Method for reproducing power transmission line fault current traveling waveform based on multiband decomposition

• Main Authors: WANG XIAOCONG, LIU YADONG, LIANG HANQING, JIANG XIUCHEN, HU CHENLIN, SHENG GEHAO
• Format: Patent
• Language: Chinese; English
• Published: 09.11.2016
• 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 method for reproducing a power transmission line fault current traveling waveform based on multiband decomposition. The method is characterized by installing a fault traveling wave detection device on a power transmission line, setting an objective function based on a frequency-dependent model by virtue of a least square method according to fault point current traveling waves detected at two points, and obtaining a distribution parameter of the power transmission line by virtue of inversion by using a genetic algorithm which is an intelligent search algorithm; verifying the correctness of the distribution parameter by means of inversion of detection point waveform of another section of the same power transmission line and comparison, and accurately obtaining the fault current traveling waveform of any unknown point on the fault power transmission line via inversion by mean of the inversion method. The method has an absolute error not more than 3[mu]s and a relative error not more tha