Research on Coordinated Control Strategy of Power Response Rate of Thermal Power Plant with High Temperature Molten Salt Heat Storage

Large-scale intermittent renewable energy grid-connected power generation requires thermal power units with sufficient flexibility to adjust resources, which can achieve deep peak regulation of 35% THA, and respond to load changes when intermittent renewable energy is connected to the grid in real time. In this paper, the flue gas heating molten salt is extracted directly from the process flow of the thermal power unit for heat storage, and the energy utilization efficiency is theoretically about three times that of the electric heat storage peak regulating system. The simulation results show that the coordinated control of flue gas-molten salt heat exchanger, molten salt-water/steam heat exchanger and boiler main control can reduce the depth peak regulation of thermal power units by 10%. The coordinated control method of thermal power unit of coupled molten salt heat storage system can effectively improve the response speed of AGC and primary frequency modulation of thermal power unit, and the output power response speed is increased by 39.12% after stabilization.