ABSTRACT
India’s energy consumption is growing rapidly. By 2020s India would become largest energy consuming nation by surpassing china. To fulfill this rapid load demand government of India has taken many energy initiatives, which increase power generation capacity. India has 356 gigawatts (GW) installed power generation capacity, which makes India fifth largest producer of energy in the world. Renewable sources give best solution of power generation to meet economical as well as environmental constraints. India ranks fifth overall for installed renewable energy capacity, fourth for 34.98GW wind power and fifth for 24.3 GW solar power as of October 2018. By nature, solar and wind energy are intermittent and unpredictable, their high penetration could cause large impact on load especially in weak grids or stand alone system. For proper balance between generation and load there is requirement of enough storage capacity. In the hybrid system, two renewable resources are combined into an optimized mix to counteract the effect of the intermittent existence of solar and wind energy, making the overall system more economical and efficient to operate. The power electronics interface gives the necessary security; flexibility and reliability of operation of hybrid wind and solar PV system. In power system non-linear and unbalanced loads causes serious power quality problems in hybrid system. This paper examines the various power quality problems, steps involve in power quality problem evaluation and reviews different control strategies developed in the literature for the power quality improvement in hybrid wind and solar PV system. A comparison of different control methods is also presented with necessary suggestions for future research work.
