孙景阳1，胡英华2，胡勇1，胡玉平1*
1.山东大学 能源与动力工程学院，山东济南250061；
2.山推工程机械股份有限公司，山东济宁272073
摘要：为了实现分布式能源系统的合理选型匹配，对不同负荷下燃气发电机组的发电效率和热电比曲线进行拟合，以某小区冷热电负荷及电价为计算条件，年总成本费用为目标函数，设置计算对照组，研究燃气内燃机变工况特性对分布式能源系统寻优选型的影响。结果表明：燃气发电机组变工况的热电比和发电效率对系统选型和年总成本影响显著，与采取额定参数作为计算输入条件相比，本文的计算模型和备选设备条件下，变热电比可以使年总成本减少4.02%，年可节约标准煤1 161.31 t；变发电效率可以使年总成本减少6.17%，年节约标准煤2 865.91 t；二者可以使年总成本减少5.62%，年节约标准煤2 671.17 t。
关键词：燃气发电机组；变工况特性；发电效率；热电比；分布式能源
Abstract:In order to realize the reasonable selection and matching of distributed energy system, the generation efficiency and thermal power ratio curves of gas turbine generator set under different loads are fitted. Taking the cooling,heating and power load and electricity price of a residential area as the calculation conditions,and the annual total cost as the objective function,the calculation control grop is set,the influence of offdesign performance of gas engine on the optimal selection of distributed energy system is studied.The calculation results show that considering the heattoelectric ratio and power generation efficiency of gas turbine generator sets have a significant impact on system selection and total annual cost. Under the conditions of this calculation model and alternative equipment, compared to using rated parameters as the calculation input conditions, the variable heattoelectric ratio can reduce the total annual cost by 4.02%, save 1 161.31 tons of standard coal. The variable power generation efficiency can reduce the total annual cost by 6.17% and save 2 865.91 tons of standard coal. Taking the two together can reduce the total annual cost by 5.62%, and save 2 671.17 tons of standard coal.
Keywords:gas turbine generator set; offdesign performance; power generation efficiency; heattoelectric ratio; distributed energy
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