Power flow control and MPPT parameter selection for residential grid-connected PV systems with battery storage

This paper presents a technique to control power flow and a selection of MPPT parameter for grid-connected PV systems with battery storage in order to optimize the use of PV energy in the residential level. The power processor used in such PV systems have to allow the power to flow in all possible directions among 3 elements; PV array, battery and utility grid. Furthermore, to maximize the use of PV energy, the maximum power point (MPP) should be maintained for all conditions. A small PV system has been set up to validate the 3 proposed energy management strategies. The experimental results show the success of power flow control for various control conditions and also illustrate the charge/discharge profile that the battery will be subjected to.