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建立了三相三线制有源滤波器的数学模型,在此基础上提出采用PI调节与电压前馈相结合的控制方案,同时采用SVPWM算法对变流器进行调制以使有源滤波器有较为优越的动态补偿效果。详细阐述了PI调节与电压前馈相结合的控制原理,给出了三相三线制变流器的电压空间矢量脉宽调制技术(SVPWM)的实现方法。在Matlab/Simulink环境下建立了基于以上控制策略和调制方案的三相三线制有源滤波系统仿真模型,进行了仿真分析且验证了该方案的有效性。
The mathematical model of three-phase three-wire active filter is established. Based on this, a control scheme combining PI regulation and voltage feedforward is proposed. At the same time, SVPWM algorithm is adopted to modulate the converter to make the active filter more Superior dynamic compensation effect. The control principle combining PI regulation and voltage feedforward is expounded in detail and the realization method of voltage space vector pulse width modulation (SVPWM) of three-phase three-wire converter is given. In the Matlab / Simulink environment, a three-phase three-wire active filter system simulation model based on the above control strategy and modulation scheme is established, and the simulation analysis is carried out to verify the effectiveness of the scheme.