Flexible DC power distribution network fault positioning method

• Main Authors: WANG XIAOHONG, HONG FENG, ZHENG XIAOJIANG, WU TONGHUA, ZHENG KUNCHENG, DAI WEI, JIANG YUAN, HU ZILONG, YAO GANG, ZHENG YUPING, LI XINDONG, CHEN GUOZHOU, HOU XIAOFAN
• Format: Patent
• Language: Chinese; English
• Published: 27.03.2020
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention discloses a flexible DC power distribution network fault positioning method. The method is characterized by setting a DC bus protection area and a DC line protection area in a DC power distribution network, configuring the protection devices for the switches in the DC bus protection area and the DC line protection area, and connecting all the protection devices through a high-speed communication network; when the differential protection is normal, adopting the differential protection for fault positioning, and when the differential protection exits, adopting a comprehensive faultpositioning method based on the multi-point direction for fault positioning. According to the invention, the problem that the time delay of the networked protection actions applied to the direct-current power distribution network is longer, is solved; the problem that the DC power distribution network loses the backup protection when the differential protection is abnormal and cannot work is solved; and the problem that