66kV distribution network earth fault monitoring and diagnosis system

• Main Authors: QIU SHI, LIU NAN, LI YUANFENG
• Format: Patent
• Language: English
• Published: 29.04.2015
• 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 relates to a fault line detection device for a power system, namely a 66kV distribution network earth fault monitoring and diagnosis system. The 66kV distribution network earth fault monitoring and diagnosis system comprises a center controller and a signal conditioning machine; when the 66kV system is earthed, a line where earth fault occurs is accurately diagnosed under the condition that a transition resistance is a certain numerical value. The 66kV distribution network earth fault monitoring and diagnosis system has the benefits that the earth line name can be quickly and accurately selected out when a power distribution network is subjected to single phase-to-earth fault, so that the grid abnormal running time is shortened; the earth fault line can be cut according to the site operation requirements, so that the safe operation of a non-fault line is guaranteed, and the power supply reliability, the safety, the economy and the continuity of the power distribution network are radically improved. The 66kV distribution network earth fault monitoring and diagnosis system has remarkable economic benefit and social benefit.