Distribution network fault positioning method based on network structure matrix

• Main Authors: FAN JIWEI, LI XIN, GUO KANGNING, JIN TAO, WANG JIYOU
• Format: Patent
• Language: English
• Published: 16.09.2015
• 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 discloses a distribution network fault positioning method based on a network structure matrix. The method comprises steps: according to a distribution network structure in a positioning region, a distribution network topology matrix D for reflecting an adjacency relationship between a feeder line section and each node; according to current monitoring data acquired by a line measurement device corresponding to each node, a measurement column vector G is generated; each row element of the distribution network topology matrix D and an element of the measurement column vector G are multiplied respectively according to a bit, a fault positioning matrix F is obtained according to the multiplication result; and finally, according to the fault positioning matrix F, whether short circuit fault or ground fault happens to each feeder line section is judged. Through one-time calculation of the network topology matrix and the measurement column vector, the fault region can be positioned directly, the method is simple, the calculation amount is small, the speed is fast, favorable conditions are created for timely finding out and cutting fault lines, and distribution network operation stability and power supply reliability are improved.