Article(id=1236369222989837299, tenantId=1146029695717560320, journalId=1210938733613449225, issueId=1236369220812984708, articleNumber=null, orderNo=null, doi=10.19666/j.rlfd.202403044, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1711382400000, receivedDateStr=2024-03-26, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1772702993390, onlineDateStr=2026-03-05, pubDate=1732464000000, pubDateStr=2024-11-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1772702993390, onlineIssueDateStr=2026-03-05, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1772702993390, creator=13701087609, updateTime=1772702993390, 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=130, endPage=138, ext={EN=ArticleExt(id=1236369223740616704, articleId=1236369222989837299, tenantId=1146029695717560320, journalId=1210938733613449225, language=EN, title=Selection method for identification data of steam turbine work model considering excitation characteristics, columnId=1211002409397129992, journalTitle=Thermal Power Generation, columnName=Power generation technology forum, runingTitle=null, highlight=null, articleAbstract=
A method of identifying data by considering the excitation characteristics is proposed to solve the problem that it is difficult to select suitable samples from the historical operation data to identify the turbine work model. Firstly, Fisher’s information matrix condition number is applied to extract the excitation characteristics of the historical operating data, which together with the trend characteristics and the correlation between parameters constitute the set of feature variables. Secondly, by using the feature variables as inputs and the identification results generated based on the standard turbine work model as outputs, the Random Forest classification algorithm is used to generate a classification rule model for the identification data to realize the online selection of identification data. Finally, the accuracy of the model classification results and the identification effect of the selected data are verified. The result proves that the accuracy of the classification rule model is 97.561%, which can accurately select the sample segments containing sufficient incentives in the historical operation data, and the identification results of the turbine work model are in high consistency with that of the the standard model.
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针对历史运行数据中难以选择合适样本辨识汽轮机做功模型问题,提出一种考虑激励特性的辨识数据优选方法。首先,采用费歇尔(Fisher)信息矩阵条件数提取历史运行数据的激励特性,与数据的趋势特性和参数间相关性共同构成特征变量集。其次,以特征变量作为输入,基于标准汽轮机做功模型生成的标识结果作为输出,采用随机森林分类算法生成辨识数据分类规则模型,实现辨识数据的在线选择。最后,对模型分类结果的准确性与所选数据的辨识效果进行验证。结果表明,分类规则模型的准确度为97.561%,可准确选出历史运行数据中含有充分激励的样本段,其汽轮机做功模型辨识结果与标准模型具有较高的一致性。
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2.School of Control and Computer Engineering, North China Electric Power University, Beijing 102206, China), AuthorCompanyExt(id=1236369227083477152, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222989837299, companyId=1236369227066699932, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2.华北电力大学控制与计算机工程学院,北京 102206)])], figs=[ArticleFig(id=1236369229251932436, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222989837299, language=EN, label=Fig.1, caption=
Structural diagram of the turbine work model, figureFileSmall=4jGM7EtvJnljTCFtTvqKaw==, figureFileBig=fa8VZwTsy7g+9JSglCNHVw==, tableContent=null), ArticleFig(id=1236369229327429913, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222989837299, language=CN, label=图1, caption=
汽轮机做功模型结构, figureFileSmall=4jGM7EtvJnljTCFtTvqKaw==, figureFileBig=fa8VZwTsy7g+9JSglCNHVw==, tableContent=null), ArticleFig(id=1236369229524562211, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222989837299, language=EN, label=Fig.2, caption=
Block-chart of the identification data selection method, figureFileSmall=tRQQvgZyrk5LFE8stmnqrg==, figureFileBig=QyWgxZKz+XL6p0yUYSaBZw==, tableContent=null), ArticleFig(id=1236369229616836903, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222989837299, language=CN, label=图2, caption=
