In recent years

the solar power generation shows great potential for development due to its such advantages as clean and environmental protection. However

the output power of the photovoltaic generation is very unstable due to the influence of factors such as natural environment etc

which affect greatly stability and reliability of the power network. Therefore

a kind of stabilization strategy of photovoltaic power fluctuation based on SOC consistency of multi-battery packs is proposed in this paper. By adjusting the output power of the energy storage system

the fluctuation component of the photovoltaic output power which exceeding the short-term fluctuation rate is compensated. During the compensation period

the minimum difference of state of charge（SOC）of each energy storage battery is taken as the optimization target and the charge and discharge status switching and power distribution of battery pack is as optimization variables.Under the premise of not weakening the compensation effect

the SOC difference of each battery pack is gradually reduced and the frequent switching of charge and discharge status of the battery pack is improved.Finally

the stabilization strategy simulation platform is set up by the use of Matlab software so to perform the experiment. The result shows that the strategy proposed in this paper can be able to achieve desired goals.