Article(id=1211002413562065540, tenantId=1146029695717560320, journalId=1210938733613449225, issueId=1210998030828958715, articleNumber=null, orderNo=null, doi=10.19666/j.rlfd.202305088, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1684080000000, receivedDateStr=2023-05-15, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1766655074730, onlineDateStr=2025-12-25, pubDate=1706112000000, pubDateStr=2024-01-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1766655074730, onlineIssueDateStr=2025-12-25, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1766655074730, creator=13701087609, updateTime=1766655074730, updator=13701087609, issue=Issue{id=1210998030828958715, tenantId=1146029695717560320, journalId=1210938733613449225, year='2024', volume='53', issue='1', pageStart='1', pageEnd='196', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1766654029805, creator=13701087609, updateTime=1766734793553, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1211336778607366994, tenantId=1146029695717560320, journalId=1210938733613449225, issueId=1210998030828958715, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1211336778611561299, tenantId=1146029695717560320, journalId=1210938733613449225, issueId=1210998030828958715, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=107, endPage=114, ext={EN=ArticleExt(id=1211002416414192372, articleId=1211002413562065540, tenantId=1146029695717560320, journalId=1210938733613449225, language=EN, title=Intermediate point superheat predictive control based on double-depth input convex neural network with multi-model, columnId=1211002405299294959, journalTitle=Thermal Power Generation, columnName=Thermal energy science research, runingTitle=null, highlight=null, articleAbstract=
As a large number of new energy is connected to the grid, the participation of supercritical thermal power units in peak regulation tends to cause the superheat of intermediate points to fluctuate greatly, resulting in superheated steam over temperature and other problems. In order to better control the intermediate point superheat to achieve stability, a prediction method of intermediate point superheat based on double-depth input convex neural network multi-model (muti-DDICNN model) was proposed. Sub-models with different prediction step sizes were trained respectively, and the intermediate point superheat state prediction network (SPNN) and error prediction network (EPNN) were constructed. Based on the convex property of prediction network, a multi-model predictive controller (DDICNN-MPC) based on convex neural network with double-depth input is designed. The control problem is transformed into a convex optimization problem, the Jacobian matrix of control matrix to objective function is obtained, and the optimal solution of control matrix is calculated by gradient descent method. The simulation results show that, the DDICNN-MPC can track the intermediate point superheat setting quickly and stably, and the steady-state error is small, so it has good adjustment ability.
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新能源大量并网,超临界火电机组参与调峰容易造成中间点过热度较大波动,从而导致过热蒸汽超温等问题。为较好控制中间点过热度达到稳定,提出了一种基于双深度输入凸神经网络多模型(muti-DDICNN model)的中间点过热度预测方法,分别训练了不同预测步长下子模型,构建了中间点过热度状态预测网络(SPNN)和误差预测网络(EPNN)。利用此预测网络凸性质,设计了一种基于双深度输入凸神经网络多模型预测控制器(DDICNN-MPC),将控制问题转化为凸优化问题,求取控制矩阵对目标函数的雅可比矩阵,采用梯度下降法计算控制矩阵最优解。仿真结果表明,DDICNN-MPC能快速平稳地跟踪中间点过热度设定值,且稳态误差较小,具有较好的调节能力。
