Fault locating system of power distribution network

• Main Authors: LI LISHENG, SUN YONG, SHAO ZHIMIN, LI JIANXIU, ZHANG SHIDONG
• Format: Patent
• Language: Chinese; English
• Published: 27.08.2014
• 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 utility model discloses a fault locating system of a power distribution network. The fault locating system comprises a substation terminal, multiple line terminals and a main station, wherein the substation terminal is mounted on a bus, and used for detecting transient zero-sequence voltage, determining transient zero-sequence voltage direction and transmitting detection results to the main station; the multiple line terminals are respectively mounted on different branches of the power distribution network, and used for detecting transient zero-sequence current, determining transient zero-sequence current direction and transmitting detection results to the main station; the main station compares the received transient zero-sequence voltage direction with the received transient zero-sequence current direction to determine a line section with earth fault; and the substation terminal and the line terminals are wirelessly communicated with the main station. The fault locating system is high in the determining