Article(id=1222503114687636326, tenantId=1146029695717560320, journalId=1210938733613449225, issueId=1222503107959968541, articleNumber=null, orderNo=null, doi=10.19666/j.rlfd.202212289, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1670688000000, receivedDateStr=2022-12-11, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1769397055551, onlineDateStr=2026-01-26, pubDate=1698163200000, pubDateStr=2023-10-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1769397055551, onlineIssueDateStr=2026-01-26, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1769397055551, creator=13701087609, updateTime=1769397055551, updator=13701087609, issue=Issue{id=1222503107959968541, tenantId=1146029695717560320, journalId=1210938733613449225, year='2023', volume='52', issue='10', pageStart='1', pageEnd='198', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1769397053947, creator=13701087609, updateTime=1773966614026, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1241669232136614309, tenantId=1146029695717560320, journalId=1210938733613449225, issueId=1222503107959968541, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1241669232136614310, tenantId=1146029695717560320, journalId=1210938733613449225, issueId=1222503107959968541, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=86, endPage=94, ext={EN=ArticleExt(id=1222503115006403451, articleId=1222503114687636326, tenantId=1146029695717560320, journalId=1210938733613449225, language=EN, title=Condition monitoring model of HRSG based on PCA-SSA-LSTM, columnId=1211002405299294959, journalTitle=Thermal Power Generation, columnName=Thermal energy science research, runingTitle=null, highlight=null, articleAbstract=
In order to monitor the condition of the heat recovery steam generator (HRSG) and to ensure the healthy operation of the HRSG, the three-pressure main steam temperature and pressure prediction model was established by using the data from the healthy operation of HRSG and combining the three methods of principle component analysis (PCA), sparrow search algorithm (SSA) and long short-term memory (LSTM). PCA was used to reduce the input parameters of the model from 22 to 9 dimensions, and taking the reheat steam temperature prediction model as an example, it was concluded that the model with PCA dimensionality reduction reduced the hyperparameter optimization time by 11.3% compared with the model without PCA dimensionality reduction. Compared with the model without SSA, the value of coefficients of determination of these models is significantly improved, mean absolute error and root mean square error are significantly reduced, and the alarm threshold of the main steam temperature HRSG is determined according to the distribution of absolute error. Therefore, the condition monitoring model of HRSG based on PCA-SSA-LSTM has short training time and high prediction accuracy, and the model provides theoretical basis and technical support for fault monitoring and diagnosis of HRSG in gas turbine combined cycle power plants.
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为了实现对余热锅炉的状态监测,保证余热锅炉的健康运行,使用余热锅炉健康运行时的数据并结合主成分分析(PCA)、麻雀搜索算法(SSA)、长短期记忆网络(LSTM)3种方法建立余热锅炉三压力级主蒸汽温度和压力预测模型。使用PCA将模型输入参数从22维降到9维,并以再热蒸汽温度预测模型为例进行分析,发现经PCA降维的模型与未经PCA降维的模型相比缩减了11.3%的超参数寻优时间。使用SSA对LSTM超参数寻优之后分别建立6个主蒸汽温度、压力预测模型,与未使用SSA的模型相比,这些模型的决定系数有了显著的提升,平均绝对误差与均方根误差有了显著的下降。因此基于PCA-SSA-LSTM的余热锅炉状态监测模型训练时间短,预测精度高,同时该模型给燃气轮机联合循环电厂余热锅炉的故障监测与诊断提供了理论依据和技术支持。
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国洪立(1998),男,硕士研究生,主要研究方向为联合循环机组性能分析和故障诊断,guohongli0731@163.com。
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余热锅炉受热面组成LPEC—低压省煤器;IPEC—中压省煤器;RH—再热器;HPEV—高压蒸发器;LPEV—低压蒸发器;IPEV—中压蒸发器;ATTP—减温器;HPSH—高压过热器;LPSH—低压过热器;IPSH—中压过热器;HPEC—高压省煤器。
, figureFileSmall=aHRymJ2ztPQzIXX7eTlirg==, figureFileBig=S3Q+u147YXdOa+l07B5Fgw==, tableContent=null), ArticleFig(id=1241694381271478671, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503114687636326, language=EN, label=Fig.2, caption=