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1.School of Energy and Power Engineering, Changsha University of Science and Technology, Changsha 410114, China), AuthorCompanyExt(id=1211018021645185882, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002413562065540, companyId=1211018021628408665, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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2.Shaanxi Gaoye Energy Technology Co., Ltd., Xi’an 710061, China), AuthorCompanyExt(id=1211018021758432098, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002413562065540, companyId=1211018021733266272, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2.陕西高业能源科技有限公司,陕西 西安 710061)]), AuthorCompany(id=1211018021829735272, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002413562065540, xref=3., ext=[AuthorCompanyExt(id=1211018021838123881, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002413562065540, companyId=1211018021829735272, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
3.HNAC Technology Co., Ltd., Changsha 410006, China), AuthorCompanyExt(id=1211018021842318186, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002413562065540, companyId=1211018021829735272, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
3.华自科技股份有限公司,湖南 长沙 410006)])], figs=[ArticleFig(id=1211018025076126712, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002413562065540, language=EN, label=Fig.1, caption=
Architecture of an input convex neural network, figureFileSmall=4fLzoCkluMCATMc5KqF0BQ==, figureFileBig=CAI+IsY1L6T9jkA1QrEQ/A==, tableContent=null), ArticleFig(id=1211018025147429887, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002413562065540, language=CN, label=图1, caption=
输入凸神经网络结构, figureFileSmall=4fLzoCkluMCATMc5KqF0BQ==, figureFileBig=CAI+IsY1L6T9jkA1QrEQ/A==, tableContent=null), ArticleFig(id=1211018025248092166, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002413562065540, language=EN, label=Fig.2, caption=
Architecture of the 660 MW boiler-turbine unit, figureFileSmall=Hwbu1DUf8Hjd+AAcC/PTIA==, figureFileBig=Xlm1YZKedQJdUhUSgTLMiA==, tableContent=null), ArticleFig(id=1211018025365532682, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002413562065540, language=CN, label=图2, caption=
超临界660 MW机组直流锅炉结构, figureFileSmall=Hwbu1DUf8Hjd+AAcC/PTIA==, figureFileBig=Xlm1YZKedQJdUhUSgTLMiA==, tableContent=null), ArticleFig(id=1211018025474584591, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002413562065540, language=EN, label=Fig.3, caption=
The muti-DDICNN model, figureFileSmall=UX9bw03ju6QrW0Eq7hR+5w==, figureFileBig=irdf9fZ2EImoihHATbdr5A==, tableContent=null), ArticleFig(id=1211018025587830809, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002413562065540, language=CN, label=图3, caption=
双深度输入凸神经网络多模型预测模型, figureFileSmall=UX9bw03ju6QrW0Eq7hR+5w==, figureFileBig=irdf9fZ2EImoihHATbdr5A==, tableContent=null), ArticleFig(id=1211018025717854240, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002413562065540, language=EN, label=Fig.4, caption=
Comparison between output values of the ICNN sub-model verification set and the actual values (p=1, 2, …, 10), figureFileSmall=Bb/xRrJhHwCKVRG+E7xokA==, figureFileBig=j2PV9oo6j8SrRIGW0X+j5A==, tableContent=null), ArticleFig(id=1211018025852071973, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002413562065540, language=CN, label=图4, caption=
ICNN子模型验证集输出与实际值对比(p=1, 2, …, 10), figureFileSmall=Bb/xRrJhHwCKVRG+E7xokA==, figureFileBig=j2PV9oo6j8SrRIGW0X+j5A==, tableContent=null), ArticleFig(id=1211018026007261226, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002413562065540, language=EN, label=Fig.5, caption=
