A DSP-Based Active Power Filter Rooted on Energy Balance Concept

The object of this paper is to design a single phase digital active power filter, which adopts an energy balance concept to simplify the control method. Only one current sensor and two voltage sensors are needed to detect the input current, the input voltage and the DC bus voltage. The digital signal processor controller is used to implement the simple PI control method. The proposed method provides both harmonic suppression and power factor correction. Finally, the feasibility of the proposed control method is verified from PSPICE simulation and experimental results.