Boosting DC/AC Ratio of PV Plant for BESS Integration on DC side

Abstract

This paper analyzes the benefits and considerations of Battery Energy Storage System integration with a Photovoltaic power plant, directly on the DC side of the solar system. By boosting the DC/AC inverter ratio is expected to increase the flexibility of the Photovoltaic power plant, allowing production output over periods with no sun, as well as other BESS typical services, such as renewable time shift, peaking capacity and frequency response. The inverter runs at full power when energy is the most valuable. However, it will be analyzed that oversizing only improves project technical performance as well as up to a certain point, the economics, by comparing the total energy production [MWh/y], energy available on DC side and energy available on AC side.