基于瞬时无功理论的并联型有源滤波器恒功率控制

Constant Power Control For Shunt Active Filter Based on Instantaneous Reactive Power Theory

针对有源滤波器谐波电流检测的复杂性以及响应延迟,根据瞬时功率理论,提出了并联型有源滤波器恒功率控制策略。该控制策略通过实现逆变器有功功率和无功功率的解耦,分离出待补偿的功率分量,采用空间矢量调制算法,实现系统的恒功率控制。通过Matlab/Simulink进行仿真验证,结果显示该策略可以有效抑制系统交流侧谐波电流,补偿无功功率,输出稳定的有功功率,改善系统稳态性能,证明了该策略的正确性和有效性。

In view of complexity and response delay of shunt active filter harmonic current detection, constant power control for shunt active filter is introduced based on instantaneous power theory. Through the inverter active power and reactive power decoupling, separates the compensated power component and applies the space vector modulation algorithm to realize system constant power control. The Matlab/Simulink simulation shows that the strategy is effective on inhibiting AC harmonic current, compensating reactive power, outputting stable active power as well as improving the system steady-state performance, which verifying the control correctness and validity.