辨识数据优选方法框架, figureFileSmall=tRQQvgZyrk5LFE8stmnqrg==, figureFileBig=QyWgxZKz+XL6p0yUYSaBZw==, tableContent=null), ArticleFig(id=1236369229692334377, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222989837299, language=EN, label=Fig.3, caption=
Schematic diagram of the random forest classification algorithm, figureFileSmall=nNxTSQrWeXuWpgBBXqyJAg==, figureFileBig=5Ydsx6CvXHOhfiBLkncmYg==, tableContent=null), ArticleFig(id=1236369229784609069, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222989837299, language=CN, label=图3, caption=
随机森林分类算法示意, figureFileSmall=nNxTSQrWeXuWpgBBXqyJAg==, figureFileBig=5Ydsx6CvXHOhfiBLkncmYg==, tableContent=null), ArticleFig(id=1236369229864300851, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222989837299, language=EN, label=Fig.4, caption=
Identify data selection methods for random forest classification algorithm, figureFileSmall=nIWMaEG36Gd410PI/qcujQ==, figureFileBig=hfcc2FtCIkB7/EeMHI0l+Q==, tableContent=null), ArticleFig(id=1236369229952381235, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222989837299, language=CN, label=图4, caption=
基于随机森林分类的辨识优选模型构造方法, figureFileSmall=nIWMaEG36Gd410PI/qcujQ==, figureFileBig=hfcc2FtCIkB7/EeMHI0l+Q==, tableContent=null), ArticleFig(id=1236369230048850233, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222989837299, language=EN, label=Fig.5, caption=
Fisher information matrix conditional number curves for identified data, figureFileSmall=nyqwy2RpyWrc0tTPo8Dx7w==, figureFileBig=bRaOBjjG3po8wO08rQSMfA==, tableContent=null), ArticleFig(id=1236369230145319226, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222989837299, language=CN, label=图5, caption=
辨识数据Fisher信息矩阵条件数曲线, figureFileSmall=nyqwy2RpyWrc0tTPo8Dx7w==, figureFileBig=bRaOBjjG3po8wO08rQSMfA==, tableContent=null), ArticleFig(id=1236369230271148348, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222989837299, language=EN, label=Fig.6, caption=
Significant scores for data characterization, figureFileSmall=+6j+wEWXqfnC2Vjz1CULmw==, figureFileBig=03Z555MgwkG4NB0kHAKP5w==, tableContent=null), ArticleFig(id=1236369230376005949, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222989837299, language=CN, label=图6, caption=
数据特征重要性, figureFileSmall=+6j+wEWXqfnC2Vjz1CULmw==, figureFileBig=03Z555MgwkG4NB0kHAKP5w==, tableContent=null), ArticleFig(id=1236369230464086336, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222989837299, language=EN, label=Fig.7, caption=
Historical operation data of a unit, figureFileSmall=cw6obrNghZxS0OOkgadImw==, figureFileBig=Iu/hRYZh1LQwrxfQ+rWvAA==, tableContent=null), ArticleFig(id=1236369230577332549, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222989837299, language=CN, label=图7, caption=
某机组历史运行数据, figureFileSmall=cw6obrNghZxS0OOkgadImw==, figureFileBig=Iu/hRYZh1LQwrxfQ+rWvAA==, tableContent=null), ArticleFig(id=1236369230677995848, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222989837299, language=EN, label=Fig.8, caption=
Model Accuracy curve, figureFileSmall=w37XtMCWk/Mlen8iiCdEhQ==, figureFileBig=L79njGCQFjEWIc7iGf/aDg==, tableContent=null), ArticleFig(id=1236369230791242060, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222989837299, language=CN, label=图8, caption=
模型精确度曲线, figureFileSmall=w37XtMCWk/Mlen8iiCdEhQ==, figureFileBig=L79njGCQFjEWIc7iGf/aDg==, tableContent=null), ArticleFig(id=1236369230879322447, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222989837299, language=EN, label=Fig.9, caption=
Data classification results for verification set, figureFileSmall=1sCxeCQ3nnzWg4qzCN/uZg==, figureFileBig=BDluWOwb8VTMXjK+GefBNw==, tableContent=null), ArticleFig(id=1236369230979985747, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222989837299, language=CN, label=图9, caption=
