多机系统中TCSC设备与发电机励磁的分散协调控制

Decentralized coordinated control of TCSC and excitation in multiple machine system based on robust control theory

为在含有可控串联补偿器 (TCSC)设备的多机电力系统中实现 TCSC与励磁的分散协调控制 ,通过建立 TCSC与多机系统综合动态模型 ,并考虑了系统可能受到的干扰情况 ,在反馈线性化和 H∞ 控制理论的基础上 ,构造出关于TCSC和励磁的分散非线性鲁棒协调控制律 ;并以一个六机系统为例说明了上述控制律在电力系统中的应用 ,仿真结果表明 ,该控制律能明显提高系统的暂态稳定性 ,提高输电线路的输电能力 ;由于控制信号实现了本地化 ,避免了远距离信号传输 。

This paper analyzes the decentralized coordinated control of excitation in a multimachine excitation system equipped with thyristor controlled series compensation (TCSC). The model includes all the dynamic processes of the generators and the TCSC. Disturbances are also included in the model. A decentralized nonlinear robust coordinated control law is developed based on the model by employing direct feedback linearization and H ∞ theory. Simulation of a six machine power system shows that the transient stability of the power system is obviously improved. In addition, the power transfer capacity of the long distance transmission lines is enhanced. The control law has engineering practicality since the variables can be measured locally.