For enhancing the utilization of energy storage system and improving the power quality of micro grid and power grid in parallel operation condition

in this paer

a kind of comprehensive compensation strategy on power quality of microgrid on the basis of multi-function energy storage converter（power coversion system

PCS）is proposed. On the premise of not changing status of energy storage converter

the harmonic current

reactive power and imbalance current are compensated selectively by the use of spare capacity of PCS with combination of generation principle of compensation current and by the use of spare capacity of PCS

so to achieve the output current control of the grid connected current compensation component under the interference of distortion voltage. Finally

the microgrid system containing energy storage device is set up and related experiments on the proposed control strategy is performed. It is shown by the result that it has better power quality control capability.