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中文摘要：
电站锅炉风量测量装置准确度差、标定复杂。提出一种锅炉总风量软测量方法，通过分析煤燃烧产生热量与消耗空气量之间的关系，推导出利用热量一氧量计算风量的基本公式。从理论上可以消除未完全燃烧损失影响，因此热量计算过程相对简单。进一步经过煤质和空气湿度修正后，可以采用干烟气氧量或湿烟气氧量计算风量并具有更高的准确度。最后引入给煤量信号进行动态补偿，可保证软测量风量的动态响应速度同实际风量相一致。在-600Mw机组上，通过实验对比不同负荷工况下软测量风量与实际测量风量，结果表明软测量准确度好、动态响应速度快、受煤质变化影响小，能够满足现场需要。
英文摘要：
Since measurement facility for air volume of utility boiler has poor accuracy and is complicated to standardize, a soft-sensor method for total air volume in boiler was presented. By analyzing the relation between coal combustion heat and consumed air, the basic formula for air volume based on heat-oxygen content was constructed, which can eliminate the influence of unburned carbon theoretically, so the heat calculation process was relatively simple. After amending the coal quality and air humidity, by using the dry or wet flue gas oxygen content, the air volume with better accuracy was obtained. After the dynamic compensation of fuel flow, the consistency of dynamic response time between soft-sensor signal and practical signal was ensured. By the experiment in a 600 MW unit, the comparison between soft-sensor signal and practical signal of total air volume under different operation conditions was made. The experiment results show that the soft-sensor signal has the merits of better accuracy and quick dynamic response, and it is insensitive to the changes of coal quality, which can meet the local requirements in the thermal power plant.
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