Solar power plants can be complementary to other new energy power generation stations

and can also undertake the task of peak modulation and frequency modulation of power grid

which have attracted more and more attentions. In this paper

the dynamic simulation model of thermal storage system and power generation system is built and verified by Apros software. The coordinated control system of solar power plant considering the influence of heat storage is designed

and the maximum variable load rate of the solar power plant in different load intervals is studied. The results show that the proposed coordinated control strategy has a good control effect.Compared with the control without heat storage control

the deviation of main steam pressure with heat storage control reduces from 0.17 MPa to 0.07 MPa. Under the set limit conditions

the maximum load rise rate of 100%THA～75%THA load interval is 11.57%/min

and the maximum load reduction rate is 8.94%/min. The results can provide reference for peak shaving and frequency modulation operation of photothermal power plants.