验证集数据分类结果, figureFileSmall=1sCxeCQ3nnzWg4qzCN/uZg==, figureFileBig=BDluWOwb8VTMXjK+GefBNw==, tableContent=null), ArticleFig(id=1236369231063871831, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222989837299, language=EN, label=Fig.10, caption=
Comparison of response curves for parameter identification using different data samples, figureFileSmall=CiMkBv+ys5EcCOWAb41jng==, figureFileBig=W4X69jmlz619Rtl7r/JD8g==, tableContent=null), ArticleFig(id=1236369231135175003, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222989837299, language=CN, label=图10, caption=
参数辨识结果的响应曲线对比, figureFileSmall=CiMkBv+ys5EcCOWAb41jng==, figureFileBig=W4X69jmlz619Rtl7r/JD8g==, tableContent=null), ArticleFig(id=1236369231210672479, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222989837299, language=EN, label=Tab.1, caption=
Feature variables
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| 特征 | 符号 | 名称 |
|---|
| 数据趋势特征 | μ1 | 主蒸汽流量的均值 |
| μ2 | 机组负荷的均值 |
| σ1 | 主蒸汽流量的标准差 |
| σ2 | 机组负荷的标准差 |
| c1 | 主蒸汽流量的变异系数 |
| c2 | 机组负荷的变异系数 |
| M1 | 主蒸汽流量的极差 |
| M2 | 机组负荷的极差 |
| ΔM1 | 主蒸汽流量的众数带 |
| ΔM2 | 机组负荷的众数带 |
| 参数间相关特征 | r | 主蒸汽流量与机组负荷的相关系数 |
| 数据激励特征 | η | 主蒸汽流量与机组负荷的Fisher信息矩阵条件数 |
), ArticleFig(id=1236369231307141475, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222989837299, language=CN, label=表1, caption=
特征变量
, figureFileSmall=null, figureFileBig=null, tableContent=
| 特征 | 符号 | 名称 |
|---|
| 数据趋势特征 | μ1 | 主蒸汽流量的均值 |
| μ2 | 机组负荷的均值 |
| σ1 | 主蒸汽流量的标准差 |
| σ2 | 机组负荷的标准差 |
| c1 | 主蒸汽流量的变异系数 |
| c2 | 机组负荷的变异系数 |
| M1 | 主蒸汽流量的极差 |
| M2 | 机组负荷的极差 |
| ΔM1 | 主蒸汽流量的众数带 |
| ΔM2 | 机组负荷的众数带 |
| 参数间相关特征 | r | 主蒸汽流量与机组负荷的相关系数 |
| 数据激励特征 | η | 主蒸汽流量与机组负荷的Fisher信息矩阵条件数 |
), ArticleFig(id=1236369231386833255, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222989837299, language=EN, label=Tab.2, caption=
The sample data
, figureFileSmall=null, figureFileBig=null, tableContent=
| 编号 | 数据起止时间 | 样本工况 | 样本数据量 |
|---|
| a | 2023年8月2日06:19:57—09:06:37 | 48% | 10 000 |
| b | 2023年7月14日07:26:37—10:13:17 | 57% | 10 000 |
| c | 2023年7月31日15:46:57—18:33:37 | 82% | 10 000 |
), ArticleFig(id=1236369231458136427, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222989837299, language=CN, label=表2, caption=
样本数据
, figureFileSmall=null, figureFileBig=null, tableContent=
| 编号 | 数据起止时间 | 样本工况 | 样本数据量 |
|---|
| a | 2023年8月2日06:19:57—09:06:37 | 48% | 10 000 |
| b | 2023年7月14日07:26:37—10:13:17 | 57% | 10 000 |
| c | 2023年7月31日15:46:57—18:33:37 | 82% | 10 000 |
), ArticleFig(id=1236369231684628847, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222989837299, language=EN, label=Tab.3, caption=
Confusion matrix
, figureFileSmall=null, figureFileBig=null, tableContent=
), ArticleFig(id=1236369231776903540, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222989837299, language=CN, label=表3, caption=
混淆矩阵
, figureFileSmall=null, figureFileBig=null, tableContent=
), ArticleFig(id=1236369231877566842, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222989837299, language=EN, label=Tab.4, caption=
Comprehensive performance comparison of classification models
, figureFileSmall=null, figureFileBig=null, tableContent=
| 评价指标 | 适宜辨识数据(标识“1”) |
|---|
| DT | SVM | KNN | RF |
|---|
| Recall | 0.769 23 | 0.769 23 | 0.428 57 | 1.000 00 |
| Precision | 0.769 23 | 0.833 00 | 0.230 76 | 0.947 37 |
| F-score | 0.769 23 | 0.799 84 | 0.299 99 | 0.972 97 |
| 分类模型运行时间/s | 0.641 | 0.215 | 0.822 | 0.156 |
), ArticleFig(id=1236369231982424446, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1236369222989837299, language=CN, label=表4, caption=
各分类模型综合评价指标对比
, figureFileSmall=null, figureFileBig=null, tableContent=
| 评价指标 | 适宜辨识数据(标识“1”) |
|---|
| DT | SVM | KNN | RF |
|---|
| Recall | 0.769 23 | 0.769 23 | 0.428 57 | 1.000 00 |
| Precision | 0.769 23 | 0.833 00 | 0.230 76 | 0.947 37 |
| F-score | 0.769 23 | 0.799 84 | 0.299 99 | 0.972 97 |
| 分类模型运行时间/s | 0.641 | 0.215 | 0.822 | 0.156 |
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