EHV line protection method with integration with traveling wave ranging function

Abstract

The present invention discloses an EHV line protection method with the integration with a traveling wave ranging function. The method is characterized in that a traveling wave CPU is added to an existing EHV line protection device, a current transformer is used to measure current traveling wave, and a traveling wave CPU is used to collect failed traveling wave data to carrying out traveling wave ranging. The traveling wave CPU comprises a traveling wave MCU, and a high speed data collection circuit. The traveling wave CPU is connected to the high speed data collection circuit. The high speed data collection circuit is used for recording the failed traveling wave data. The traveling wave CPU is used for analyzing and processing the failed traveling wave data from the high speed data collection circuit. According to the method, the functions of traveling wave ranging and line protection are fused in one body and are integrated into the EHV line protection device, substation resource allocation is greatly optimized, and the economic efficiency of substation investment is improved.

Description

technical field [0001] The invention relates to an ultra-high voltage line protection method integrating traveling wave ranging function, and belongs to the technical field of electric power system automation. Background technique [0002] At present, the fault location of most substations still relies on the distance measurement module of the line protection device itself, but the distance measurement principle of line protection based on steady-state quantities is affected by various factors, resulting in large errors in distance measurement accuracy and poor adaptability. Traveling wave ranging can accurately locate line fault points, greatly reduce the workload of line inspection, shorten fault repair time, and improve power supply reliability. It has entered engineering applications, but in addition to configuring line protection devices in current substations, it also needs An additional set of traveling wave distance measuring device is configured, the line protection...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that existing substations mainly rely on the ranging module of the line protection device. The ranging accuracy is poor and the applicability is not strong. A method for protecting ultra-high voltage lines with integrated traveling wave ranging functions is proposed.

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