建立了两区互联电力系统模型,分析了静止同步串联补偿器(SSSC)负荷频率控制的原理.SSSC频率控制器采用一阶控制环节,并通过超前滞后补偿进行校正.对两区互联系统线性化处理推出系统的状态方程,利用重叠分解对系统进行解耦求得控制系统阻尼比来设计SSSC频率控制器的目标函数,并通过改进遗传算法对控制器参数进行优化.仿真结果验证了采用SSSC频率控制器对减少频率波动的峰值和抑制区间低频振荡的有效性.%A model of two-area interconnected power system is established to analyse the theory of static syn chronous series compensator (SSSC) in load frequency control. The SSSC frequency controller uses a first-or der controller, which is equipped with a lead-lag compensator. The state equation of system is derived based on the linear processing of the two-area system. By using overlapping decomposition to decouple the control sys tem to obtain the damping ratio of the control system, the objective function of the SSSC frequency controller can be designed. Then the controller parameters are optimized by using the improved genetic algorithm. The good performance of the system obtained from simulation demonstrates that the SSSC frequency controller can not only reduce the peak of frequency fluctuation, but also can damp out inter-area low-frequency oscillation ef ficiently.
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