Article(id=1236369222918525335, tenantId=1146029695717560320, journalId=1210938733613449225, issueId=1236369220812984708, articleNumber=null, orderNo=null, doi=10.19666/j.rlfd.202402027, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1709136000000, receivedDateStr=2024-02-29, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1772702993373, onlineDateStr=2026-03-05, pubDate=1732464000000, pubDateStr=2024-11-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1772702993373, onlineIssueDateStr=2026-03-05, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1772702993373, creator=13701087609, updateTime=1772702993373, updator=13701087609, issue=Issue{id=1236369220812984708, tenantId=1146029695717560320, journalId=1210938733613449225, year='2024', volume='53', issue='11', pageStart='1', pageEnd='168', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1772702992871, creator=13701087609, updateTime=1772703093306, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1236369642126627337, tenantId=1146029695717560320, journalId=1210938733613449225, issueId=1236369220812984708, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1236369642126627338, tenantId=1146029695717560320, journalId=1210938733613449225, issueId=1236369220812984708, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=38, endPage=46, ext={EN=ArticleExt(id=1236369223228903840, articleId=1236369222918525335, tenantId=1146029695717560320, journalId=1210938733613449225, language=EN, title=Comparative analysis of current standards for vibration evaluation and measuring points layout in hydropower units, columnId=1236369221647651205, journalTitle=Thermal Power Generation, columnName=Special topic on low-carbon transformation of power system, runingTitle=null, highlight=null, articleAbstract=

The requirements of over limit evaluation and measuring points layout of vibration/swing in hydropower units in industry standards and national standards are compared. The layout of vibration/swing measurement points on the project site is also described. It is found that the standards related to evaluation and the ones related to measuring points arrangement are inconsistent or unclear with the engineering site, such as vibration evaluation boundary conditions, evaluation criteria, evaluation working conditions and measuring points arrangement. Analysis shows that all the differences between the standards appear in vibration evaluation and measuring points arrangement for fixed parts, and the provisions on radial vibration (swing) of the unit shafting are relatively unified. Inconsistencies in all standards are not conducive to broad-spectrum application, and are prone to ambiguity and disagreement. The phenomenon that the evaluation standard is inconsistent with the measuring points standard, is not conducive to on-site comprehensive vibration evaluation of large or giant units. All the standard evaluation criteria lack the consideration of weight coefficient of amplitude exceeding the limit and cumulative duration, which is not conducive to the development of vibration fault and condition based maintenance, and data accumulation in the new role of hydropower units. The conclusion is expected to provide analytical help and reference for the practitioners of vibration standard compilation, installation and acceptance, operation management and scientific research and test of hydropower units.

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比对了行业标准和国家标准中关于水电机组振动/摆度的越限评价和测点布置要求,阐述了工程现场振动/摆度测点的布置等,发现评价标准、测点布置标准和工程现场之间出现了振动评价边界条件、评价准则、评价工况、测点布置等不一致或不明确的现象。分析发现:各标准间不统一之处均出现在固定部件的振动评价和测点布置,对机组轴系径向振动(摆度)的规定相对统一;各标准中的不一致现象,不利于标准广谱应用,且容易产生歧义和分歧;评价标准和测点标准不一致的现象,不利于大型或者巨型机组现场全面振动评价;所有标准中评价准则中缺少振幅越限幅度与累计时长权重系数考虑,不利于水电机组新型角色下振动故障及状态检修开展和数据积累。该结论可为水电机组振动标准编制、安装验收、运行管理和科研试验等从业人员提供帮助和参考。

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李明(1986),男,硕士,高级工程师,主要研究方向为水电机组运维检修及技术管理,
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李志华(1983),男,硕士,高级工程师,主要研究方向为水力发电机组监督、流场分析、故障诊断、调节控制系统性能测试等,

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Beijing: China Standards Press, 2018: 7., articleTitle=null, refAbstract=null), Reference(id=1236369236839420209, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222918525335, doi=null, pmid=null, pmcid=null, year=2016, volume=null, issue=null, pageStart=6, pageEnd=null, url=null, language=null, rfNumber=[26], rfOrder=50, authorNames=null, journalName=null, refType=null, unstructuredReference=水轮发电机组振动检测装置设置导则: DL/T 556—2016[S]. 北京: 中国电力出版社, 2016: 6., articleTitle=null, refAbstract=null), Reference(id=1236369236906529076, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222918525335, doi=null, pmid=null, pmcid=null, year=2016, volume=null, issue=null, pageStart=6, pageEnd=null, url=null, language=null, rfNumber=[26], rfOrder=51, authorNames=null, journalName=null, refType=null, unstructuredReference=Guide for vibration monitoring device configuration of hydraulic turbine generator units: DL/T 556—2016[S]. Beijing: China Electric Power Press, 2016: 6., articleTitle=null, refAbstract=null), Reference(id=1236369236990415161, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222918525335, doi=null, pmid=null, pmcid=null, year=2021, volume=null, issue=null, pageStart=10, pageEnd=null, url=null, language=null, rfNumber=[27], rfOrder=52, authorNames=null, journalName=null, refType=null, unstructuredReference=水电站基本术语: GB/T 40582—2021[S]. 北京: 中国标准出版社, 2021: 10., articleTitle=null, refAbstract=null), Reference(id=1236369237107855679, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222918525335, doi=null, pmid=null, pmcid=null, year=2021, volume=null, issue=null, pageStart=10, pageEnd=null, url=null, language=null, rfNumber=[27], rfOrder=53, authorNames=null, journalName=null, refType=null, unstructuredReference=Basic terminology of hydropower station GB/T 40582—2021[S]. 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Main categories of hydropower units

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名称类别容量/MW转速/(r·min–1)设备型号
发电机伞式700.0150.0SF700-40/12770
半伞125.087.5SF120-32/8360
悬式80.0428.6SF80-14/5100
水轮机轴流定桨12.5166.7ZDJP502-LH-333
轴流转桨140.0107.1ZZD827-LH-740
贯流定桨1.0500.0GDJ530-WZ-120
贯流转桨12.0115.4GZ995-WP-430
混流式700.0150.0HL153-LJ-660
水斗式
调节形式单调230.0100.0HLA1323-LJ-660
双调50.0107.1ZZ-HL-620
轴线布置横轴35.193.7GZ-WP-615
竖轴20.5333.3HLA153-LJ-180
单机容量P/MW1≤P
1 000
81.6600.0HL(C)-LJ-230
转轮直径D1/mm1 500≤D1≤12 000140.0107.1ZZD827-LH-740
定子直径R/mm3 000≤R≤20 000350.0125.0SF350-80/18900
机架直径R/mm3 000≤R≤22 000700.0150.0SF700-40/12770
), ArticleFig(id=1236369228639556411, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222918525335, language=CN, label=表1, caption=

