As a clean and efficient power generation technology

solar thermal complementary combined cycle power generation(ISCC) system is concerned widely. By taking the ISCC system containing three-pressure reheat combined cycle and trough solar field as the research object

and based on the conventional trough ISCC system(using solar energy to replace the high pressure evaporator(system 1))

two new trough ISCC system are presented

namely using solar heat collection field to replace the high and medium pressure evaporators simultaneously(system 2)

and using solar heat collection field to replace the high

immediate and low pressure evaporators simultaneously(system 3). Moreover

the dynamic performances of the above three ISCC systems are analyzed under the operation condition of typical day. The results show that

with proper operation strategy presented above

the three systems can not only realize safe and stable operation

but also reduce the impact of solar energy varies on the ISCC system output power. Under the operation condition of typical day

the second type of ISCC system(system 2) has better thermal performance.