This paper investigates the optimum dimensioning of a battery energy storage in a grid-connected PV system. An energy flow decision program of the system was developed, in the MATLAB to minimize the operatingcost of the system. Optimizing the energy flow schedule was performed under two different energy flow control strategies: 1) The battery energy has been released to the grid, during the daytime, only up to a predefined value of the state of charge in case A. 2) The battery is allowed to discharge its energy on peak hours, even up to the minimum charge state in case B. Comparing both cases in one for one tariff scheme, case A was much beneficial to adopt, while case B generated higher financial benefits compared to case A, when incentives were given in feed-in tariff or for the battery investment cost. With one for one tariff scheme, the PV system without the battery energy storage was much more beneficial to adopt from the financial point of view, but not from the operational point of view.
Energy Storage Sizing for Rooftop Grid-Connected PV System
2017
Article (Journal)
English