主流水电机组类别

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名称类别容量/MW转速/(r·min–1)设备型号
发电机伞式700.0150.0SF700-40/12770
半伞125.087.5SF120-32/8360
悬式80.0428.6SF80-14/5100
水轮机轴流定桨12.5166.7ZDJP502-LH-333
轴流转桨140.0107.1ZZD827-LH-740
贯流定桨1.0500.0GDJ530-WZ-120
贯流转桨12.0115.4GZ995-WP-430
混流式700.0150.0HL153-LJ-660
水斗式
调节形式单调230.0100.0HLA1323-LJ-660
双调50.0107.1ZZ-HL-620
轴线布置横轴35.193.7GZ-WP-615
竖轴20.5333.3HLA153-LJ-180
单机容量P/MW1≤P
1 000
81.6600.0HL(C)-LJ-230
转轮直径D1/mm1 500≤D1≤12 000140.0107.1ZZD827-LH-740
定子直径R/mm3 000≤R≤20 000350.0125.0SF350-80/18900
机架直径R/mm3 000≤R≤22 000700.0150.0SF700-40/12770
), ArticleFig(id=1236369228740219715, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222918525335, language=EN, label=Tab.2, caption=

Standards for vibration evaluation and measuring points layout of hydropower units

, figureFileSmall=null, figureFileBig=null, tableContent=
标准号标准名称备注
DL/T 817立式水轮发电机检修技术规程发电机-评价
DL/T 827灯泡贯流式水轮发电机组启动试验规程机组-评价
NB/T 42052小水电机组启动试验规程机组-评价
NB/T 42127小水电机组验收检验导则机组-评价
DL/T 507水轮发电机组启动试验规程机组-评价
GB/T 15468水轮机基本技术条件水轮机-评价
GB/T 8564水轮发电机组安装技术规范机组-评价
GB/T 11348.5旋转机械转轴径向振动的测量和评定
第5部分:水力发电厂和泵站机组
机组-评价/测点布置
GB/T 21718小型水轮机基本技术条件水轮机-评价
GB/T 22581混流式水泵水轮机基本技术条件水轮机-评价
GB/T 32584水力发电厂和蓄能泵站机组机械振动的评定机组-评价
GB/T 7894水轮发电机基本技术条件发电机-评价
GB/T 28570水轮发电机组状态在线监测系统技术
导则
机组-测点布置
GB/T 17189水力机械(水轮机、蓄能泵和水泵
水轮机)振动和脉动现场测试规程
机组-测点布置
DL/T 556水轮发电机组振动检测装置设置导则机组-测点布置
), ArticleFig(id=1236369228836688713, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222918525335, language=CN, label=表2, caption=

涉及水电机组振动评价和测点布置的标准

, figureFileSmall=null, figureFileBig=null, tableContent=
标准号标准名称备注
DL/T 817立式水轮发电机检修技术规程发电机-评价
DL/T 827灯泡贯流式水轮发电机组启动试验规程机组-评价
NB/T 42052小水电机组启动试验规程机组-评价
NB/T 42127小水电机组验收检验导则机组-评价
DL/T 507水轮发电机组启动试验规程机组-评价
GB/T 15468水轮机基本技术条件水轮机-评价
GB/T 8564水轮发电机组安装技术规范机组-评价
GB/T 11348.5旋转机械转轴径向振动的测量和评定
第5部分:水力发电厂和泵站机组
机组-评价/测点布置
GB/T 21718小型水轮机基本技术条件水轮机-评价
GB/T 22581混流式水泵水轮机基本技术条件水轮机-评价
GB/T 32584水力发电厂和蓄能泵站机组机械振动的评定机组-评价
GB/T 7894水轮发电机基本技术条件发电机-评价
GB/T 28570水轮发电机组状态在线监测系统技术
导则
机组-测点布置
GB/T 17189水力机械(水轮机、蓄能泵和水泵
水轮机)振动和脉动现场测试规程
机组-测点布置
DL/T 556水轮发电机组振动检测装置设置导则机组-测点布置
), ArticleFig(id=1236369228966712152, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222918525335, language=EN, label=Tab.3, caption=

Statistics of standards application scopes

, figureFileSmall=null, figureFileBig=null, tableContent=
类型范围标准号
功率P/MW0.5≤P<15NB/T 42052、NB/T 42127、GB/T 21718
P≥1GB/T 11348.5、GB/T 32584
P≥5DL/T 827
P≥10GB/T 15468
P≥15DL/T 817、GB/T 8564
P≥25DL/T 507、GB/T 7894
直径D/mD≥2.5DL/T 827
D≤3.3NB/T 42052、NB/T 42127、GB/T 21718
D≥3.3或D≥1.0GB/T 15468、GB/T 8564
其他功率和直径未明确规定的GB/T 22581、GB/T 28570、GB/T 17189、DL/T 556
), ArticleFig(id=1236369229092541282, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222918525335, language=CN, label=表3, caption=

标准适用范围统计

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类型范围标准号
功率P/MW0.5≤P<15NB/T 42052、NB/T 42127、GB/T 21718
P≥1GB/T 11348.5、GB/T 32584
P≥5DL/T 827
P≥10GB/T 15468
P≥15DL/T 817、GB/T 8564
P≥25DL/T 507、GB/T 7894
直径D/mD≥2.5DL/T 827
D≤3.3NB/T 42052、NB/T 42127、GB/T 21718
D≥3.3或D≥1.0GB/T 15468、GB/T 8564
其他功率和直径未明确规定的GB/T 22581、GB/T 28570、GB/T 17189、DL/T 556
), ArticleFig(id=1236369229193204581, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222918525335, language=EN, label=Tab.4, caption=

Corresponding statistics of standards names and numbers for double-amplitude vibration evaluation

