Wire fault positioning method and system

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Embodiment Construction

[0022] The specific embodiments of the wire fault location method and system provided by the present invention will be described in detail below with reference to the accompanying drawings.

[0023] refer to figure 1 , figure 1 Shown is a flow chart of a method for locating a wire fault according to an embodiment, including the following steps:

[0024] S10, measure the current flowing through the transformers on both sides of each phase wire in the fault occurrence area at the same time, and obtain the currents of the transformers on both sides of the A-phase respectively Current of transformers on both sides of phase B Current of transformers on both sides of phase C

[0025] In one embodiment, the above-mentioned process of measuring the current flowing through the transformers on both sides of each phase wire in the fault occurrence area at the same time may include:

[0026] Obtain the fault recording data of each phase wire in the fault area; the above fault reco...

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Abstract

The invention relates to a wire fault positioning method and a system. The wire fault positioning method comprises the following steps: currents flowing through transformers at two sides of each-phase wire in a fault happening region at the same time are measured, currents through transformers at two sides of the A phase, currents through transformers at two sides of the B phase, and currents through transformers at two sides of the C phase are obtained respectively; a sum value, a difference value and absolute values corresponding to the sum value and the difference value of currents at two sides corresponding to transformers at two sides of each-phase wire are respectively calculated; and through detecting the relationship between the sum absolute value and the difference absolute value, a fault happening phase is positioned. According to the wire fault positioning method and the system provided by the invention, each fault phase in the fault happening region can be thoroughly and accurately positioned, and safety of a power system is further improved.

Description

technical field [0001] The present invention relates to the field of electric power technology, and in particular, to a method and system for locating faults of electric wires. Background technique [0002] With the development of the power system, the scale of the power grid is expanding, and the power network is more complex. It is particularly important to improve the safe operation level of the power system. [0003] The relay protection system is an important part of the power system. Its reliable operation plays a vital role in the safe operation of the power system. The normal operation of the power system requires the relay protection device to have good performance and accurate action behavior. In recent years, the relay protection device has been greatly improved in various aspects such as principle, structure, performance and reliability, and the accuracy of the protection device has been greatly improved. However, due to various reasons such as design defects, p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08
Inventor 黄明辉陈志光曾耿晖焦邵麟李一泉张智锐王峰刘刚祁鸿燕蒋纬纬赵纪元张利强杨东
Owner POWER DISPATCHING CONTROL CENT OF GUANGDONG POWER GRID CO LTD
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