If a significant portion of the power is generated by renewable sources, power electronic equipment plays a significant role in power quality problems of integrated systems. This essay examines the prerequisites for a seamless integration of HRES into the grid. When HRES are connected to the grid, it primarily focuses on the examination of DC/DC converters, inverters, control methods, and power quality issues. Each methodology or procedure is thoroughly explained along with its benefits, drawbacks, and potential applications.