, figureFileSmall=null, figureFileBig=null, tableContent=
机组类型振动类型标准号
发电机立式机组带推力轴承支架的垂直振动GB/T 8564、DL/T 817、NB/T 42052、NB/T 42127、GB/T 32584、GB/T 7894
带导轴承支架的水平振动
定子铁芯部位机座水平振动
定子铁芯振动(100 Hz双振幅值)
水轮机立式机组顶盖水平振动GB/T 8564、NB/T 42052、GB/T 15468、GB/T 21718、GB/T 22581、GB/T 32584、GB/T 7894
顶盖垂直振动
水轮机+
发电机
卧式机组各部轴承垂直振动GB/T 8564、NB/T 42052、NB/T 42127、GB/T 15468、 GB/T 21718、GB/T 32584、GB/T 7894
各部轴承水平振动NB/T 42052、GB/T 15468、GB/T 32584
水轮机+发电机贯流式机组推力支架的径向振动GB/T 8564、DL/T827、NB/T 42052、GB/T 32584、GB/T 7894
各导轴承的径向振动
灯泡头的径向振动
), ArticleFig(id=1236369229314839409, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222918525335, language=CN, label=表4, caption=

双幅振动评价标准统计

, figureFileSmall=null, figureFileBig=null, tableContent=
机组类型振动类型标准号
发电机立式机组带推力轴承支架的垂直振动GB/T 8564、DL/T 817、NB/T 42052、NB/T 42127、GB/T 32584、GB/T 7894
带导轴承支架的水平振动
定子铁芯部位机座水平振动
定子铁芯振动(100 Hz双振幅值)
水轮机立式机组顶盖水平振动GB/T 8564、NB/T 42052、GB/T 15468、GB/T 21718、GB/T 22581、GB/T 32584、GB/T 7894
顶盖垂直振动
水轮机+
发电机
卧式机组各部轴承垂直振动GB/T 8564、NB/T 42052、NB/T 42127、GB/T 15468、 GB/T 21718、GB/T 32584、GB/T 7894
各部轴承水平振动NB/T 42052、GB/T 15468、GB/T 32584
水轮机+发电机贯流式机组推力支架的径向振动GB/T 8564、DL/T827、NB/T 42052、GB/T 32584、GB/T 7894
各导轴承的径向振动
灯泡头的径向振动
), ArticleFig(id=1236369229415502712, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222918525335, language=EN, label=Tab.5, caption=

Statistics of standards names and numbers for direct frequency and double-frequency double-amplitude vibration evaluation

, figureFileSmall=null, figureFileBig=null, tableContent=
机组类型振动类型标准号
发电机立式机组带推力轴承支架的垂直振动(通频值)DL/T
507
带导轴承支架的水平振动(转频值)
定子铁芯部位机座水平振动(转频值)
定子铁芯振动(100 Hz双副极频振动值)
水轮机立式机组顶盖水平振动(通频值)
顶盖垂直振动(通频值)
), ArticleFig(id=1236369229495194494, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222918525335, language=CN, label=表5, caption=

区分通频和倍频双振幅的评价标准统计

, figureFileSmall=null, figureFileBig=null, tableContent=
机组类型振动类型标准号
发电机立式机组带推力轴承支架的垂直振动(通频值)DL/T
507
带导轴承支架的水平振动(转频值)
定子铁芯部位机座水平振动(转频值)
定子铁芯振动(100 Hz双副极频振动值)
水轮机立式机组顶盖水平振动(通频值)
顶盖垂直振动(通频值)
), ArticleFig(id=1236369229591663493, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222918525335, language=EN, label=Tab.6, caption=

Statistics of standards names and numbers for vibration evaluation in motor driven and non driven ends

, figureFileSmall=null, figureFileBig=null, tableContent=
机组类型振动类型标准号
水轮发电机组立式旋转机械轴承或靠近轴承处转轴径向振动及相对振动GB/T 11348.5
卧式
贯流式
水轮发电机组摆度立式水导轴承GB/T 32584
卧式电机驱动端轴承
贯流式电机非驱动端轴承
水轮发电机组振动立式水导轴承GB/T 32584
卧式电机驱动端轴承
贯流式电机非驱动端轴承
), ArticleFig(id=1236369229671355276, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222918525335, language=CN, label=表6, caption=

区分电机驱动和非驱动端的评价标准统计

, figureFileSmall=null, figureFileBig=null, tableContent=
机组类型振动类型标准号
水轮发电机组立式旋转机械轴承或靠近轴承处转轴径向振动及相对振动GB/T 11348.5
卧式
贯流式
水轮发电机组摆度立式水导轴承GB/T 32584
卧式电机驱动端轴承
贯流式电机非驱动端轴承
水轮发电机组振动立式水导轴承GB/T 32584
卧式电机驱动端轴承
贯流式电机非驱动端轴承
), ArticleFig(id=1236369229759435667, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222918525335, language=EN, label=Tab.7, caption=

Descriptions of measuring points in “measuring points standard”

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机组类型测点类型标准号
水电机组立式混流或可逆混流机组上机架、下机架、顶盖水平振动测点GB/T 17189

GB/T 28570

DL/T 556
上机架、下机架、顶盖垂直振动测点
定子机座水平测点
定子机座垂直测点
立式轴流机组上机架、下机架、顶盖水平振动测点
上机架、下机架、顶盖垂直振动测点
定子机座水平测点
定子机座垂直测点
灯泡贯流式机组组合轴承、水导轴承径向水平和轴向水平
组合轴承、水导轴承径向垂直
灯泡头径向水平和垂直测点
转轮室径向水平和垂直测点
立式冲击式机组上机架、下机架水平振动测点
上机架、下机架垂直振动测点
水导轴承座水平振动测点
水导轴承座垂直振动测点
定子机座水平测点
定子机座垂直测点
), ArticleFig(id=1236369229868487581, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222918525335, language=CN, label=表7, caption=

测点标准对测点的描述

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机组类型测点类型标准号
水电机组立式混流或可逆混流机组上机架、下机架、顶盖水平振动测点GB/T 17189

