基于SPE的660 MW超临界汽轮机阀控方案数值模拟研究  

Study on numerical simulation for valve control scheme of 660 MW supercritical steam turbine based on SPE

作　　者：王文强 钱进[2,3] 覃海波 钟晶亮 龚德鸿 WANG Wenqiang;QIAN Jin;QIN Haibo;ZHONG Jingliang;GONG Dehong(Electric Power Research Institute of Guizhou Power Grid Co. , Ltd. , Guiyang 550025 Guizhou, China;College of Electrical Engineering of Guizhou University, Guiyang 550025 Guizhou, China;College of Power Engineering of Chongqing University,Chongqing 400044 ,China)

机构地区：[1]贵州电网有限责任公司电力科学院研究院,贵州贵阳550001 [2]贵州大学电气工程学院,贵州贵阳220025 [3]重庆大学动力工程学院,重庆400044

出　　处：《电力大数据》2018年第3期33-38,共6页Power Systems and Big Data

基　　金：中国南方电网有限责任公司科技项目(GZ2015-2-0047)

摘　　要：超临界汽轮机更为突出的固体颗粒侵蚀问题,已成为限制其运行灵活性的障碍。在汽轮发电机组深度调峰和频繁调峰运行模式下,优化阀控方案是减少固体颗粒侵蚀对汽轮机的危害的有效途径。论文以某660 MW超临界汽轮机为研究对象,建立调节级固体颗粒侵蚀模型,对机组在滑压运行和定压运行两种方式下、对应不同工况下,固体颗粒对汽轮机调节级动叶的侵蚀情况进行了数值模拟。通过数值模拟,确定了该型超临界汽轮机调节级固体颗粒侵蚀的主要发生部位,得到了机组分别在定压和滑压运行时,调节级固体颗粒侵蚀密度随负荷变化的规律。通过对模拟结果的分析,提出了降低调节级动叶固体颗粒侵蚀的阀控方案。The more serious solid particle erosion （SPE） of the super-critical pressure steam turbine has become a main obstacle to limit its operational flexibility. As the mode of the turbine peak-load-dispatch operating deeply and frequently, the optimized valve control scheme is a valid way to reduce the harm of solid particle erosion for turbine. This paper is taking a 660 MW super-critical steam turbine as the research object, aiming to get the SPE model to the blades of the turbine ＇ s governing stage, as its load varying respectively corresponded to sliding pressure and constant pressure running modes, the solid particle erosion condition of steam turbine governing stage move leaves are simulated. Through numerical simulation, the main location of the solid particle erosion of the governing stage is determined in the super-critical steam turbine, and the law of the change of the solid particle erosion density of the governing stage with load is obtained when the unit is running at constant pressure and sliding pressure respectively. Based on the analysis of the simulation results, a series of valve control scheme to reduce the SPE of governing stage of the turbine are presented.

关 键 词：超临界汽轮机 调节级 固体颗粒侵蚀 数值模拟 阀控方案 

分 类 号：TK26[动力工程及工程热物理—动力机械及工程]