用于次同步谐振抑制的注入模态电流的分流规律及补偿装置位置对阻尼效果的影响

Distribution Rule of Injected Modal Currents in SSR Mitigation and Effect of Compensation Device's Location on Damping Performance

该文研究用于次同步谐振抑制的注入模态电流的分流规律,并分析了补偿装置安装位置对阻尼效果的影响。首先在同步坐标下,采用运算参数计算了从电流注入点到发电机支路和无穷大电源支路的频率阻抗,从而得到注入电流中流入发电机定子分量的分流系数。在此基础上,通过计算和比较不同位置注入电流的分流系数,分析了补偿装置安装位置对阻尼效果的影响。采用仿真方法对研究结论进行了验证。

Distribution role of modal currents injected by shunt compensation devices was investigated and the effect of device＇s location on damping performance was analyzed. Firstly, the frequency impedances of the generator circuit and the infinite source circuit were analyzed in synchronous frame and the distribution coefficients of injected currents to generator stator were achieved. On this basis, the distribution coefficients corresponding to various locations of shunt compensation devices were analyzed and compared, and the effect of device＇s location on damping performance was investigated. The conclusion was demonstrated by digital simulation.