Abstract: For the problem of uneven power output and unbalanced state of charge（SOC）of energy storage

units caused by large-scale integration of distributed generation systems（DGS），such as photovoltaic and wind

turbine，into the grid，an improved consistency algorithm based on gradient compensation was proposed based on a multi-agent system. The DGS，decommissioned power battery energy storage system（DPBESS）and the grid were jointly formed into a multi-agent microgrid system. The SOC equalization control method was designed based on the improved consistency algorithm，which speed up the SOC equalization of the energy storage system without

central controller and ensured the balance of energy supply and demand in the microgrid. The effectiveness of the

proposed control method was verified by simulation.

      Key words: multi-agent system；state of charge（SOC）equalization control；microgrid；energy supply and

demand balance；improved consistency algorithm