基于能量价值理论的电站循泵优化及系统开发  

Optimization and system development of circulating water pump in thermal power plant based on theory of energy value

作　　者：张蕾[1] 魏龙[1] 冯飞[1,2] 涂中强[1] 徐治皋[2] 

机构地区：[1]南京化工职业技术学院机械技术系,江苏南京210048 [2]东南大学能源与环境学院,江苏南京210096

出　　处：《排灌机械工程学报》2011年第2期144-148,共5页Journal of Drainage and Irrigation Machinery Engineering

基　　金：江苏省'六大人才高峰'资助项目(09-D-018)

摘　　要：节能降耗与追求利润是市场经济条件下电力生产的主题.以工程热力学和能量价值理论为基础,利用汽轮机背压修正曲线、循环水泵和凝汽器的特性公式,并充分考虑煤、电能量价值的市场差异,分别建立了基于供电煤耗的循环水系统能耗优化模型,以及基于能量价值理论的循环水系统经济优化模型的目标函数.开发了基于PI实时数据库和.NET平台的火力发电厂循环水优化系统,以一定周期从PI数据库中实时读取电厂最新工况信息,进行数据预处理和稳态判别,利用遗传算法计算生成循环水泵的最优在线运行方式,求出该运行方式下的优化收益,给出了操作建议.该系统已在某电厂6台机组上实现了循环水泵的在线优化调度.实际运行表明:在某工况下,该电厂1#、2#机组通过减开一台循环水泵,节约厂用电量975.46 kW,增加收益171.18元/h,减轻了运行人员操作的盲目性,改善了循环水泵粗调或不调的现状.该系统界面友好,操作性强,易于移植和推广.Energy efficiency and fuel economy are the key subjects in the profit driven electricity generation market.The objective functions of an energy consumption optimization model and an economic optimization model have been established based on engineering thermodynamics and energy value theory.These models took account of the market value difference between coal and electricity.The circulating pump optimal operation online scheduling was derived by calculating steam turbine back pressure correction curve and the pump and condenser features.A thermal power plant optimized circulating water system was developed with PI real-time database in.NET platform.Data were read from PI database periodically for pre-processing and steady-state discrimination to determine the most effective pumping by using Genetic Algorithm.The optimal gains can be found and operational recommendations can be given from the system.The system has been applied on six units in a power plant.In a certain condition,it can save power of 975.46 kW and increase revenue of 171.18 RMB/h through stopping a circulating pump of unit 1# and 2#.The system significantly reduces the risks introduced by human operators and inefficient pump adjustment.Its user-friendly interface makes the system easy to use and promote.

关 键 词：循环水系统 PI实时数据库 .NET平台 能量价值理论 遗传算法 循环水泵优化调度 

分 类 号：S277.9[农业科学—农业水土工程] TK267[农业科学—农业工程]