Precisely Positioning method and device for power transmission line fault using multiple terminal signals

• Main Authors: QINGWU GONG, YUNPING CHEN, NAIQIU SHU
• Format: Patent
• Language: Chinese; English
• Published: 11.02.2004
• 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

The multiple-terminal signal process of positioning fault in power transmission line includes the following steps: realizing sync sampling of multiple-terminal voltage and current signals of power transmission line with GPS; recording and exchanging the electric quantities before and after fault to obtain required data for positioning fault; obtaining the accurate position of the fault point via judging the sort of the fault and precise positioning. The fault positioning device for power transmission line includes voltage converter, current converter, GPS signal receiver board, data acquisition card and industrial control computer. The present invention can position fault in power transmission line precisely and in high robustness. 本发明涉及一种采用多端信号的输电线路故障定位方法，包括以下步骤：一、利用GPS实现输电线路多端的电压、电流信号同步采样；二、记录并交换故障前后的电气量以获得故障定位所需数据；三、故障定位以获得故障点准确位置：1)判断故障相别，2)精确故障定位。本发明还提供了一种输电线路故障定位装置，包括电压变换器、电流变送器，GPS信号接收板，数据采集卡及工业控制计算机。本发明可对输电线路上发生的故障进行定位，其定位精度高，定位误差受各种因素的影响很小，具有非常好的鲁棒性。