1. Department of Power Engineering
2. School of Energy
3. Power and Mechanical Engineering
4. North China Electric Power University
5. Baoding 071003
6. Institute of Clusters and Low Dimensional Nanomaterials
7. School of Mathematics and Physics
8. Beijing
9. People's Republic of China
10. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources
11. Beijing 102206
12. China
13. Beijing Key Laboratory of Energy Safety and Clean Utilization