New scheme on reclosing phase by phase for double-circuit transmission lines on the same tower

• Published in: Dianli Xitong Baohu yu Kongzhi Vol. 36; no. 5; pp. 22 - 25
• Main Authors: Liu, Jia-Jun, Liang, Zhen-Feng, Zhang, Xin-Wei, Wang, De-Yi
• Format: Journal Article
• Language: Chinese
• Published: 01.03.2009
• ISSN: 1674-3415

Based on the conception, a new scheme on reclosing phase by phase for double-circuit transmission lines on the same tower is proposed in this paper. The characteristics and the negative factors of the automatic reclosing for double-circuit transmission lines are analyzed firstly. And then, a new scheme on reclosing phase by phase is presented. The new one adopts different tripping strategy towards various faults, which ensures single loop in operation during cross-country fault occurrence as far as possible. Meanwhile, the breaker action after oscillation end is discussed. The scheme can both enhance the inter-connection between systems connected by the double-circuit transmission lines during the fault and reduce the surge brought by permanent fault reclosing.