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联合循环机组中燃气轮机部件劣化对功率效率的敏感性分析

DOI: 10.13334/j.0258-8013.pcsee.2015.22.015, PP. 5803-5810

Keywords: 联合循环,燃气轮机,敏感性分析,部件劣化,节能诊断

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Abstract:

我国以市场换技术方式引进的F级燃气轮机,运行多年后其部件劣化不可避免。以机组现场运行数据为基础,应用回归分析法建立了燃气轮机的运行特性模型,并结合三压再热余热锅炉模型,研究了不同IGV开度下压气机劣化和透平劣化对联合循环机组功率、效率影响规律,以及对劣化所带来的影响提出了应对措施。以MPCP1-M701F联合循环机组为研究对象,分析表明:在相同IGV开度下,功率、效率的变化与部件劣化程度基本呈线性关系,透平劣化对功率、效率的影响大约是压气机的3倍;随着IGV开度的减小,功率对2种部件劣化的敏感性因子都呈下降趋势,效率对压气机劣化的敏感性因子呈上升趋势,但是对透平劣化的敏感性因子呈下降趋势。为弥补部件劣化带来的联合循环功率、效率下降,提出了调整IGV开度和改变透平排气温控线的方法来改善劣化工况,分析结果为挖掘机组的节能潜力提供参考。

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