GB/T 28570

DL/T 556
上机架、下机架、顶盖垂直振动测点
定子机座水平测点
定子机座垂直测点
立式轴流机组上机架、下机架、顶盖水平振动测点
上机架、下机架、顶盖垂直振动测点
定子机座水平测点
定子机座垂直测点
灯泡贯流式机组组合轴承、水导轴承径向水平和轴向水平
组合轴承、水导轴承径向垂直
灯泡头径向水平和垂直测点
转轮室径向水平和垂直测点
立式冲击式机组上机架、下机架水平振动测点
上机架、下机架垂直振动测点
水导轴承座水平振动测点
水导轴承座垂直振动测点
定子机座水平测点
定子机座垂直测点
), ArticleFig(id=1236369229948179363, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222918525335, language=EN, label=Tab.8, caption=

Comparison of measuring points positions between DL/T 556 and GB/T 28570

, figureFileSmall=null, figureFileBig=null, tableContent=
机组类型功率P/ MW振动类型
水电机组立式混流或可逆混流机组25<P≤100DL/T 556较GB/T 28570缺少定子
铁芯水平振动和定子铁芯垂直振动
灯泡贯流式机组P≤25DL/T 556较GB/T 28570增加定子
铁芯水平振动和定子铁芯垂直振动
立式冲击式DL/T 556较GB/T 28570增加定子
铁芯水平振动和定子铁芯垂直振动
卧式机组DL/T 556较GB/T 28570增加组合轴承、水导轴承径向水平和轴向水平,组合轴承、水导轴承径向垂直,定子铁芯水平、垂直振动
), ArticleFig(id=1236369230048842665, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222918525335, language=CN, label=表8, caption=

标准DL/T 556与GB/T 28570的测点位置比较

, figureFileSmall=null, figureFileBig=null, tableContent=
机组类型功率P/ MW振动类型
水电机组立式混流或可逆混流机组25<P≤100DL/T 556较GB/T 28570缺少定子
铁芯水平振动和定子铁芯垂直振动
灯泡贯流式机组P≤25DL/T 556较GB/T 28570增加定子
铁芯水平振动和定子铁芯垂直振动
立式冲击式DL/T 556较GB/T 28570增加定子
铁芯水平振动和定子铁芯垂直振动
卧式机组DL/T 556较GB/T 28570增加组合轴承、水导轴承径向水平和轴向水平,组合轴承、水导轴承径向垂直,定子铁芯水平、垂直振动
), ArticleFig(id=1236369230124340143, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222918525335, language=EN, label=Tab.9, caption=

Classification of spectrum vibration in “evaluation criteria”

, figureFileSmall=null, figureFileBig=null, tableContent=
序号内容标准号备注
1明确双振幅值但未明确频谱范围DL/T 817、NB/T 42052、NB/T 42127、GB/T 15468、GB/T 8564、GB/T 11348.5、GB/T 21718、GB/T 22581、GBT 7894双幅振动
2未明确双幅/频谱范围DL/T827
3明确通频/转频和双振幅值DL/T 507双振幅值+通频/转频
4明确通频/转频和双振幅值GB/T32584明确0.25~3.00倍转频范围
), ArticleFig(id=1236369230262752181, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222918525335, language=CN, label=表9, caption=

评价标准的频谱振动分类

, figureFileSmall=null, figureFileBig=null, tableContent=
序号内容标准号备注
1明确双振幅值但未明确频谱范围DL/T 817、NB/T 42052、NB/T 42127、GB/T 15468、GB/T 8564、GB/T 11348.5、GB/T 21718、GB/T 22581、GBT 7894双幅振动
2未明确双幅/频谱范围DL/T827
3明确通频/转频和双振幅值DL/T 507双振幅值+通频/转频
4明确通频/转频和双振幅值GB/T32584明确0.25~3.00倍转频范围
), ArticleFig(id=1236369230380192703, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222918525335, language=EN, label=Tab.10, caption=

Statistics of amplitude deviations of different spectrum types

, figureFileSmall=null, figureFileBig=null, tableContent=
机组工况测点名称转频双幅/μm通频双幅/μm极频双幅/μm
额定转速/(r·min–1)额定功率/%
12595铁芯水平16.044.91.7
铁芯水平26.541.42.5
150101定子机座水平40.4161.06.2
上机架垂直2.615.4
空载顶盖垂直振动8.045.0
), ArticleFig(id=1236369230472467397, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222918525335, language=CN, label=表10, caption=

不同频谱类型幅值偏差统计

, figureFileSmall=null, figureFileBig=null, tableContent=
机组工况测点名称转频双幅/μm通频双幅/μm极频双幅/μm
额定转速/(r·min–1)额定功率/%
12595铁芯水平16.044.91.7
铁芯水平26.541.42.5
150101定子机座水平40.4161.06.2
上机架垂直2.615.4
空载顶盖垂直振动8.045.0
), ArticleFig(id=1236369230564742091, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222918525335, language=EN, label=Tab.11, caption=

Statistics of swing limit values

, figureFileSmall=null, figureFileBig=null, tableContent=
序号限制名称标准号备注
1不超过轴瓦双边间隙0.70倍DL/T 827、DL/T 507、GB/T 32584、GB/T 15468、GB/T 8564越限超标
2不超过轴瓦双边间隙0.75倍DL/T 817、NB/T 42052、GB/T 22581、GB/T 7894越限超标
3未明确运行摆度限制NB/T 42127仅盘车摆度,未涉及稳定摆度
4明确摆度
限制值
GB/T 11348.5超标有缓冲区
), ArticleFig(id=1236369230669599698, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222918525335, language=CN, label=表11, caption=

评价标准的摆度限制值统计

, figureFileSmall=null, figureFileBig=null, tableContent=
序号限制名称标准号备注
1不超过轴瓦双边间隙0.70倍DL/T 827、DL/T 507、GB/T 32584、GB/T 15468、GB/T 8564越限超标
2不超过轴瓦双边间隙0.75倍DL/T 817、NB/T 42052、GB/T 22581、GB/T 7894越限超标
3未明确运行摆度限制NB/T 42127仅盘车摆度,未涉及稳定摆度
4明确摆度
限制值
GB/T 11348.5超标有缓冲区
), ArticleFig(id=1236369230787040219, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222918525335, language=EN, label=Tab.12, caption=

Statistics of speed range expressions

, figureFileSmall=null, figureFileBig=null, tableContent=
转速区间/(r·min–1)标准号
100≤n<250DL/T 817、DL/T 827、NB/T 42127、GB/T 8564、GB/T 21718、GB/T 7894、GB/T 15468
>100~250NB/T 42052、DL/T 507、GB/T 11348.5、GB/T 22581、GB/T 32584
), ArticleFig(id=1236369230879314914, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222918525335, language=CN, label=表12, caption=

