四桥臂并联型有源电力滤波器控制研究

Research of Four-Leg Shunt Active Power Filter Control Method

针对三相四线制电力系统谐波治理,提出了一种四桥臂并联型有源电力滤波器(SAPF)谐波补偿改进控制方案。谐波电流跟踪控制采用三维空间矢量调制算法,SVPWM具有直流电压利用率高、电流畸变率小等优点;直流侧总电压稳定,采用模糊PI自适应控制,直流侧电压动态响应快,超调小。对SAPF直流侧上下电容电压值平衡控制进行了研究。通过仿真验证了该控制方案的正确性与可行性。

For three-phase four-wire power system harmonic control, a parallel four-leg shunt active power fil- ter （SAPF） harmonic compensation to improve control programs was given. The harmonic current tracking control uses three-dimensional space vector modulation algorithm, SVPWM has a high utilization of DC voltage and small current distortion rate, the total DC voltage is stable, fuzzy PI adaptive control is used, DC voltage has fast dynamic response and small overshoot. The balance control between the upper and lower capacitor voltage value on SAPF DC side was studied. The simulation results show the correctness and feasibility of the control scheme.