燃机电厂9F型机组热电负荷优化分配研究

电厂热电负荷优化分配是指在全厂总调度负荷下,根据各机组的热力性能确定各机组应承担的热电负荷,使得全厂效益最大或能耗最小的一种最优化问题.不同于燃煤热电厂,燃机电厂9F型机组由于设计为燃气轮机加蒸汽轮机的组合方式运行,因此在联合循环热力性能模型建立上较为复杂.提出了将余热锅炉新蒸汽参数作为中间变量,建立了机组天然气燃料消耗与电负荷、热负荷之间的关系模型,确定了优化计算的目标函数和边界约束条件,并采用非线性规划方法求解.模拟与实际运行结果均表明,该优化分配方法能有效降低燃机电厂燃料消耗水平,可以为同类型燃机电厂热电负荷优化分配提供参考.

Research of combined heat and power load optimal distribution in gas turbine power plant

Combined heat and power load optimal distribution is a method that distributes the load to all units of the power plant in order to obtain the minimum fuel consumption ormaximum economic benefit. But thermal performance model of combined cycle is difficult to set up for the gas turbine power plant in which the gas turbine and steam turbine worktogether, which is different from the coal-fired power plant. In this paper, the relationship of natural gas consumption, heat and power load is established by setting the new steamparameters in waste-heat boiler as intermediate variables. The objective function and boundary conditions are also established. The results of optimal distribution show that thismethod can reduce the gas consumption. It provides a reference for optimization of heat and power load distribution in similar gas turbine power plant.