Active-reactive Power Coordinated Optimization of Distribution Network with Photovoltaic Based on PSO-CSA Algorithm

The grid-connected of the energy storage system (ESS) makes the optimization of the distribution network not only limited to the unilateral reactive power optimization, but can be controlled and optimized by the active power-reactive power coordination with better effect. In this paper, the reactive power of distributed photovoltaic (DPV), the switching capacity of parallel capacitor banks, and the charging and discharging power of the ESS are used as control variables, the minimum network voltage deviation and active network loss are utilizes as the comprehensive optimization indicators to design the objective function. By adding the node voltage violation into the objective function in a form of penalty function, an active-reactive power coordination optimization model of the distribution network with DPV is established. The PSO-CSA algorithm is used to solve the optimization model, and the modified IEEE-33 node power distribution system is simulated to verify the feasibility of active-reactive power coordinated optimization.