分相重合对轴系扭振和系统运行稳定性的影响研究

STUDIES ON THE EFFECT OF UNSIMULTANEOUS RECLOSURE ON T G SHAFT TORSIONAL TORQUES AND POWER SYSTEM TRANSIENT STABILITY

分析计算了高速重合闸引起的汽轮发电机组轴系扭力矩，指出对于永久性故障的重合可能导致扭力矩的放大，并且重合时刻不同对扭力矩影响很大．在此基础上提出了对三相重合闸“分相重合”的新思想．研究表明，这种方法既可以大大削弱重合不成功引起的扭力矩。

In this paper, torsional torques of turbine generator shaft induced by high speed reclosure (HSR) are calculated and analyzed. It can be seen from the results that shaft torsional torques may be aggravated when reclosing to permanent faults and the reclosing time has significant effects on shaft torsional torques. This paper also presents a new method “unsimultaneous reclosure” for three pole reclosing. The proposed method can greatly reduce the torsional torques in the case of unsuccessful reclosure and improve the transient stability of power system.