Wind power accommodation strategy and benefit analysis of combined heating of electric and coal boilers

Aiming at the large-scale wind-dissipating problems existing in the rapid development of wind power in the Three North region of China, the wind-reduction and dissipation strategy based on combined heat storage of electric heat storage boilers and coal-fired boilers was studied, and a comprehensive benefit analysis model was established. Based on the wind power output and load forecasting data of the power grid operation management department, this paper proposes a wind power calculation model for a certain period of time, and on this basis, studied the electricity-heat of heat storage and heat release by the electric heat storage boiler. An energy conversion model was established to establish an operational strategy for the replacement of coal-fired boilers for heating by abandoning wind power. According to the total heat required by the heating network and the operation strategy of the electric heat storage boiler, the optimal coal-saving operation mode of the coal-fired boiler was studied, and a coordinated operation control strategy for electricity and coal boilers for combined heating and wind rejection was further established. The conversion model between the electric power storage heat-dissipation boiler and the coal consumption of coal-fired boilers under the same heat is studied, and a comprehensive benefit analysis model for the combination of electricity and heat boilers was proposed. The simulation analysis conducted by the wind power heating project example showed that the proposed strategy of combined heating and disposing of wind power for coal and coal boilers can effectively improve the capacity of abandoning wind and dissipate energy, at the same time, it can significantly reduce coal consumption of coal-fired boilers and improve economic and environmental benefits. © 2019, Editorial Board of Acta Energiae Solaris Sinica. All right reserved.