Control of Injection Type Hybrid Active Power Filter

Whether a hybrid active power filter results in desirable harmonic eliminating effect, mainly depends on current tracking performance of the controller. By modeling a new injection type hybrid active power filter, this paper proposes a new synthesis control method which combines the speedy performance of traditional hysteretic control with the zero steady state error of proportional-resonance integrators. With this new control algorithm, this paper takes some simulations and experiments to verify its effects, and compares with traditional hysteretic control and the one just using proportional-resonance integrators in the aspects of tracking speed, control precision, harmonic components and the energy loss of switching. The method for theoretical analysis and relative conclusion presented in this paper can be used as references to design current tracking controller for other type hybrid active power filter.