Real Time DSP Implementation of Dual Digital Controllers for Shunt Active Power Filter

This paper proposes the implementation of digital controlled single phase voltage source inverter (VSI) shunt active power filter (APF) proto type which adopts the combination of dual digital control algorithms in line current harmonics suppression and power factor (PF) improvement. The proposed VSI shunt APF proto type results in reducing the line current harmonics and forces it to be pure sine wave and in phase with its voltage. The dual digital controllers proposed are: a mathematically simplified and concise artificial neural network (ANN) technique using an improved delta rule learning algorithm for extracting the harmonic components and a bandless digital hysteresis switching architecture. A digital signal processor (DSP) microcontroller (TMS320F28335) verifies the proposed VSI shunt APF proto type implementation which harnessed the proposed algorithms interaction effectively. Experimental results validates the MATLAB/SIMULINK simulation results which found to conform to IEEE 519-1992 harmonic norms.