一种电力有源滤波器电流控制的新方法

针对电力有源滤波器存在滤波效果不够理想这一问题，并根据系统参考信号是周期变化的特点，提出了递推积分PI积分控制算法，实现对系统的无差控制。在此基础上，为提高系统响应速度，将递推积分PI控制与滞环控制有机结合，提出了复合型滞环控制方法。该方法具有计算量小、容易工程实现的特点。利用频域分析法从理论上证明了所提出的控制算法的有效性。最后，对所提出的方法和传统的滞环控制方法进行了仿真和实验研究，从快速性和控制精度2个方面进行了比较，验证了所提出的方法的可行性。

A NEW METHOD TO CURRENT CONTROL OF ACTIVE POWER FILTER

The performance of active power filter with traditional controller is not satisfactory. According to the periodic characteristic of the reference signal, this paper proposes a recursive integral PI control algorithm to reduce steady-state error. And to promote the dynamic performance of the system, a complex controller of recursive integral PI control and hysteresis control is constituted. The new control method is simple and easy to industrial application. In addition, the paper proves the validity of the new control method based on mathematic model and analytic method for frequency domain. Finally, the feasibility of the new control method is verified by simulation and experimental results.