摘要
本文应用EMTP程序分析了500kV串补输电系统的次同步谐振问题,计算了500MW汽轮发电机组的自振频率、振型和电网的频率阻抗特性,并有针对性地计算了系统各种运行状态下的机组轴系扭矩。计算结果表明,该系统在单机运行、补偿度为50％时将发生次同步谐振。
In this paper, subsynchronous resonance of a 500kV series compensated transmisson system is studied by EMTP programs. And the calculations are performed for a 500MW turbine generator shaft system natural frequencies and mode shapes, the reactance and resistance versus frequency response characteristic of practical equivalent network are calculated also. In the light of this case, turbine generator shaft torsional torques are computed. It has been shown that the transmission system can present suhsynchronous resonance under such an occasion as single generator running with 50% compensation.
关键词
电力系统
同步谐振
补偿度
计算
power system computation, subsynchronous resonance, series capacitor compensation, EMTP program
