T-type power transmission line fault locating method and system

• Main Authors: GAO HUIMIN, SHEN KAIYI, NIU YIGUO, GAO YUNHUI, XIE LIWEI, WU XIANGGUO, WANG XUSHENG, JIAO JIAN, LIU XIUJUN, GAO XIAOGANG, ZENG XIANGJUN, XU JIANG, QU JIANXU, XIE XIAOYING
• Format: Patent
• Language: Chinese; English
• Published: 15.06.2018
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention provides a T-type power transmission line fault locating method and system. The method comprises the following steps: a step of respectively acquiring time at which a zero-mode componentand a line mode component of a fault traveling wave reach a first end, a second end and a third end of the T-type power transmission line; a step of using a preset algorithm model independent of wavespeed; a step of determining first distances that a fault point covers so as to reach the first end, the second end, and the third end based on the time at which the zero-mode component of the faulttraveling wave reaches the first end, the second end and the third end; a step of respectively determining second distances which the fault point covers to reach the first end, the second end and thethird end based on the time at which the component of the fault traveling wave reaches the first end, the second end, and the third end respectively; a step of calculating values of difference betweenall the first distances and