FACTS设备与PSS之间的交互影响分析

Analysis of The Interactive Influence Between FACTS Devices and PSS

随着交直流混联电网规模的日益增加,柔性交流输电系统(FACTS)设备与其他电力系统控制器之间的交互影响对电网运行的影响亟待研究解决。通过复数力矩系数法研究了静止无功补偿器(SVC)、可控串联补偿装置(TCSC)分别与电力系统稳定器PSS联合运行时的交互影响作用。通过计算系统中含有不同控制器时阻尼转矩的变化,研究FACTS器件对系统低频振荡的影响。仿真分析表明,SVC/TCSC放大倍数值越大则交互影响越趋于正交互,PSS放大倍数值越大则交互影响越趋于负交互,为了保证系统的稳定运行,必须在两者之间找到一个平衡。

With the increasing scale of AC/DC hybrid power grid,the influence of interaction between FACTS devices and other power system controllers on power grid operation needs to be studied and solved urgently.Researching the interactive influence between SVC,TCSC and PSS by the complex torque coefficient approach.By calculating the change of damping torque with different controllers in the system,the influence of FACTS devices on the low frequency oscillation of the system is studied.The simulation results show that the larger the magnification of SVC/TCSC,the more orthogonal the interaction will be,and the larger the magnification of PSS,the more negative the interaction will be.In order to ensure the stable operation of the system,a balance must be found between the two.