Reactive Power Control for Grid Tied PVG System with ANN Based Transformerless Inverter

Abstract

The Rise in power demand with growing population across the world has led to the development of renewable energy sources. Amongst all the renewable energy sources PV power generation system proves to be more superior and efficient than other renewable sources. Recent innovations in transformerless inverters have proven to be efficient and reliable than conventional ones. The major difficulty in handling the transformerless inverter is the leakage currents, which is for the reason that parasitic capacitance is in between PV array and ground. This leakage current leads to several protection issues along with unstable CM voltages. Here the recommendedtransformerless inverter aimed at grid connected PV system has capability to reduce leakage currents. It also provides the required reactive power to the system to maintain constant CM voltage. To provide high quality current injection in to the grid, PR controller and fuzzy controller are used. In this study the detailed analysis of the operating modes of the H6 PV transformer less inverter system, investigation of the leakage currents and outcomesobtained in MATLAB simulation are to be presented.