阀门流量控制建模在汽轮机高中压转子低频振动处理中的应用
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摘要
高中压转子低频振动故障严重影响汽轮机组安全稳定运行,针对因阀门控制函数对阀门流量特性描述不准确导致的高中压转子低频振动故障,通过汽轮机阀门流量控制建模,建立汽轮机总阀位指令——阀门开度——蒸汽流量关系模型,准确描述进入汽轮机的蒸汽量、阀门升程等各主要参数的关系;通过修改机组阀门开启顺序、阀门流量特性优化、重叠度优化等手段,解决因阀门控制函数对阀门流量特性描述不准确导致的高中压转子低频振动故障。实践应用证明,该方法具有一定实际意义。
Low-frequency vibration fault of high and medium pressure rotors seriously affects the safe and stable operation of steam turbines. Aiming at the low-frequency vibration fault of high and medium pressure rotors caused by the flow characteristics of valves, this paper establishes the relationship model of steam turbine main valve position instruction-valve opening-steam flow through the flow control model of steam turbines, and accurately describes the main parameters such as steam flow into steam turbines, valve lift and so on. Relationship. By modifying the valve opening sequence, valve flow characteristics optimization, overlap degree optimization and other means, the low frequency vibration fault of high and medium pressure rotor caused by valve flow characteristics is solved. Practical application proves that this method has certain practical significance.
Low-frequency vibration fault of high and medium pressure rotors seriously affects the safe and stable operation of steam turbines. Aiming at the low-frequency vibration fault of high and medium pressure rotors caused by the flow characteristics of valves, this paper establishes the relationship model of steam turbine main valve position instruction-valve opening-steam flow through the flow control model of steam turbines, and accurately describes the main parameters such as steam flow into steam turbines, valve lift and so on. Relationship. By modifying the valve opening sequence, valve flow characteristics optimization, overlap degree optimization and other means, the low frequency vibration fault of high and medium pressure rotor caused by valve flow characteristics is solved. Practical application proves that this method has certain practical significance.
引文
[1]李劲柏,刘复平.汽轮机阀门流量特性函数优化和对机组安全性经济性的影响[J].中国电力,2008.41(12):50-53.
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[7]徐誉玮,雷增强,彭佩.汽轮机数字电液控制阀门流量特性试验及优化[J].广州电力,2013,28(3):12-16.
[8]唐培全,李慎斌,林兆乐.DEH阀门流量特性试验[J].山东电力高等专科学校学报, 2004.04(1):168-171.
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[11]施维新,石静波.汽轮发电机组振动及事故[M].北京:中国电力出版社,2017.
[12]杨建刚.旋转机械振动分析与工程应用[M].北京:中国电力出版社,2007.
[13]寇胜利.汽轮发电机组的振动及现场平衡[M].北京:中国电力出版社,2007.
[14]陆颂元,吴峥峰.汽轮发电机组振动故障诊断及案例[M].中国电力出版社,2016.
[15]陆颂元.汽轮发电机组振动[M].北京:中国电力出版社,2000.
[16]王延博.汽轮发电机组转子及结构振动[M].北京:中国电力出版社,2016.
[2]陆颂元,吴峥峰.汽轮发电机组振动故障诊断及案例[M].北京:中国电力出版社,2016.
[3]刘明华,孙小强,柳磊,等.汽轮发电机组轴承低频振动故障分析[J].宁夏电力,2016(4):60-63.
[4]杨富,温志强.汽轮机DEH阀门管理控制分析[J].华北电力技术,2006,24(1):46-48.
[5]尚星宇,何永君,王瑞,等.基于数据拟合的汽轮机调节阀流量特性优化[J].热力发电,2017,46(3):121-125.
[6]鲁叶茂,曹涛.汽轮机阀门最佳重叠度的确定方法[J].发电设备,2005(5):378-379.
[7]徐誉玮,雷增强,彭佩.汽轮机数字电液控制阀门流量特性试验及优化[J].广州电力,2013,28(3):12-16.
[8]唐培全,李慎斌,林兆乐.DEH阀门流量特性试验[J].山东电力高等专科学校学报, 2004.04(1):168-171.
[9]孙建平,苑一方.复杂过程的多模型建模方法研究[J].仪器仪表学报,2011,32(1):132-137.
[10]李维特,黄保海.汽轮机变工况热力计算[M].北京:中国电力出版社,2001.
[11]施维新,石静波.汽轮发电机组振动及事故[M].北京:中国电力出版社,2017.
[12]杨建刚.旋转机械振动分析与工程应用[M].北京:中国电力出版社,2007.
[13]寇胜利.汽轮发电机组的振动及现场平衡[M].北京:中国电力出版社,2007.
[14]陆颂元,吴峥峰.汽轮发电机组振动故障诊断及案例[M].中国电力出版社,2016.
[15]陆颂元.汽轮发电机组振动[M].北京:中国电力出版社,2000.
[16]王延博.汽轮发电机组转子及结构振动[M].北京:中国电力出版社,2016.