A review on the prospects of electric vehicles to improve the dynamics of renewable energy rich power system

Abstract

Energy is one of the key requirements for development of industrial and commercial sectors in the country. With the increased demand of energy and faster depletion of conventional energy sources like petroleum extracts, the alternative solutions to retain the reserves are increasing Energy Efficiency and integration of renewable energy sources. World action plans with respect to CO2 mitigation and climate change has a remarkable action in cutting down of coal and gas based conventional power generation. For a sustainable development, the penetration of renewable energy sources to the power grid has a commendable increase in the past five years and will continue as such. With the increased tying of renewable energy sources such as solar and wind has resulted in attachment of more power converters to the power system leading to power system stability issues. Frequency instability including larger Rate of Change of Frequency (ROCOF) and reduction of system inertia are addressed. The Battery Energy Storage System (BESS) seems to be a feasible solution. Also the most economical option to realize BESS would be to consider the batteries attached to Hybrid solar PV (SPV) systems tied to grid and also the batteries attached to Plug in Electric Vehicles (PEV).The battery state of charge (SOC) balances the load curve as and when required ensuring minimized ROCOF leading to a reliable and stable power system with higher share of renewable energy.