In the view of voltage quality problems due to uncertainty of photovoltaic power output

a kind of method of coordinative operation of photovoltaic-storage and DSTATCOM systems is proposed.Furthermore

a multi-objective optimization model with DSTATCOM capacity allocation and setting is set up and the parameter setting issue in the DSTATCOM operation is considered during the process of capacity allocation.With whode-day network loss and DSTATCOM allocation capacity as optimization objectives and on the baisis of NSGA-II

the pareto solution set is obtained do to provide decision basis for DSTATCOM capacity allocation and parameter setting.It is shown by the calculation example of IEEE 33 node distribution power network that this method can optimize and allocate DSTATCOM capacity and have remarkable result in the improvement of system voltage quality and loss reduction.