同步调相机对系统频率特性的影响研究

Study on Influence of Synchronous Condensers on System Frequency Characteristics

随着电网中直流馈入功率的增加,国家电网目前通过加装同步调相机来提供电压支撑,降低直流换向失败的概率,但是国内鲜有关注同步调相机在新能源替代传统能源时改善系统动态频率特性方面所能担负的重要作用。首先阐述同步调相机与电网互动原理,然后仿真研究同步调相机对系统频率的改善作用。此项研究对微网中的频率特性研究与控制和未来含有高比例非同步电源的主干电网规划运行也有参考意义。

With the increase of HVDC infeed power in the power grid,the State Grid now are installing synchronous condensers to provide voltage support and reduce the probability of DC commutation failure.However,less attention has been paid to the important role that synchronous condensers can play in improving the dynamic frequency characteristics of the system when renewable energy replaces traditional energy.In this paper,firstly,the principle of interaction between synchronous condensers and the power grid is described,and then a simulation study on the improvement effect of synchronous condensers is carried out.This research also has reference significance for the study and control of frequency characteristics in microgrids and the planning and operation of main grids with high proportion of non-synchronous power sources in the future.