中文摘要：

能量平衡法供热机组建模可根据采暖抽汽流量和工业抽汽流量信息实时计算出发电功率最大与最小值，为调度运行部门提供热电联产机组的功率输出范围等有效信息。然而能量平衡法在建模过程中没有考虑蒸汽存汽轮机流动过程中所产生的汽门泄漏等杂散损耗，因此在实际工程应用中产生一定的误差。根据不同采暖抽汽流量及工业抽汽流量下发电机实测功率曲线与能量平衡法理论计算功率曲线相关性较强的现象，在建立能量平衡法修正模型时，采用了与理论模型结构相同的线性组合表达式，并重新辨识模型参数。经过修正后的能量平衡法模型计及了热电联产机组杂散损耗．可以更为准确地描述热电联产机组抽汽流量与输出功率间映射关系。通过在供热机组现场试验，验证了该方法的准确性、合理性和实用性。

英文摘要：

The heating unit modeling using energy balance makes it possible to calculate real time maximum and minimum power outputs according to the information of residential and industrial heat supplies, which will provide valid information such as the power output range of cogeneration units for system dispatcher. However, the heat losses such as steam leakage of valves caused by steam turbine internal flow is not taken into account in the modeling with theoretical energy balance methodology, which incurs significant errors in practical operation of heating generators. Based on the facts that high correlation exists between the actual power curve and the theoretical curve under different heat supplies, the linear combinatory expressions identical to theoretical model structure is added to the rectified model. Meanwhile all parameters are re-identified by utilizing the least squares methodology. After correction, the heat losses are fully considered in the rectified energy balance model, which can reflect the relationship between power output and heat supply of heating units more precisely. The accuracy, reasonableness and feasibility of the rectified model are verified through field tests.