1. National Engineering Laboratory for Biomass Power Generation Equipment, School of New Energy, North China Electric Power University, Beijing 102206, China
2. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China
3. School of Energy, Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China
4. National Energy Biological Power Generation Group Corporation LTD, Beijing 100052, China