评价标准的转速区间表述统计

, figureFileSmall=null, figureFileBig=null, tableContent=
转速区间/(r·min–1)标准号
100≤n<250DL/T 817、DL/T 827、NB/T 42127、GB/T 8564、GB/T 21718、GB/T 7894、GB/T 15468
>100~250NB/T 42052、DL/T 507、GB/T 11348.5、GB/T 22581、GB/T 32584
), ArticleFig(id=1236369231013532649, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222918525335, language=EN, label=Tab.13, caption=

Classification of evaluation criteria

, figureFileSmall=null, figureFileBig=null, tableContent=
序号评价准则标准号
1评价准则ⅠGB/T 11348.5 GB/T 32584
2评价准则ⅡGB/T 11348.5 GB/T 32584
3评价准则ⅢDL/T 817、NB/T 42052、NB/T 42127、DL/T 507、GB/T 15468、GB/T 8564、GB/T 21718、GB/T 22581、GBT 7894
), ArticleFig(id=1236369231202276337, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222918525335, language=CN, label=表13, caption=

评价标准的评价准则分类

, figureFileSmall=null, figureFileBig=null, tableContent=
序号评价准则标准号
1评价准则ⅠGB/T 11348.5 GB/T 32584
2评价准则ⅡGB/T 11348.5 GB/T 32584
3评价准则ⅢDL/T 817、NB/T 42052、NB/T 42127、DL/T 507、GB/T 15468、GB/T 8564、GB/T 21718、GB/T 22581、GBT 7894
), ArticleFig(id=1236369231323911164, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222918525335, language=EN, label=Tab.14, caption=

Classification of evaluation conditions

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序号评价工况分类标准号
1评价工况ⅠGB/T 11348.5、GB/T 15468
2评价工况ⅡGB/T 11348.5、GB/T32584、DL/T 817、GB/T 7894、GB/T 8564、GB/T 21718、GB/T 7894、NB/T 42127
3评价工况ⅢGB/T32584、GB/T 22581
4评价工况ⅣDL/T 827、DL/T507、NB/T 42052
), ArticleFig(id=1236369231416185855, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222918525335, language=CN, label=表14, caption=

评价标准的评价工况分类

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序号评价工况分类标准号
1评价工况ⅠGB/T 11348.5、GB/T 15468
2评价工况ⅡGB/T 11348.5、GB/T32584、DL/T 817、GB/T 7894、GB/T 8564、GB/T 21718、GB/T 7894、NB/T 42127
3评价工况ⅢGB/T32584、GB/T 22581
4评价工况ⅣDL/T 827、DL/T507、NB/T 42052
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水电机组振动评价和测点布置现行标准对比分析
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李志华 1 , 李明 2 , 王远洪 2 , 王猛 3 , 郭金忠 2 , 刘殿程 2 , 夏绍云 1 , 马优 1 , 周科衡 2
热力发电 | 电力系统低碳转型研究专题 2024,53(11): 38-46
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热力发电 | 电力系统低碳转型研究专题 2024, 53(11): 38-46
水电机组振动评价和测点布置现行标准对比分析
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李志华1 , 李明2 , 王远洪2, 王猛3, 郭金忠2, 刘殿程2, 夏绍云1, 马优1, 周科衡2
作者信息
  • 1.西安热工研究院有限公司,陕西 西安 710054
  • 2.华能澜沧江水电股份有限公司,云南 昆明 650206
  • 3.郑州航天电子技术有限公司,河南 郑州 450066
  • 李志华(1983),男,硕士,高级工程师,主要研究方向为水力发电机组监督、流场分析、故障诊断、调节控制系统性能测试等,

通讯作者:

李明(1986),男,硕士,高级工程师,主要研究方向为水电机组运维检修及技术管理,
Comparative analysis of current standards for vibration evaluation and measuring points layout in hydropower units
Zhihua LI1 , Ming LI2 , Yuanhong WANG2, Meng WANG3, Jinzhong GUO2, Diancheng LIU2, Shaoyun XIA1, You MA1, Keheng ZHOU2
Affiliations
  • 1.Xi’an Thermal Power Research Institute Co., Ltd., Xi’an 710054, China
  • 2.Huaneng Lancang River Hydropower Co., Ltd., Kunming 650206, China
  • 3.Zhengzhou Aerospace Electronic Technology Co., Ltd., Zhengzhou 450066, China
出版时间: 2024-11-25 doi: 10.19666/j.rlfd.202402027
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比对了行业标准和国家标准中关于水电机组振动/摆度的越限评价和测点布置要求,阐述了工程现场振动/摆度测点的布置等,发现评价标准、测点布置标准和工程现场之间出现了振动评价边界条件、评价准则、评价工况、测点布置等不一致或不明确的现象。分析发现:各标准间不统一之处均出现在固定部件的振动评价和测点布置,对机组轴系径向振动(摆度)的规定相对统一;各标准中的不一致现象,不利于标准广谱应用,且容易产生歧义和分歧;评价标准和测点标准不一致的现象,不利于大型或者巨型机组现场全面振动评价;所有标准中评价准则中缺少振幅越限幅度与累计时长权重系数考虑,不利于水电机组新型角色下振动故障及状态检修开展和数据积累。该结论可为水电机组振动标准编制、安装验收、运行管理和科研试验等从业人员提供帮助和参考。

振动  /  摆度  /  振动评价  /  测点布置  /  不统一

The requirements of over limit evaluation and measuring points layout of vibration/swing in hydropower units in industry standards and national standards are compared. The layout of vibration/swing measurement points on the project site is also described. It is found that the standards related to evaluation and the ones related to measuring points arrangement are inconsistent or unclear with the engineering site, such as vibration evaluation boundary conditions, evaluation criteria, evaluation working conditions and measuring points arrangement. Analysis shows that all the differences between the standards appear in vibration evaluation and measuring points arrangement for fixed parts, and the provisions on radial vibration (swing) of the unit shafting are relatively unified. Inconsistencies in all standards are not conducive to broad-spectrum application, and are prone to ambiguity and disagreement. The phenomenon that the evaluation standard is inconsistent with the measuring points standard, is not conducive to on-site comprehensive vibration evaluation of large or giant units. All the standard evaluation criteria lack the consideration of weight coefficient of amplitude exceeding the limit and cumulative duration, which is not conducive to the development of vibration fault and condition based maintenance, and data accumulation in the new role of hydropower units. The conclusion is expected to provide analytical help and reference for the practitioners of vibration standard compilation, installation and acceptance, operation management and scientific research and test of hydropower units.

