Coal mill intelligent control method and device suitable for deep peak regulation of power station

The invention relates to the technical field of power station peak regulation, in particular to a coal mill intelligent control method and device suitable for deep peak regulation of a power station. According to the scheme, the influence of operation of coal mills of all layers of coal pulverizing systems under different dispatching instructions on heat balance of a boiler furnace is analyzed, and an optimal coal seam mill group operation mode is obtained through intelligent analysis and calculation, so that the overall safety of a coal-fired power generation unit boiler is improved to the maximum extent; and on the other hand, in combination with the boiler combustion system model of the coal-fired power generation unit, the final target of improving the economical efficiency of the unit in the deep peak regulation mode is achieved by optimizing the start-stop time nodes of the operation modes of all the mill units. Namely, in combination with boundary conditions such as a dispatching instruction of the coa