Research on operation optimization strategy of grid-connected PV-battery system

The optimization strategy is proposed for the grid-connected PV-battery system in order to gain the maximum benefit. The proposed operation optimization is performed in two steps. In the first step, active power optimization is applied, which is aimed at the minimum operation cost (or the maximum system benefits). In the second step, reactive power optimization is applied based on the result of active power optimization, aimed at the minimum network loss. The charge-discharge cycle constraints and power limit constraints are considered in the battery model. IEEE-30 network is used for case study. Two kinds of electricity price schemes are used to examine the effect of the proposed operation optimization strategy.