The invention discloses a distribution network fault line
selection method based on a zero sequence current variable quantity
waveform correlation coefficient matrix. According to the distribution network fault line
selection method disclosed by the invention, a row off-
diagonal element of each feeder zero sequence current variable quantity
waveform correlation coefficient matrix and feeders in minimum corresponding before and after switching of a parallel resistance are utilized to carry out line selection for a fault line principle; and zero sequence
voltage of a distribution network
bus is larger than 15% phase
voltage, the parallel resistance is switched by keeping
arc suppression coil parameters invariable, a zero sequence current sampling value of each feeder flowing before and after switching of the parallel resistance is measured, the zero sequence current variable quantity
waveform correlation coefficient matrix is further calculated, and the row off-
diagonal element of each feeder zero sequence current variable quantity waveform
correlation coefficient matrix and the feeders in minimum corresponding are selected as fault lines. With the adoption of the method, a line selection result is not influenced by factors such as transition resistance, line parameters,
line length, distribution network running mode and fault position, the line
selection principle is simple, and the line selection result is high in reliability and strong in practicability.