New energy field station sending-out line fault location method based on electromagnetic time reversal method

• Main Authors: ZHU LIANG, LIANG YUTING, RAO HONGJIANG, LIN SHAOPENG, CHANG YONG, DENG YAQI, DONG JUN, SHU HONGCHUN, YU YONGBO
• Format: Patent
• Language: Chinese; English
• Published: 15.12.2020
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention relates to a new energy station sending-out line fault location method based on an electromagnetic time reversal method, and belongs to the technical field of power system relay protection. The method comprises the steps: setting different fault types in a new energy field station sending-out line area through electromagnetic transient simulation, extracting fault currents on the twosides to carry out Karenbauer transformation decoupling, extracting line mode currents, utilizing db4 wavelets to decompose the line mode components into a high-frequency component and a low-frequency component, selecting high-frequency d1 component to be equivalent to a current source after electromagnetic time inversion, connecting the current source to the two ends of a lossless mirror image line to supply power to the line, assuming fault points, calculating the current energy of each assumed fault point, and taking the assumed fault point corresponding to the maximum current energy as anactual fault point. Simul