Integrated solar combined cycle(ISCC)is the integration of solar energy and gas-steam combined cycle power generation.It is an effective way of solar thermal utilization.The integration scheme of Huaneng ISCC experiment platform at Hainan Nanshan is injecting the heat generated by Fresnel solar collector field to the low pressure segment of turbine for power generation.This paper presents an improved ISCC integration scheme

which is injecting the heat generated by solar collector field to the medium pressure segment of turbine and setting thermal storage system to ensure the stability of the collector field output.The results show that

the improved integration scheme can effectively enhance the solar energy output by 0.189 MW

the solar-electric conversion efficiency by 0.15%

and the equivalent natural gas savings by39.69m3/h.The system economy is dramatically improved.