Calculation method and device for carbon capture rate of low-carbon thermal power plant

The invention discloses a method and device for calculating the carbon capture rate of a low-carbon thermal power plant, and the method comprises the steps: obtaining the actual station service power consumption rate and first power generation efficiency of the low-carbon thermal power plant, and calculating the power supply efficiency of the low-carbon thermal power plant; wherein the first power generation efficiency is the power generation efficiency calculated by the low-carbon thermal power plant when a carbon capture system is not considered; according to the output power, the power supply efficiency and the cost influence coefficient of the low-carbon thermal power plant, the daily operation cost per kilowatt-hour of the low-carbon thermal power plant is calculated; wherein the cost influence coefficient is specifically the influence coefficient of the carbon capture system on the investment construction cost of the low-carbon thermal power plant; and according to a preset constraint condition and the