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F-shape wiring transmitting-line fault precision potitioning method

A transmission line, fault location technology, applied in the direction of the fault location, etc., can solve the problem of not considering the problem of T-connection transmission line fault location, etc.

Inactive Publication Date: 2004-09-15
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Transmission line fault location is an important measure to ensure the safe and economical operation of the power grid. The fault location module on the fault recording device does not consider the fault location problem of the T-connection transmission line

Method used

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  • F-shape wiring transmitting-line fault precision potitioning method
  • F-shape wiring transmitting-line fault precision potitioning method
  • F-shape wiring transmitting-line fault precision potitioning method

Examples

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Embodiment Construction

[0057] The present invention comprises the following steps:

[0058] 1. Data acquisition to obtain the voltage and current signals at both ends of the detected line

[0059] 1) The voltage and current signals on the secondary side of the transmission line are converted into a low level that can be collected and measured through voltage and current transmitters, and converted into digital signals that can be processed by a computer after sampling;

[0060] 2) Since the GPS OEM board can output a second pulse with an error of less than 1 μS at multiple terminals of the transmission line, the GPS second pulse is used to calibrate the high-precision crystal oscillator of the fault location device on multiple sides of the transmission line every 1 second to ensure that the leading edge of the pulse signal output by the crystal oscillator is consistent with the GPS synchronization to control their respective data collection, realize synchronous sampling of multiple terminals of the ...

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Abstract

The method includes following steps: collecting data in order to obtain signals of voltage and current at multiple ends of tested wires; recording and exchanging electrical data before and after fault in order to obtain needed data to locate position of fault; localization of fault obtaining accuracy position of fault point. Basic reason for the method is as follows: criterion of branch, where fault occurred, is derived for transmission lines in T type connection through theoretical analysis; based on Kirchoff law, differential equation relation of electrical data at three ends of T type connection is obtained; issue of localization of fault for transmission lines in T type connection is translated to issue of localization of fault for double ends system. Thus, using method for localization of fault for double ends system existed or recommended in the invention locates fault point so as to solve issue of localization of fault for transmission lines in T type connection.

Description

technical field [0001] The invention relates to a method for accurately locating a fault in a T-connection transmission line of a power system, which belongs to the technical field of transmission equipment. Background technique [0002] Transmission line fault location is an important measure to ensure the safe and economical operation of the power grid. The fault location module on the fault recording device of the present invention does not consider the problem of fault location of the T-connection transmission line. Contents of the invention [0003] The object of the present invention is to solve the above-mentioned problems and propose a method for accurately locating faults in T-connection transmission lines of electric power systems. [0004] The technical solution provided by the present invention is: a T-connection transmission line fault location method, comprising the following steps: [0005] (1) Data acquisition to obtain the voltage and current signals of ...

Claims

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Application Information

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IPC IPC(8): G01R31/08
Inventor 陈允平龚庆武胡志坚张承学
Owner WUHAN UNIV
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