Abstract: To solve the problem that the unreasonable layout of distributed photovoltaic(PV) will cause irreversible impact on the distribution network, a distributed PV optimal allocation model is proposed which considers the uncertainty of PV output. Meanwhile, the optimal access location and access capacity of distributed PV are solved by taking the maximum access capacity and the lowest network loss as the objective function. The improved sparrow search algorithm is used to solve the model,which has excellent global and local search ability and good individual update mechanism, and can find the optimal solution more quickly and accurately for such models. The simulation results of the model using IEEE-33 node distribution network show that full connection of distributed PV can be achieved through using the improved sparrow search algorithm to solve the model, network losses of the distribution network can be reduced, the power quality of the distribution network can be improved,and optimized allocation of distributed PV resources can be achieved.

Key words: distribution network, distributed photovoltaic, optimized configuration, improved sparrow search algorithm