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针对一个典型的两区域且区间联络线中间带 STATCOM的 4机电力系统 ,应用信息结构约束下的最优协调控制理论与算法 ,设计了输出反馈的线性二次型 (LQ)分散控制规律 ,得到的励磁控制器考虑了机组原有 PID自动电压调节器 (AVR)的结构约束 ,并通过在 STATCOM安装处构造一个能反映区间振荡模式的就地观测量 ,以抑制区间低频振荡。应用数字仿真研究了所得控制规律的性能 ,结果表明 ,协调控制器大大地提高了系统暂态稳定水平和区间传输容量 ,而且 ,由于采用了完全分散的信息模式和输出反馈方式 ,控制器实现代价低、可靠性高 ,易于实际应用
For a typical 4-machine power system with STATCOM in the middle of the inter-zone tie-line, a linear quadratic (LQ) decentralized control law of output feedback is designed by applying the optimal coordinated control theory and algorithm under information structure constraints. The excitation controller takes into account the structural constraints of the original AVR of the generator and suppresses the low-frequency oscillation in the interval by constructing an in-situ observation that reflects the inter-area oscillation mode at the STATCOM installation. The performance of the obtained control law is studied by numerical simulations. The results show that the coordinated controller greatly improves the transient stability and the transmission capacity of the system. Moreover, due to the completely decentralized information model and output feedback, the controller realizes the cost Low, high reliability, easy to practical application