联合循环机组维护成本建模及求解

Maintenance Cost Optimization for Combined Cycle Gas Turbines

为更加准确合理计算联合循环机组发电成本,在传统联合循环机组组合模型基础上,引入联合循环机组维护成本模型,该模型的难点是启机维护成本和运行维护成本在同一计算周期内的互斥关系。针对这一难点,首先将启机维护成本叠加到模式转移成本中考虑,然后通过分析联合循环机组中燃气轮机在计算周期内是否有启机,确定目标发电成本是否考虑运行维护成本,同时使用线性化技巧等价变换非线性表达为线性表达,建立MIP模型。利用系统实际运行数据对文中模型进行测试,测试表明该模型有效解决联合循环机组维护成本问题,优化结果合理。

In order to accurately calculate the generating cost of the combined cycle gas turbine (CCGT),this paper introduces the maintenance cost model of CCGT based on the traditional model. The difficulty of this model is that the start-up and operation maintenance cost does not coexist in the same calculation period. For this purpose,first we can computer the start-up maintenance cost by superposing it to the mode transition cost,and then by analyzing whether the gas turbine of CCGT starts up in the calculation period we can determine whether to add operation maintenance cost to the target cost. Meanwhile,we can transfer the non-linear expression to the linear expression by linearization techniques and establish the mixed integer linear program. This paper uses the actual data of Macao for testing. The testing shows that the model can effec-tively solve the maintenance cost of CCGT with more reasonable results.