Harmonic Elimination of D.C to A.C Converters Using Embedded Design Techniques

Abstract

This paper develops an efficient scheme to eliminate harmonics in D.C to A.C converters (inverters). The main advantages of the proposed method are its simplicity and high flexibility to adapt the pulse width according to the target. The proposed approach utilized embedded design techniques to construct a dual-processor system with a distributed memory model to be configured on Spartan-6E Field Programmable Gate Arrays (FPGAs) slice. The designed system is programmed to generate pulse width modulation (PWM) signals to drive PWM inverter suitable for Photovoltaic (PV) system. The duty cycle of the pulses produced by the designed system can be varied and optimized to reduce the distortion in the output waveform of the inverter circuit. The generated signals are applied on a prototype inverter circuit in real-time operation. The system performance is simulated using MATLAB -Simulink environment. From simulation results, it was found that the proposed system yields harmonics distortion as low as 3.85% at the inverter circuit output. The real-time inverter output matches very accurately the simulation results.