In the context of intelligent power generation,it is necessary to explore in-depth methods for analyzing and utilizing the operational data of coal-fired power generation units. The economic performance of unit operation is usually characterized by the coal consumption of power generation (power supply),which is essentially the ratio of fuel consumption to power generation. This article proposes to usethe ratio of electricity to coal-the ratio of power generation to fuel to calculate the operating economy of a coal -fired boiler,forminga main conceptual system where the air coal ratio,water coal ratio,and electricity coal ratio are all measured based on unit fuel quantity.Contrary to the lower coal consumption and better economy,the higher the ratio of electricity to coal and the better the economy,indicatingthat the effective output generated by unit fuel consumption is the highest. Based on the actual operating data of a 600 MW coal-fired generating unit with a down-fired boiler,the electricity coal ratio,air coal ratio,and water coal ratio were calculated,and the air coal ratio andwater coal ratio were used to predict (fit) the changes in the electricity coal ratio through a quadratic function,with good prediction results.The variation law of the quadratic function and the range of values for the current air coal ratio and water coal ratio of the unit can providequantitative basis for optimizing and adjusting the air coal ratio and water coal ratio of the unit operation. The experimental results of theonline monitoring of three-dimensional combustion in the furnace and the closed-loop optimization control system of the boiler indicatethat the improvement direction of the air coal ratio and water coal ratio obtained from the prediction model based on this method is consistent with the changes in the actual parameters of the optimized operation. The increase in the electricity coal ratio of the unit before and after the experiment reached 2.42%,achieving practical results in improving the economic efficiency of the unit operation,and proving thepracticality of the analysis method in this paper.

高飞(1983—),男,河北保定人,高级工程师。E-mail:snipervip@126.com

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GAO Fei,ZHANG Qiang,ZHEN Zhiguang,et al.Predicting theelectricity coal ratio using the wind coal ratio and water coalratio and its application in coal-fired generating unit operation optimization[ J].Clean Coal Technology,2024,30(9):123-130.