带状态观测的储能系统增广状态反馈离网控制

Islanded Operation Strategy for Power Control System Based on State-feedback Integral Control With State-observer

为提高储能系统(PCS)的离网控制性能,提出一种带状态观测器的储能系统增广状态反馈离网控制策略。状态观测器可准确观测PCS输出电压和电流,基于带增广矩阵的状态反馈控制器通过增加一个状态量,使状态方程增加一阶,可提高控制系统的稳态性能,实现无稳差跟踪控制。仿真和实验结果表明该控制策略与传统的比例积分(PI)控制相比,控制快速、准确,在负载切换时系统仍能保持很好的稳定性且无超调现象。

An island operation strategy based on a state observer and feedback is developed to improve control performance of power control system（PCS ）.The state observer can observe the voltage and current precisely.By increasing a state variable, the state-feedback integral controller can improve the steady-state performance and implement the control with zero-steady-state error.Simulation and experimental results show that the controller gives faster ,more accurate results than traditional proportion-integral （PI） controllers.The system is shown to remain stable and smaller overshoot when loads switching.