vibration  /  swing  /  vibration evaluation  /  measuring points arrangement  /  disunity
李志华, 李明, 王远洪, 王猛, 郭金忠, 刘殿程, 夏绍云, 马优, 周科衡. 水电机组振动评价和测点布置现行标准对比分析. 热力发电, 2024 , 53 (11) : 38 -46 . DOI: 10.19666/j.rlfd.202402027
Zhihua LI, Ming LI, Yuanhong WANG, Meng WANG, Jinzhong GUO, Diancheng LIU, Shaoyun XIA, You MA, Keheng ZHOU. Comparative analysis of current standards for vibration evaluation and measuring points layout in hydropower units[J]. Thermal Power Generation, 2024 , 53 (11) : 38 -46 . DOI: 10.19666/j.rlfd.202402027
我国水电资源丰富,目前为止我国已建成投产的水电机组装机容量超过3.9亿kW,其中常规电站水电机组装机容量已超过3.5亿kW,抽水蓄能电站可逆式水电机组装机容量超过0.4亿kW,水电机组装机总容量和数量均位居世界第一。水电机组参数、形式、结构等均较繁多,则主流常规水力发电机组按照水轮机和发电机及可调部件名称归纳,具体见表1
水电机组在新型电力系统结构下,具有调峰、调频、调相、备用电源等调节作用,其工作环境较为恶劣、瞬变。因其承担瞬变调峰能力较强,机组大部分转动部件和部分固定部件均承受水力-机械-电磁耦合作用力,金属部件瞬变应力释放常伴随着复杂、多变的非线性剧烈振动[1-6]。因此,在水电机组生产运行过程中监视其振动摆度的幅值和变化趋势至关重要。机组振动评价和测点设置标准在生产中应用较为广泛。基于旋转机械测点位置及频谱特性,利用支持向量回归和变分模态基本原理,关于机组故障诊断开发及一些振动特性方面的研究[7-10],在水电机组振动边界和机组运行性能的评价方面取得了较好的效果。
水电机组无论是新机组投产、修后启动还是稳定运行期间,需依据技术标准进行振动幅值测量和评价。因其结构尺寸、结构形式、主要参数等较为复杂,故涉及水电机组振动评价和测点布置的标准也很多,现行行业标准和国家标准共有15本。其中,行业标准6本,国家标准9本,与国际对标2本,涉及机组测点布置的行业标准/国家标准有1本/2本。具体标准名称、编号等的统计见表2
笔者详细研究了现行的15本标准,因水电机组尺寸跨度大,结构形式、机组类型繁多,运行参数差异大和标准制定的年代等客观因素,为了避免不同机型、不同参数、不同容量出现混淆情况,特对标准适用范围进行了统计,结果见表3。比对发现:存在标准中部件命名不统一,甚至工程实际中已安装测点,但是缺少评价标准;或者测点布置标准中有要求,但是评价标准中无评价指标等现象。现对国家标准和行业标准中不一致、不完善、数值不统一等问题和矛盾,进行列举和分析。
为了便于分析比对相关差异,将表2表3中标准分为评价标准和测点布置标准。评价标准包括:DL/T 817、DL/T 827、NB/T 42052、NB/T 42127、DL/T 507、GB/T 15468、GB/T 8564、GB/T 11348.5、GB/T 21718、GB/T 22581、GB/T32584、GBT 7894。测点布置标准包括:GB/T 28570、GB/T 17189、DL/T 556。
机械振动为物体或者物体的一部分在某一中心位置两侧所做的往复运动,谐振是最简单的机械振动。水电机组振动是指顶盖、机架、铁芯和机座或者其中一部分在机组旋转运行时,因自身和水力、电气等原因产生的相对于平衡位置随时间的往复变化,其振动通常采用低频速度传感器进行测量,一般指绝对振动。
水电机组摆度即运动物体做圆周运动时往复摆动的幅度。水电机组摆度分为盘车摆度和运行摆度,本文重点讨论运行摆度。水电机组运行摆度为水电机组转动部分的运动中心和固定部分的几何中心的相对偏差,即转动部分相对几何中心发生量值大小及方向连续不断地交替变化的相对振动[11],通常采用非接触涡流传感器进行测量,一般指相对振动。
为了实现机组各部位振摆监视和保护,大型或者巨型轴流式机组和混流式机组近年工程现场布置的在线监测和振摆保护测点主要有:机组X/–Y方向顶盖水平振动、X/–Y方向顶盖垂直振动、X/–Y方向下机架水平振动、X/–Y方向下机架垂直振动、X/–Y方向上机架水平振动、X/–Y方向上机架垂直振动、X/–Y方向定子铁芯水平振动、X/–Y方向定子铁芯垂直振动、X/–Y方向定子机座水平振动、X/–Y方向定子机座垂直振动、X/–Y方向水导摆度、X/–Y方向下导摆度、X/–Y方向上导摆度等摆振测点。大型或者巨型贯流式机组在线监测和振摆保护测点主要有:+X/–Y/+Z方向水导轴承径振动、+X/–Y/+Z方向组合轴承振动、+X/–Y/+Z方向灯泡头振动、X/–Y方向水导轴承摆度、X/–Y方向组合轴承摆度等测点。大型或者巨型轴流式机组和混流式机组一般设置6个摆度测点,20个振动测点,1个键相测点;大型或者巨型贯流式机组一般设置4个摆度测点,9个振动测点,1个键相测点。上述测点涉及传感器类型有低频速度传感器和非接触涡流传感器2种,工程应用现场振摆测点与标准均存在一定差异。
分别按照双幅振动、通频及倍频双幅振动和驱动/非驱动端安装位置区分的分类统计12本“评价标准”中的测点评价名称及对应标准编号,结果见表4表6[12-27]
统计3本“测点标准”中对振摆测点布置的描述,见表7表8[24-26],其中表8比较了GB/T 28570和DL/T 556关于测点布置的要求,二者在不同容量发电机关于测点布置个数有所增减。
GB32584、GB/T 11348.52标准采用概率统计的方法,将机组相对摆度运行的限制划分为A、B、C 3区进行评价,并将主轴摆度描述为径向振动或者轴振,其余评价标准均采用机组摆度的叫法,评价准则均采用不大于导瓦双面(总)间隙的70%或75%的评价边界。摆度标准的评价较为统一,仅越限数值不同。