LSTM network unit structure diagram, figureFileSmall=6nt4e4FALSc1knJvfV2BiA==, figureFileBig=XoMJXuVNGTo7YWc4S3CFyg==, tableContent=null), ArticleFig(id=1241694381393113494, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503114687636326, language=CN, label=图2, caption=
LSTM网络单元结构, figureFileSmall=6nt4e4FALSc1knJvfV2BiA==, figureFileBig=XoMJXuVNGTo7YWc4S3CFyg==, tableContent=null), ArticleFig(id=1241694381506359709, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503114687636326, language=EN, label=Fig.3, caption=
Condition monitoring model establishment flowchart, figureFileSmall=vQo2oyLilMEhMiuVYJkLJw==, figureFileBig=bDZB7lnRxJyWs0K26bE+sQ==, tableContent=null), ArticleFig(id=1241694381590245794, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503114687636326, language=CN, label=图3, caption=
余热锅炉状态监测模型建立流程, figureFileSmall=vQo2oyLilMEhMiuVYJkLJw==, figureFileBig=bDZB7lnRxJyWs0K26bE+sQ==, tableContent=null), ArticleFig(id=1241694381703492011, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503114687636326, language=EN, label=Fig.4, caption=
Initial and filtered data distribution, figureFileSmall=PwybD7HwVU+eI0gR7hG7QQ==, figureFileBig=Ctx0q1Ly+LGXUQlxw9eylQ==, tableContent=null), ArticleFig(id=1241694381778989487, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503114687636326, language=CN, label=图4, caption=
初始以及筛选后的数据分布, figureFileSmall=PwybD7HwVU+eI0gR7hG7QQ==, figureFileBig=Ctx0q1Ly+LGXUQlxw9eylQ==, tableContent=null), ArticleFig(id=1241694381900624310, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503114687636326, language=EN, label=Fig.5, caption=
Cumulative contribution rate of principal components and the change of contribution rate, figureFileSmall=G0wlj4c3x9yHCPD551UR3Q==, figureFileBig=tk1hEGG0zzhilWT+mRBb9g==, tableContent=null), ArticleFig(id=1241694382001287609, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503114687636326, language=CN, label=图5, caption=
主成分累计贡献率以及贡献率的变化, figureFileSmall=G0wlj4c3x9yHCPD551UR3Q==, figureFileBig=tk1hEGG0zzhilWT+mRBb9g==, tableContent=null), ArticleFig(id=1241694382076785085, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503114687636326, language=EN, label=Fig.6, caption=
Fitness function values change plot with number of iterations, figureFileSmall=0Yrm8UuK5X7ucBoC7ZuN5Q==, figureFileBig=XRlG5DIygXOiGBMIrkg0xg==, tableContent=null), ArticleFig(id=1241694382164865474, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503114687636326, language=CN, label=图6, caption=
适应度函数值随迭代次数变化, figureFileSmall=0Yrm8UuK5X7ucBoC7ZuN5Q==, figureFileBig=XRlG5DIygXOiGBMIrkg0xg==, tableContent=null), ArticleFig(id=1241694382231974344, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503114687636326, language=EN, label=Fig.7, caption=
Curves of the predicted and true values of three models, figureFileSmall=xMk+Xao6l0snc32sIYNdcg==, figureFileBig=fpoJwaQRtxENwHcdhkf+jg==, tableContent=null), ArticleFig(id=1241694382303277517, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503114687636326, language=CN, label=图7, caption=
3种模型预测值与真实值曲线, figureFileSmall=xMk+Xao6l0snc32sIYNdcg==, figureFileBig=fpoJwaQRtxENwHcdhkf+jg==, tableContent=null), ArticleFig(id=1241694382382969298, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503114687636326, language=EN, label=Tab.1, caption=
Top 9 Principal Component Information
, figureFileSmall=null, figureFileBig=null, tableContent=
| 主成分 | 特征值 | 贡献率/% | 累计贡献率/% |
|---|
| 1 | 9.543 | 43.376 | 43.4 |
| 2 | 3.211 | 14.593 | 58.0 |
| 3 | 2.288 | 10.402 | 68.4 |
| 4 | 1.466 | 6.662 | 75.0 |
| 5 | 1.033 | 4.697 | 79.7 |
| 6 | 0.876 | 3.980 | 83.7 |
| 7 | 0.803 | 3.649 | 87.4 |
| 8 | 0.530 | 2.411 | 89.8 |
| 9 | 0.413 | 1.877 | 91.6 |
), ArticleFig(id=1241694382462661079, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503114687636326, language=CN, label=表1, caption=
前9个主成分信息
, figureFileSmall=null, figureFileBig=null, tableContent=
| 主成分 | 特征值 | 贡献率/% | 累计贡献率/% |
