可控串联补偿的滑模PID控制器设计

Design of Iterative Sliding Mode PID Controller for Thyristor Controlled Series Compensation

为抑制电力系统中可控串联补偿装置的非线性及外部扰动影响,文中应用直接反馈线性化方法和滑模比例–积分–微分(proportional-integral-differential,PID)控制理论,设计了可控串联补偿的新型非线性控制器。利用直接反馈线性化方法对非线性模型精确线性化,采用滑模变结构理论与常规PID的复合控制策略,设计的可控串联补偿控制规律简洁,易于工程实现且鲁棒性好。仿真结果表明,与传统的控制方式相比,滑模PID控制器能有效地阻尼系统振荡,提高系统的暂态稳定性,对运行点变化也具有较好的适应性。

To suppress the influences of nonlinearity and external disturbances on power system caused by the thyristor controlled series compensation （TCSC）, by use of direct feedback linearization method and sliding mode PID control theory a new type of nonlinear controller for TCSC is designed. The direct feedback linearity method is used for accurate linearization of nonlinear model; the compound control strategy based on sliding mode variable structure theory and traditional PID control theory makes the control law for TCSC succinct, convenient to implement and possessing good robustness. Comparing with traditional control modes, the sliding mode PID controller can effectively suppress system oscillation, improve transient stability of power system, and better adapt to the variation of working point.