In order to reduce the phenomenon of “wind and solar energy power abandonment” caused by the mismatch between the on-grid electricity generated by renewable energy power and coal-fired power unit

the coalfired power unit needs to achieve the deep peak shaving to provide the grid space for renewable energy power with the continuous increase of the installed capacity of renewable energy. At the same time

the coal-fired power unit provides the ability to further consume renewable energy power. The utilization of coupling reheated steam extraction with thermal energy storage and molten salt thermal energy storage heated by renewable energy power in deep peak shaving system of coal-fired power unit is proposed. The research on large-scale renewable energy power consumption by peak shaving system of coal-fired power unit integrated with thermal energy storage is discussed. Moreover

the comprehensive coal consumption for power generation and the CO_2 emission is analyzed. The results show that

the power output of the coal-fired unit decreases from 300.03 MW to 210.07 MW when the reheated steam extraction mass flowrate is 270.70 t/h

and the maximum power of renewable energy power consumption by thermal energy storage system is 187.26 MW. When the stored heat is released

the power output of coal-fired unit increases from 300.03 MW to 348.68 MW. When the renewable energy power consumption per unit time is 187.26 MWh

the comprehensive coal consumption for power generation is reduced by 8.49 g/k Wh and the CO2 emission is reduced by 28.23 t. This study provides a guiding idea for the absorption of high-proportion renewable energy power.