根据表4表8内容并结合工程现场设置的测点,发现15本关于水电机组振动测点布置和评价准则有4种不统一之处可归纳为如下。
振动特征描述。通频幅值为某点随平衡位置往复变化所有频段的叠加幅值。倍频幅值为某点随平衡位置往复变化N倍转频/工频叠加幅值,通频和倍频均按照频谱倍数进行的定义。双幅振动为某点随平衡位置往复变化时在1个周期或多个周期内的最大波峰-波谷幅值。
水电机组任何一个部位的振动均可分解为通频双幅振动值、转频双幅振动值、通频单幅振动值、转频单幅振动、极频双幅振动值等特征量进行分析和评价,因测点位置不同监视部件振动特征亦不同。“评价标准”中关于双幅振动、通频振动、转频振动、极频振动的分类见表9。由表9可以看出,“评价标准”中大部分明确了双振幅值,但也存在未明确采用通频还是转频的情况,其中DL/T 827对振幅和频谱均未明确。虽然在工程现场应用中通常采用通频双幅和转频双幅进行振动量级的评价,但鉴于标准的权威性,为了使机组振动评价更科学合理,验收评价、性能评价及振动区评价结果无争议,“评价标准”应明确测点位置幅值边界和频谱类型。
根据振动频谱分析傅里叶变换至频谱计算基本公式可知,电磁原因振动幅值采用通频容易被弱化失真,水力原因振动幅值采用通频容易被放大失真,机械因素振动幅值因悬臂结构和分块结构采用通频失真的原因各不相同。因此,不同频谱振动幅值计算和实测值差异较大,甚至影响评价结论,某厂振动幅值统计见表10,可见不同频谱结果差异较大。
1)振动数值在“评价标准”中,对相同转速区间振动越限值规定不统一。如文献[18]对转速在100 r/min以内的机组定子机座中双幅振动值较文献[23]及其他“评价标准”大10 μm;文献[18]中采用转频双幅振动值进行评价,而文献[23]未明确转频还是通频,标准之间存在不一致的地方。又如:关于机组转速在375≤n<750 r/min内立轴式水轮机顶盖的水平振动值和垂直振动值,文献[16]和文献[23]较其他“评价标准”评价边界值分别大10 μm和20 μm。
2)摆度数值“评价标准”中对机组摆度值规定有2种要求:摆度限值Ⅰ为主轴摆度(振动)双幅值不超过轴承总(双边)间隙的70%或符合机组合同规定;摆度限值Ⅱ为主轴摆度(振动)双幅值不超过轴承总(双边)间隙的75%。统计结果见表11
转速是水电机组核心参数之一,其大小与振动幅值关系较为密切,因此在振动评价和故障分析中转速也是关键标示参数之一。以100 r/min和250 r/min转速的机组为例,总结“评价标准”对转速的划分主要有2种:转速区间描述Ⅰ为100 r/min≤n<250 r/min;转速区间描述Ⅱ为大于100~250 r/min,统计结果见表12
机组转速区间为大于100~250 r/min时,按照数学意义区间定义可理解为:1、[250, +∞)区间内的数据;2、(100, 250]区间内的数据;3、(100,250)区间内的数据;4、[100, 250)区间内的数据。结合标准转速划分,则上述转速区间用100 r/min≤n<250 r/min的表述方法更为规范和准确。
在“评价标准”中,有些标准采用了发电机驱动端、非驱动端和水导轴承描述机组不同部位,该描述方式与工程现场常用及文献[27]机电设备名称不一致。虽然该标准中对上述部位名称进行了图示解释,与工程现场和水电机组振动特征监测还有差距。如文献[22]水导轴承的振动测点,从标准示意图中并不能分辨出是顶盖振动还是水导油盆处测点。虽然部分小机组和贯流式机组因顶盖尺寸较小,现场将水导振动测点布置于水导油盆盖板上,但大中型和巨型机组顶盖振动测点均布置于顶盖上,且“测点标准”中明确要求应为顶盖振动而非油盆盖板上的振动,这在机组现场振动评价中容易产生偏差或歧义。故根据水电机组特点可将文献[22]标准中的发电机驱动端理解为其他标准中的下导或组合轴承或下机架处,发电机非驱动端理解为其他标准中的上导或者滑环端或上机架处。标准应根据不同部位不同振动量产生的破坏特征规范测点描述,以免产生歧义。
表7可见,“测点标准”中规定立式水电机组应设置定子机座垂直振动测点、定子铁芯水平/垂直振动测点,“评价标准”中无垂直振动的评价边界和指标,且大型或者巨型机组均布置了该测点。“测点标准”规定贯流式机组应布置组合轴承、水导轴承轴向水平测点,“评价标准”无水导轴承轴向测点的振动评价边界和数据,且大型或者巨型贯流机组均布置了该测点。“测点标准”规定卧式机组各轴承均需安装垂直振动测点和水平振动测点,但部分“评价标准”中只有水平振动评价边界和数据,未规定垂直振动评价边界和数据,详见表4表6。“测点标准”和“评价标准”之间未完全统一。
“评价标准”的评价准则概括以下3种:
1)准则Ⅰ利用振幅进行评价,采用A、B、C 3个区进行振动和摆度评价,其中A区为可接受区域,B区为采取进一步措施减低振动或者观察区域,C区为需立即停机查明原因区域。3个区域的划分是通过采集不同机组的振动数据,利用概率统计并符合Burr分布规律,按照50%置信概率得到的边界线值。3个区域的划分具有很强的工程应用背景。
2)准则Ⅱ变化幅值评价准则,即根据机组振动变化趋势,振动幅值随着时间显著变化,变化量超过基准值的25%,表示可能事故已经发生或者即将发生,应立即停机检查原因。
3)准则Ⅲ机组某部位在评价工况下通频或转频双幅振动幅值超过边界限制值,即为超标或者禁止运行情况。
“评价标准”中的评价准则统计分类见表13
评价准则Ⅰ和评价准则Ⅲ均设置了振动幅值越限边界,但准则Ⅰ根据工程应用实践结果设置了1个缓冲区即B-C区间,有较强的工程应用背景,更贴近工程实际。评价准则Ⅲ系多数标准中采用的评价准则,与评价准则Ⅰ和Ⅱ有区别,因其定义简单、容易执行,在水电机组振动评价中受到广泛采用。
众所周知,机组部件破坏的特征值变化是一个渐变过程,或在某个工况和转速下才出现的渐变过程,且振动幅值变大小均为异常情况,并非越限才产生破坏。准则Ⅱ充分考虑了机组振动幅值的变化趋势、变化速率、变化数量级、变化外部因素等得出了评价准则,采用该准则评价机组振动破坏征兆更贴近实际。准则Ⅱ基准值获取受工况相同、运行参数相同、外部环境因素相同等诸多边界限制,准确获得基准数据较为困难。
