张振宇,戚梦瑶
ZHANG Zhenyu,QI Mengyao

• 1:国家电投河南电力有限公司平顶山发电分公司
• 2:中国平煤神马能源化工集团有限责任公司铁路运输处

摘要(Abstract)：

某发电厂2台600 MW机组超临界凝汽式汽轮机启动及运行中低压缸胀差时而偏高,甚至超过汽轮机厂家规定的安全运行值,对此,分析了汽轮机相关参数变化对低压缸胀差的影响,发现造成低压缸胀差偏大的主要原因是低压轴封供汽温度控制效果差。通过改造低压轴封供汽温度控制系统,有效降低了汽轮机低压缸胀差,提高了机组的安全性和经济性。
In a power plant, differential expansion of low pressure cylinder of two 600 MW supercritical condensing steam turbines during startup and operation was high and sometimes exceeded the safety value specified by the manufacturer. Therefore, the paper analyzes how the relevant parameter variation of the steam turbine influences differential expansion of low pressure cylinder. It is detected that the large differential expansion of low pressure cylinder results from poor temperature control of low pressure steam supply for shaft sealing, by transformation of which differential expansion of low pressure cylinder of steam turbine is greatly reduced, and safety and economy of the units are improved.

关键词(KeyWords)： 超临界汽轮机;低压缸;胀差;低压轴封温度
supercritical steam turbine;LP cylinder;differential expansion;LP shaft sealing temperature

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 张振宇,戚梦瑶
ZHANG Zhenyu,QI Mengyao

DOI: 10.19585/j.zjdl.2017.03.014

参考文献(References)：

• [1]罗晶.微油模式下机组冷态启动的低压缸差胀控制[J].浙江电力,2011(12):60-62.
• [2]黄树红.汽轮机原理[M].北京:中国电力出版社,2008.
• [3]朱北恒,孙长生,丁俊宏.2009年浙江火电机组热工保护系统可靠性改进[J].浙江电力,2010(8):53-56.
• [4]解祥奇.汽轮机启动过程中胀差的分析和控制[J].科技风,2011(11):40-41.
• [5]何洪流.汽轮发电机低压缸胀差大原因分析及处理[J].贵州电力技术,2015(7):17-19.
• [6]刘振杰,许晨,顾春术.600 MW机组胀差变化特性分析及控制[J].电力安全技术,2013(6):7-10.
• [7]周辉,丁亮.汽轮机胀差产生的原因分析与控制[J].应用能源技术,2011(7):4-6.
• [8]程昆明,张俊杰,黄冬梅.机组胀差大的原因分析及处理[J].华中电力,2003(6):68-70.