|---|
| 1 | 9.543 | 43.376 | 43.4 |
| 2 | 3.211 | 14.593 | 58.0 |
| 3 | 2.288 | 10.402 | 68.4 |
| 4 | 1.466 | 6.662 | 75.0 |
| 5 | 1.033 | 4.697 | 79.7 |
| 6 | 0.876 | 3.980 | 83.7 |
| 7 | 0.803 | 3.649 | 87.4 |
| 8 | 0.530 | 2.411 | 89.8 |
| 9 | 0.413 | 1.877 | 91.6 |
), ArticleFig(id=1241694382554935775, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503114687636326, language=EN, label=Tab.2, caption=
Hyperparameter upper and lower limits
, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | LSTM层隐含单元数 | 初始学习率 | L2正则化系数 |
|---|
| 上限 | 150 | 3×10–3 | 1×10–2 |
| 下限 | 5 | 1×10–4 | 1×10–10 |
), ArticleFig(id=1241694382663987687, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503114687636326, language=CN, label=表2, caption=
超参数上下限
, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | LSTM层隐含单元数 | 初始学习率 | L2正则化系数 |
|---|
| 上限 | 150 | 3×10–3 | 1×10–2 |
| 下限 | 5 | 1×10–4 | 1×10–10 |
), ArticleFig(id=1241694382735290858, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503114687636326, language=EN, label=Tab.3, caption=
Hyperparameter optimization results
, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | 适应度函数值 | LSTM层隐含单元数 | 初始学习率 | L2正则化系数 |
|---|
| 再热蒸汽温度 | 0.015 8 | 98 | 2×10–3 | 1.35×10–4 |
| 低压主蒸汽温度 | 0.032 3 | 93 | 1.7×10–3 | 1×10–10 |
| 高压主蒸汽温度 | 0.009 3 | 84 | 1.7×10–4 | 1×10–10 |
| 再热蒸汽压力 | 0.022 7 | 27 | 9.33×10–4 | 1.2×10–3 |
| 低压主蒸汽压力 | 0.020 4 | 88 | 1.6×10–3 | 4.26×10–5 |
| 高压主蒸汽压力 | 0.008 4 | 105 | 1.9×10–4 | 2.7×10–10 |
), ArticleFig(id=1241694382840148469, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503114687636326, language=CN, label=表3, caption=
SSA对LSTM超参数寻优结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | 适应度函数值 | LSTM层隐含单元数 | 初始学习率 | L2正则化系数 |
|---|
| 再热蒸汽温度 | 0.015 8 | 98 | 2×10–3 | 1.35×10–4 |
| 低压主蒸汽温度 | 0.032 3 | 93 | 1.7×10–3 | 1×10–10 |
| 高压主蒸汽温度 | 0.009 3 | 84 | 1.7×10–4 | 1×10–10 |
| 再热蒸汽压力 | 0.022 7 | 27 | 9.33×10–4 | 1.2×10–3 |
| 低压主蒸汽压力 | 0.020 4 | 88 | 1.6×10–3 | 4.26×10–5 |
| 高压主蒸汽压力 | 0.008 4 | 105 | 1.9×10–4 | 2.7×10–10 |
), ArticleFig(id=1241694382957588988, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503114687636326, language=EN, label=Tab.4, caption=
HRSG steam output parameter prediction and evaluation index information
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| 对比模型 | PCA-BP | PCA-LSTM | PCA-SSA-LSTM |
|---|
| 再热蒸汽温度 | δRMSE | 2.177 | 1.786 | 0.516 |
| R2 | 0.170 | 0.441 | 0.953 |
| δMAE | 1.884 | 1.357 | 0.362 |
| 低压主蒸汽温度 | δRMSE | 2.633 | 1.686 | 0.938 |
| R2 | 0.107 | 0.335 | 0.617 |
| δMAE | 2.177 | 1.816 | 0.688 |
| 高压主蒸汽温度 | δRMSE | 1.515 | 0.820 | 0.434 |
| R2 | 0.506 | 0.855 | 0.959 |
| δMAE | 1.243 | 0.581 | 0.283 |
| 再热蒸汽压力 | δRMSE | 35.577 | 7.971 | 6.592 |
| R2 | 0.175 | 0.959 | 0.972 |
| δMAE | 30.035 | 6.122 | 4.743 |
| 低压主蒸汽压力 | δRMSE | 5.047 | 2.314 | 1.747 |
| R2 | 0.609 | 0.918 | 0.954 |
| δMAE | 3.929 | 1.778 | 1.338 |
| 高压主蒸汽压力 | δRMSE | 41.305 | 8.855 | 7.004 |
| R2 | 0.003 | 0.920 | 0.950 |
| δMAE | 33.126 | 5.417 | 5.019 |
), ArticleFig(id=1241694383058252293, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1222503114687636326, language=CN, label=表4, caption=
余热锅炉蒸汽输出参数预测评估指标信息
, figureFileSmall=null, figureFileBig=null, tableContent=
| 对比模型 | PCA-BP | PCA-LSTM | PCA-SSA-LSTM |
|---|
| 再热蒸汽温度 | δRMSE | 2.177 | 1.786 | 0.516 |
| R2 | 0.170 | 0.441 | 0.953 |
| δMAE | 1.884 | 1.357 | 0.362 |
| 低压主蒸汽温度 | δRMSE | 2.633 | 1.686 | 0.938 |
| R2 | 0.107 | 0.335 | 0.617 |
| δMAE | 2.177 | 1.816 | 0.688 |
| 高压主蒸汽温度 | δRMSE | 1.515 | 0.820 | 0.434 |
| R2 | 0.506 | 0.855 | 0.959 |
| δMAE | 1.243 | 0.581 | 0.283 |
| 再热蒸汽压力 | δRMSE | 35.577 | 7.971 | 6.592 |
| R2 | 0.175 | 0.959 | 0.972 |
| δMAE | 30.035 | 6.122 | 4.743 |
| 低压主蒸汽压力 | δRMSE | 5.047 | 2.314 | 1.747 |
| R2 | 0.609 | 0.918 | 0.954 |
| δMAE | 3.929 | 1.778 | 1.338 |
| 高压主蒸汽压力 | δRMSE | 41.305 | 8.855 | 7.004 |
| R2 | 0.003 | 0.920 | 0.950 |
| δMAE | 33.126 | 5.417 | 5.019 |
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