Liqiang Duan: Doctor of Engineering; Professor of the School of Energy, Power and Mechanical Engineering, North China Electric Power University; Doctoral supervisor. Work experience: from April 1999 to September 1999, Engineer, China Academy of Atomic Energy Sciences; from November 2003 to December 2005, Lecturer, School of Energy, Power and Mechanical Engineering, North China Electric Power University; from January 2006 to present, Professor, School of Energy, Power and Mechanical Engineering, North China Electric Power University; from March 2008 to July 2009, visiting scholar of MIT Energy Initiative. Mainly engaged in the research of advanced energy system integration and optimization, including: (1) Integrated optimization of high parameter thermal power generation systems and clean coal power generation systems (such as integrated gasification combined cycle system); (2) Research on distributed energy supply systems; (3) Research on multi-energy complementary power systems (including solar–coal complementary, solar–gas complementary, multi-energy complementary distributed systems, etc.); (4) Research on low CO2 or near-zero CO2 emission power systems; (5) Research on optimization of fuel cell hybrid power systems.