A study on the Optimal Re-closing Time to Improve Transmission Capacity of Power System
There is an optimal re-closing time (ORT) for all transmission line, no matter the instantaneous or permanent faults. Based on the transient energy function (TEF) theory with classical models considered, the ORT can be calculated accurately. This paper mainly focuses attention on the validity and practicability analyzing of ORT obtained from this method. The characteristics and influencing factors of the ORT are put forward and analyzed, and also the setting strategy of re-closing time for transmission line is presented. Further more, it will conduct simulations with a complex real system of China North Grid. Simulation studies show that this technique can significantly increase the security margin and damp the oscillation of the power system. It is indicated that the variation of ORT of a certain transmission line is insensitive to following influencing factors: the fault location, fault clearing time and pre-fault power flow. Also the influence of equipment maintenance condition is verified. Finally, the setting scheme is drawn to optimize the re-closing time of the key transmission lines in the network under current technological conditions.
Optimal re-closing time (ORT) system stability transient energy function automation re-closure device
P. Li B. H. Zhang Z. G. Hao Z.Q. Bo A. Klimek Y. F. Rao Y. T. Wang
School of Electrical Engineering,Xian Jiaotong University,China AREVA T&D Automation,UK
国际会议
2008 China International Conference on Electricity Distribution (CICED 2008)(2008中国国际供电会议)
广州
英文
1-7
2008-12-10（万方平台首次上网日期，不代表论文的发表时间）