Coal-fired power plant blending combustion method and system

The invention relates to the technical field of coal-fired power plants, and discloses a coal-fired power plant blending combustion method and system.The current actual calorific value a of a coal-fired power plant is obtained, when the actual calorific value a is smaller than a target calorific value A, the calorific value difference value A-a between the actual calorific value a and the target calorific value A is calculated, and the number P of coal feeders of a coal bunker is obtained; adjusting the number P of the coal feeders according to the calorific value difference value A-a, determining the adjusted number of the coal feeders, collecting coal type data of corresponding coal types of the coal bunker, setting the coal type supply quantity of the corresponding coal types of the coal bunker according to the coal type data and the adjusted number of the coal feeders, and performing fire coal blending on the coal-fired power plant based on the coal type supply quantity of the corresponding coal types of