供工业蒸汽热电联产机组滑参数运行的灵活性与经济性分析  

Flexibility and Economic Analysis of Parameter Sliding Operation for a Combined Heat and Power Unit Supplying Industrial Steam

作　　者：熊涌盛 刘明[1] 严俊杰[1] XIONG Yongsheng;LIU Ming;YAN Junjie(State Key Laboratory of Multiphase Flow in Power Engineering,Xi’an 701149,China)

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,西安710049

出　　处：《工程热物理学报》2024年第11期3262-3268,共7页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.52276016)。

摘　　要：通过供工业蒸汽实现热电联产,是提升燃煤发电机组能量利用效率和经济性的有效手段。然而,当热电联产机组低负荷运行时,进入工业蒸汽管道的抽汽温度过高会限制机组的运行灵活性。为解决这一难题,本文提出了降低再热蒸汽温度的滑参数运行模式,建立了系统变工况性能分析模型,并以330 MW热电联产机组为例分析了灵活性与能耗特性。研究结果表明,再热蒸汽滑参数运行可增加机组最大调峰容量约14%,且再热蒸汽温度降低到一定程度后可降低机组发电煤耗率,典型供暖工况下,滑参数运行机组年运行收益达78.84万元。Supplying industrial steam can achieve combined heat and power generation,and it is an effective way to enhance the energy efficiency and economic performances of coal-fired power generation units.However,the high extraction temperature entering the industrial steam pipeline limits the operational flexibility,when the combined heat and power unit operates under low power load condition.To address this issue,a parameter sliding operation strategy by reducing the reheat steam temperature was proposed in this study.Then,the system performance analysis model under variable operating conditions was developed,and the flexibility and energy consumption characteristics of the system were analyzed with a 330 MW combined heat and power unit as the reference case.The results show that the maximum peak shaving capacity of the unit increases by about 14%with the operation mode of reheat steam temperature sliding,and the coal consumption rate of the unit can be reduced after the temperature of the reheated steam is reduced to a certain extent.Under typical heating conditions,the annual operating income of the operation mode of reheat steam temperature sliding is about 788400 CNY.

关 键 词：热电联产 双抽机组 抽汽超温 经济性分析 

分 类 号：TM612[电气工程—电力系统及自动化]