In the photovoltaic(PV)prosumer cluster composed by multi-entities

there is PV power sharing between prosumers. The sharing level is pretty low due to the distributed PV feed-in-tariff policy at present. To enhance the sharing level

a multi-buyer and multi-seller structure is built in PV prosumer cluster according to prosumers' load characteristics. PV prosumer cluster operator is the leader

and the internal price is settled to maximize the profit considering the utility of prosumers and the distributed PV feed-in-tariff policy in China. Prosumers act as follower and will maximize their utility by response to the internal price. The demand response(DR)model based on Stackelberg game is built according to the behavioral characteristics of operator and prosumers

and the equilibrium of this game is proved to be exist and unique. It can be demonstrated that operator's profit and prosumers' utility can be increased by internal price

which is settled by the operator

and the PV power sharing level is also enhanced in the PV prosumer cluster. The effectiveness of model is verified in the case study. This work is supported by National High Technology Research and Development Program of China(863 Program)(No. 2014AA052001).