基于PSCAD的电力系统次同步谐振研究

次同步谐振（SSR）问题是由串联补偿输电网络形成的电气谐振回路的固有频率与汽轮发电机组轴系扭振固有频率互补时（其和等于同步频率）引起的。主要研究了由串补电容引起的SSR的频域分析方法的验证与研究，用到的两种方法分别是电磁暂态时域仿真法（PSCAD／EMTDC）与基于时域仿真实现的复转矩系数法（测试信号法）。采用的技术路线为两步：首先在PSCAD／EMTDC平台上建立IEEE第一标准测试系统模型，然后在所建模型上，对所采用的频域分析方法——测试信号法和时域仿真法进行对比与校验。最后对次同步谐振的防治措施及对策做了简要介绍。

Study of Subsynchronous Resonance in Power System Based on PSCAD

If the resonant frequency of series compensated transmission network and the natural frequency of turbine-generator shaft complement each other(the sum is equal to synchronous frequency),it may result in subsynchronous resonance(SSR).The verification and research of SSR frequency-domain analysis methods are carried out.The two methods used are electromagnetism transition condition simulation method in the time domain(PSCAD/EMTDC) and the complex torque coefficient method realized by time-domain simulation b...