多机AC/DC系统次同步谐振和轴系扭振的研究

On Subsynchronous Resonance and Shaft Torsional Vibration of an AC/DC Power System with Multi-Machines

提出了系统部件的复频域等效端口导纳矩阵的概念,导出了复频域下多机AC/DC系统的网络方程,给出了任一台发电机组的综合电气阻尼的计算方法和轴系扭振的稳定判据,从而成功地将复数力矩系数法,推广应用到任意网络结构下多机交直流联合电力系统次同步谐振和轴系扭振的研究中.对一简单三机系统的分析计算,证明了本推广方法的正确性.

The concept of port equivalent conductance matrix in a complex frequency domain for the components of a DC and AC system is proposed. With this concept ,the network equations for an AC/DC power system with multi-machines are derived in the complex domain. The complex torque coefficient method has been extended to the study of shaft torsional vibrations and SSR in such a system with an arbitrary network structure. Calculations of a three-machine AC/DC power system has proved the correctness of the new approach.