摘要
基于加权最小二乘法和不确定度分析原理,根据锅炉热效率不确定度的分析结果确定权重,给出了加权最小二乘锅炉热效率分析计算模型。以某电厂200 MW机组为例的计算结果表明,测量结果的扩展不确定度接近时,可以采用算术平均法计算锅炉热效率;测量结果的扩展不确定度相差较大时,则采用加权最小二乘估计模型计算锅炉热效率更加准确。
Based on the weighted least square principle and the uncertainty analysis principle,the weight has been determined from results of uncertainty analysis for thermal efficiency of the boiler,the model for analysing and calculating thermal efficiency of boiler based on the weighted least square being given.Taking 220 MW unit in one power plant as example,the results of calculation show that the thermal efficiency of boiler can be calculated by using arithematic averiging method in case the extended uncertainties are close to each other,and the thermal efficiency of boiler can be more accurately estimated in event the deviation among extended uncertainties being large.
出处
《热力发电》
CAS
北大核心
2011年第4期45-47,共3页
Thermal Power Generation
