The access of high power density distributed photovoltaic system may cause such problems as transient power violation

voltage violation and voltage flicker etc and

at the same time

the harmonic pollution caused by large-scale disorderly access of photovoltaic inverters and other power electronic devices often causes harmonic super position between different nodes and specified numbers of harmonic resonance

making diversification of the power quality problems. Therefore

the effective measures to solve this kind of power quality problem are the allocation of energy storage devices in the corresponding nodes of the powerdistribution network. In this paper

a method of harnessing complex power storage devices

including batteries and super capacitors to deal with various power quality problems caused by high power density distributed photovoltaic access to distribution network is proposed. Firstly

such multi-object power quality control index constraints as node voltage deviation and the total current harmonic distortion rate are described. Secondly

an optimization model of energy storage locating and sizing of power distribution network with high power density distributed PV combined with the optimization model is established. It is solved by the improved multi-objective particle swarm optimization algorithm. Finally

the IEEE-33 nodes power distribution system is taken as an example to verify the simulation results

which shows that the proposed method has a good effect in power quality management of distribution network with access of high power density distributed photovoltaic system.