IMPROVE THE FILTER OF GRID-TIDE SINGLE-PHASE INVERTER FOR ROOFTOP PHOTOVOLTAIC SYSTEMS

Abstract

Renewable energy is becoming an alternative to conventional generators in the context of increasing environmental pollution problems. Countries gradually consider photovoltaic application a necessary strategy for the sustainable development of modern power systems. However, to connect the power system or supply power to the load, the energy obtained from PV must convert through inverters. That creates problems during the connection process as frequency synchronization, and harmonics degrade power quality. This study designs a complete grid-tied single-phase inverter model to look for a high-quality inverter that can increase the quality of grid-connected power and minimize harmonics with filters. The results show that the connection voltage is kept stable with the proposed model and the power quality is improved with different harmonic sets analyzed.