根据工程实践情况,采用幅值越限即超标评价机组振摆与工程实际存在偏差,因此,在机组振动评价中应充分考虑到评价准则的不一致性和应用性。特别是在设计制造阶段、投产验证阶段和生产管理阶段应明确评价准则,在生产过程中应严密监视各部位的振摆变化幅值,根据变化幅值进行决策。
“评价标准”中的评价工况可以概括为以下3种:1)评价工况Ⅰ,机组在除过速运行以外的各种运行工况;2)评价工况Ⅱ,机组在除过速运行以外的各种稳定运行工况;3)评价工况Ⅲ,带负荷工况即立式混流式机组70%~100%额定功率和立式水斗式机组25%~100%额定功率、其余机型均35%~100%额定功率运行;4)评价工况Ⅳ,未明确工况。根据“评价标准”中的评价工况分别进行统计,结果见表14
水电机组自静止至满负荷运行大致可分为空转工况、空载工况、小负荷工况、稳定负荷工况、穿越振动区工况和过渡过程工况。其中,过渡过程工况包括停机惰走工况、开机工况、过速工况和事故停机工况。空转工况主要考察机组转动部分质量平衡情况、轴系轨迹、瓦温瓦隙等制造、安装质量。空载工况主要考验发电机经历无励磁、气隙磁通线性、气隙磁通膝点、气隙磁通非线性近饱和等几种磁场变化后,发电机振动特征的表现形式的工况。空载工况下每个阶段因谐波励磁磁场强度不同,会出现不同的磁拉力、机架或基座的振动频率和振动幅值。小负荷、稳定负荷、穿越振动区工况因导叶开度不同,机组流量、水流冲角不同,以及固定导叶与活动导叶叶道间的流速不同,水流速度水头不同,对固定高强度部件冲击形成的弹性振动特征不同,局部压力下负压面积和间隙射流流速不同,而造成振动特征不同。水电机组在不同的阶段和不同工况其振动特征或振动因变量均不一致,且幅值各有差异,因此在振动评价中应明确评价工况。
根据水电机组的运行特点,评价工况Ⅰ应包括空转工况、空载工况、小负荷工况、稳定负荷工况、穿越振动区工况和部分过渡过程工况;评价工况Ⅱ应包括空转工况、空载工况、小负荷工况和稳定负荷工况;评价工况Ⅲ仅包括带负荷工况,对机组带负荷情况亦进行了具体规定,不包括空转、空载、小负荷、穿越振动区和过渡过程等工况;评价工况Ⅳ可理解为空转工况、升速开机和降速停机等过渡过程或稳定运行工况等。因此,评价工况Ⅰ、评价工况Ⅱ、评价工况Ⅲ、评价工况Ⅳ在水电机组振动评价中的适用范围不同,在使用中应加以区分,避免在工程应用中出现歧义或偏差。
因水电机组受尺寸跨度大,结构形式、机型、运行参数繁多等客观因素的影响,相同机型和参数不同标准中确实存在振动评价边界不统一、测点名称不统一、振动评价准则不统一和振动评价工况不统一的现象,对标准广谱应用和现场振动评价不利,易产生分歧。按照“测点标准”的相关要求,“评价标准”缺少相应测点评价边界数据,不利于大型或者巨型机组现场振动评价,容易产生争议。因涉及振动的标准较多且有诸多不统一,因此部分工程现场未按照“测点标准”布置相关测点,不利于机组振动监测和评价。在此呼吁在标准制定时,应对测点布置位置、转速区间描述等做到准确、规范和统一,避免歧义,提高标准的约束性和广谱性;在标准应用时,根据机组特点规避部分标准的不足。
评价准则Ⅰ、评价准则Ⅱ和评价准则Ⅲ均未涉及越限振幅下运行时间影响系数和振幅越限程度影响系数之间的关系,即振动越限较小时长周期累计运行时间对机组造成的损伤程度,与振动越限较大时短时间运行对机组造成的损伤程度的比较和关联。振动水平较低越限长时间运行时加权系数在机组振动中如何分级,如何设置较为合理,同样振动越限较大短时间运行情况的加权系数如何设置。实现机组状态检修和智慧电厂须面临相同的问题。因此,呼吁标准制定单位、工程应用单位和生产管理单位应补充研究和完善标准中系数和数据。
随着大量光伏和风电等清洁能源接入电网,水电机组在电网中参与调峰调频的任务越来越重要。水电机组从带基负荷发电的角色逐渐向调峰调频的角色转变,评价工况Ⅱ和评价工况Ⅲ亦不能很好的适应在未来能源结构背景下对水电机组振动评价的需求,因此在标准修编和应用时应明确评价工况。
在应用评价准则评价机组摆度值越限或超标时,均采用0.70/0.75静态双边间隙进行摆度越限评价,未考虑动态间隙偏差对机组摆度测量的影响,因此建议在摆度评价时应参考分块瓦瓦温偏差对摆度间接反映,以客观评价机组摆度水平。
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2024年第53卷第11期
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doi: 10.19666/j.rlfd.202402027
  • 接收时间:2024-02-29
  • 首发时间:2026-03-05
  • 出版时间:2024-11-25
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  • 收稿日期:2024-02-29
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    1.西安热工研究院有限公司,陕西 西安 710054
    2.华能澜沧江水电股份有限公司,云南 昆明 650206
    3.郑州航天电子技术有限公司,河南 郑州 450066

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李明(1986),男,硕士,高级工程师,主要研究方向为水电机组运维检修及技术管理,
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
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多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
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