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High-accuracy failure wave-recording device and its transmission line combined failure distance-measuring method

A fault recorder and transmission line technology, applied in the field of power systems, can solve the problems of poor reliability of distance measurement and failure to give the actual distance of transmission lines, etc.

Inactive Publication Date: 2002-09-04
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the background machine only adopts the impedance fault location algorithm of steady-state power frequency fault information; -11 only has the function of traveling wave ranging, but the reliability of ranging is very poor), and it cannot accurately and reliably give the actual distance after the fault of the transmission line

Method used

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  • High-accuracy failure wave-recording device and its transmission line combined failure distance-measuring method
  • High-accuracy failure wave-recording device and its transmission line combined failure distance-measuring method
  • High-accuracy failure wave-recording device and its transmission line combined failure distance-measuring method

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Embodiment Construction

[0054] Embodiment of a kind of high-precision fault recorder designed by the present invention figure 1 As shown, now combined with this figure, the detailed description is as follows:

[0055] It consists of a front-end computer, a background industrial computer, a power system synchronous clock, and a printer.

[0056] Among them, the front-end processor is used for real-time collection of steady-state power frequency current, transient traveling wave current, steady-state power frequency voltage, transient traveling wave voltage, and high-frequency signals and switching values ​​used in high-frequency protection. The system synchronous clock is connected;

[0057] Among them, the background industrial computer is used to record, store, and display fault waveforms and fault data, calculate the fault distance of transmission lines, and perform fault analysis. It is connected to the front-end computer and printer;

[0058] The power system synchronous clock provides precise ...

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Abstract

The present invention belongs to the field of power system, including four portions of topping machine, background machine, power system synchroclock and printer, in which the topping machine includes steady-state voltage and current collecting unit, transient voltage and current collecting unit, high-frequency collecting unit and GPS (global navigational satellite timing and distance-measuring system) time synchronization unit which can be used for providing accurate time mark and interfaced with power system synchroclock. The background machine adopts industrial control computer for fault data analysis and processing, the power system synchroclock is used for providing accurate time information and the printer can be used for printing fault record and fault distance-reasuring result.

Description

technical field [0001] The invention belongs to the field of electric power systems, and in particular relates to fault waveform recording and fault analysis of electric power systems. Background technique [0002] The fault recorder is an automatic device that is put into operation all the year round to monitor the operation status of the power system. By analyzing the information recorded by the fault recording device, fault information such as fault phase difference, current and voltage amplitude, action behavior of relay protection devices, and switching times can be determined. Thereby improving the configuration of the power system, so that the power system has the greatest reliability. The development and promotion of technologies such as ultra-high voltage and long-distance power transmission have made the safe and stable operation of the power system face higher challenges. After a line fault occurs, quickly and accurately find the fault point, shorten the fault p...

Claims

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Application Information

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IPC IPC(8): G01R31/08
Inventor 董新洲
Owner TSINGHUA UNIV
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