Simulation Of Parallel Active Power Filter

In this thesis,the power electronic equipment as a load to the power grid to bring the harmonic problem,to suppress the power grid harmonic three-phase three-wire parallel active power filter design and simulation,analysis of the two core technologies,namely,harmonic current Detection methods and control methods.In this thesis,the detection method based on instantaneous power theory is used as harmonic current detection method.The control method includes the current tracking control method and the DC side voltage control method.The former method uses two methods: hysteresis control and triangular carrier comparison control.A current estimation based control strategy is proposed for the problem of parameter adjustment and time delay caused by the traditional current tracking method.Then the mathematical model and the calculation method of the main circuit of the three-phase three-wire parallel active power filter are analyzed.Based on MATLAB R2011 a / simulink,the classical triangular carrier control strategy and current predictive control strategy are simulated to verify the correctness and effectiveness of the proposed method.