SINGLE-PHASE INVERTER CONTROL TECHNIQUES FOR INTERFACING RENEWABLE ENERGY SOURCES

A novel current control technique is proposed to control power flow from a renewable energy source feeding a microgrid system through a three-phase parallel-connected inverter. The parallel-connected inverter ensures that the power flow from the grid with low-current total harmonic distortion even in the presence of nonlinear load. The renewable energy sources are paralleled, and the average of this constant supply is given to Booster circuit and is used to improve the power level of renewable energy sources. The current controlled voltage source inverter is used to convert DC supply into AC supply. The CCVSI is controlled by PWM techniques and the current flows are controlled. A p–q theory-based approach is used to find the reference current of the parallel-connected converter and the stability of the proposed controller is ensured by direct Lyapunov method. By applying this concept, selected harmonic can be eliminated, and the output voltage THD can be improved. The proposed project is to be simulated by using MATLAB and the results are to be compared with experimental setup. The PIC microcontroller is to be used for generating required pulses to the parallel inverter. KEYWORDS: