(1. College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China; 2. Electric Power Research Institute of State Grid Zhejiang Electric Power Corporation, Hangzhou 310014, China; 3. Longyuan Power Group Corporation Limited, Beijing 100034, China)

A novel energy management system of microgrid based on distributed control is presented, consisting of prediction layer, dispatch layer and control layer. By applying to photovoltaic-battery-hydro-diesel hybrid microgrid system, the concept of dispatch strategies is described in detail. Considering the specialty of photovoltaic and water resources, a proper schedule is given by dispatch layer based on bidding model. Then at the control layer, the components follow the dispatch schedule according to its own operation strategy.The power balance is guaranteed by reserve power allocation at the system level. A real photovoltaic-battery-hydro-diesel hybrid microgrid system is studied as an example.Simulation results demonstrate the performance of the proposed strategies on the dispatch of photovoltaic and water resources compared with practical operating data.