Automatic coal blending combustion control method for coal-fired power generation unit

The invention discloses an automatic coal blending combustion control method for a coal-fired generation unit. The automatic coal blending combustion control method for the coal-fired generation unit is characterized by comprising the following steps of: S1, building a coal blending combustion model; S2, setting coal blending combustion requirements; S3, optimally calculating the coal mixing proportion; and S4, automatically controlling coal blending combustion. According to the automatic coal blending combustion control method for the coal-fired generation unit, by taking a safety boundary and an environmental protection boundary of boiler combustion as constraint conditions, a blending proportion of blended coal in a boiler is optimized and calculated according to an actual load of the unit, a boiler combustion working condition and a coal storage condition of a coal yard; coal feeders is automatically adjusted to control a coal type proportion according to optimal natural coal consumption and desulfurizati