Detecting and positioning method of bus coupler flashover fault in subway alternating current power system

• Main Authors: LIU YONGSHENG, YAN WEI, NIU HONGHAI, CHEN JUN, SHEN QUANRONG, WEI WEI
• Format: Patent
• Language: Chinese; English
• Published: 27.11.2013
• 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 invention discloses a detecting and positioning method of a bus coupler flashover fault in a subway alternating current power system. The method comprises the following steps: (1) all protection devices configured in a single power supply zone in the subway alternating current power system is connected to a unified GOOSE network, and the protection devices connected with the GOOSE network are provided with a GOOSE network communication capability; and (2) a bus coupler protection device performing fault detection and location inside each transformer substation realizes a decision logic, and when all the decision logics are met, the bus coupler protection device determines that the a bus coupling protected by the bus coupling protection device has a flashover fault and the bus coupler protection device alarms. The method of the invention can rapidly detect and locate the flashover fault point after the bus coupler flashover fault happens, so that the operating maintenance personnel can quickly restore the