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Accurate trouble-locating method for electricity transmission lines with SC

A transmission line and fault location technology, applied in fault location, information technology support system, etc., can solve the problem of inability to eliminate the influence of transition resistance and booster current of the end system, large positioning error, and inability to accurately describe the fault transient process behavior And other issues

Inactive Publication Date: 2006-12-13
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most of the fault location modules on the fault recording devices produced by domestic and foreign power equipment companies use unilateral current and voltage signals, and the mathematical model used is an algebraic equation describing the steady-state process, which has defects in principle and cannot eliminate the transition resistance. and the influence of the boosting current of the end system, it is impossible to accurately describe the transient process behavior of the electrical quantity during the fault. Therefore, the existing fault analysis and positioning methods have theoretical deficiencies. Due to the influence of various factors, the positioning error is relatively large.

Method used

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  • Accurate trouble-locating method for electricity transmission lines with SC
  • Accurate trouble-locating method for electricity transmission lines with SC
  • Accurate trouble-locating method for electricity transmission lines with SC

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Embodiment Construction

[0042] specific implementation

[0043] Implementation steps:

[0044] 1. Data acquisition to obtain the voltage and current signals at both ends of the detected line

[0045] 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 (TV, TA transmitters), and then digital-to-analog conversion (A / D or V / F conversion) and sampling card acquisition to obtain the digital signal that the computer can process;

[0046] 2) The GPS OEM board of this device can output a second pulse with an error of less than 50ns at multiple terminals of the transmission line, and 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 synchronized with GPS , to control the respective data collection, rea...

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PUM

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Abstract

The invention is a serial-compensated transmission line failure pinpointing method, building a differential equation of transmission line failure according to component characteristic and Kirchhoff's laws, adopting multiple-end voltage and current signal as failure positioning information, and using GPS accurate time system to insure data synchronism, and it can be applied to wide range and pinpoint the transmission line failure.

Description

technical field [0001] The invention relates to a method for accurately locating faults of transmission lines with series compensation capacitors using multi-terminal signals, and belongs to the technical field of power transmission equipment. Background technique [0002] Transmission line fault location is an important measure to ensure the safe and economical operation of the power grid. It is a research difficulty and hot spot in the field of power systems. At present, the existing fault location methods are mainly divided into traveling wave method and fault analysis method. [0003] At present, most of the fault location modules on the fault recording devices produced by domestic and foreign power equipment companies use unilateral current and voltage signals, and the mathematical model used is an algebraic equation describing the steady-state process, which has defects in principle and cannot eliminate the transition resistance. Therefore, the existing fault analysis ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/08
CPCY04S10/522Y04S10/52
Inventor 陈允平龚庆武肖文峰
Owner WUHAN UNIV