Travelling time difference based power distribution network fault positioning method and apparatus

• Main Authors: XIANGJUN ZENG, YANLING ZHOU, GAN LIN
• Format: Patent
• Language: Chinese; English
• Published: 08.12.2004
• Edition: 7
• Subjects: GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ONOTHER TECHNOLOGY AREAS; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORKOPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FORIMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION,DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TESTING

In the method, feed-through line transducer is socket-connected on earth line of any capacity equipment in electric station of electric net or parlle-connected voltage division line transducer on inductor to obtain electric net abrupt signal, occuring accurate time of each abrupt signal is recorded and arrival time of abrupt signal recorded by station is collected by computer, accurate position of fault point and actual length of nonfault line is calculated by positioning computer, bus three phase voltage waveform is converted to be square wave sent to presetmodule by waveform conversion module for carrying on phase angle measurement of electric net. 本发明公开了一种基于行波时差的输电网故障定位方法及装置，在电网各变电站中任一电容性设备地线上套接穿芯式行波传感器或在电压互感器开口三角侧并接分压式行波传感器获取电网突变信号，记录每个突变信号出现的精确时刻，由定位计算机收集各变电站记录的突变信号到达时刻；定位计算机计算非故障线路的实际长度和故障点精确位置。同时波形变换模块将母线三相电压波形转换为方波输出到前置模块，可用于电网相角测量。本发明容易实施、可靠性高，可实现电网故障的高精度定位。