The DDICNN-MPC controller, figureFileSmall=OM1ao2ZLz9++x2aoC/+FdQ==, figureFileBig=Zpi/DAIbPoWQ/1tT705C5Q==, tableContent=null), ArticleFig(id=1211018026128896046, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002413562065540, language=CN, label=图5, caption=
DDICNN-MPC控制器, figureFileSmall=OM1ao2ZLz9++x2aoC/+FdQ==, figureFileBig=Zpi/DAIbPoWQ/1tT705C5Q==, tableContent=null), ArticleFig(id=1211018026246336564, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002413562065540, language=EN, label=Fig.6, caption=
Change curves of intermediate point overheat (controlled amount), figureFileSmall=s2yEqfZwG4hAdvgWZcDk0Q==, figureFileBig=Q5k9iNdLOFybVbOcomVhxw==, tableContent=null), ArticleFig(id=1211018026309251128, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002413562065540, language=CN, label=图6, caption=
中间点过热度(被控量)变化曲线, figureFileSmall=s2yEqfZwG4hAdvgWZcDk0Q==, figureFileBig=Q5k9iNdLOFybVbOcomVhxw==, tableContent=null), ArticleFig(id=1211018026405720126, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002413562065540, language=EN, label=Fig.7, caption=
Change curves of coal feed, water feed and turbine switch opening (control amount), figureFileSmall=IKck8sbfFTHJsVGloqXblA==, figureFileBig=7LS75Iyi6E4lla/fe2NV7g==, tableContent=null), ArticleFig(id=1211018026527354948, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002413562065540, language=CN, label=图7, caption=
给煤量、给水量、调节阀开度(控制量)变化曲线, figureFileSmall=IKck8sbfFTHJsVGloqXblA==, figureFileBig=7LS75Iyi6E4lla/fe2NV7g==, tableContent=null), ArticleFig(id=1211018026644795468, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002413562065540, language=EN, label=Fig.8, caption=
Change curves primary air volume, primary air temperature (control amount), figureFileSmall=YmvDTA158NFj2GmJHfMZ5g==, figureFileBig=WpCnvcHqdBgSBFH8U9j7BQ==, tableContent=null), ArticleFig(id=1211018026766430287, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002413562065540, language=CN, label=图8, caption=
一次风量、一次风温(控制量)变化曲线, figureFileSmall=YmvDTA158NFj2GmJHfMZ5g==, figureFileBig=WpCnvcHqdBgSBFH8U9j7BQ==, tableContent=null), ArticleFig(id=1211018026862899285, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002413562065540, language=EN, label=Tab.1, caption=
The losses of different sub-model training sets and validation sets
, figureFileSmall=null, figureFileBig=null, tableContent=
| p | 输入参数 | 训练集损失 | 验证集损失 |
|---|
| MLR | BPNN | ICNN | MLR | BPNN | ICNN |
|---|
| 1 | 17 | 1.10×10–2 | 4.41×10–2 | 9.30×10–2 | 1.03×10–2 | 7.91×10–2 | 7.91×10–2 |
| 2 | 22 | 3.75×10–2 | 2.74×10–2 | 1.56×10–2 | 3.74×10–2 | 2.17×10–2 | 1.11×10–2 |
| 3 | 27 | 5.57×10–2 | 3.27×10–2 | 1.10×10–1 | 1.10×10–1 | 4.54×10–2 | 3.22×10–2 |
| 4 | 32 | 1.05×10–1 | 5.29×10–2 | 5.82×10–2 | 1.09×10–1 | 4.26×10–2 | 5.31×10–2 |
| 5 | 37 | 1.56×10–1 | 1.16×10–1 | 1.38×10–1 | 1.82×10–1 | 1.03×10–1 | 9.33×10–2 |
| 6 | 42 | 3.45×10–1 | 1.24×10–1 | 1.09×10–1 | 2.41×10–1 | 9.68×10–2 | 2.00×10–1 |
| 7 | 47 | 2.46×10–1 | 1.93×10–1 | 2.36×10–1 | 3.35×10–1 | 2.02×10–1 | 1.78×10–1 |
| 8 | 52 | 2.65×10–1 | 3.22×10–1 | 2.25×10–1 | 4.59×10–1 | 2.81×10–1 | 2.01×10–1 |
| 9 | 57 | 5.90×10–1 | 3.59×10–1 | 3.43×10–1 | 5.33×10–1 | 3.35×10–1 | 2.92×10–1 |
| 10 | 62 | 5.93×10–1 | 3.14×10–1 | 3.24×10–1 | 5.91×10–1 | 3.85×10–1 | 3.45×10–1 |
), ArticleFig(id=1211018026950979674, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002413562065540, language=CN, label=表1, caption=
不同子模型训练集和验证集损失
, figureFileSmall=null, figureFileBig=null, tableContent=
| p | 输入参数 | 训练集损失 | 验证集损失 |
|---|
| MLR | BPNN | ICNN | MLR | BPNN | ICNN |
|---|
| 1 | 17 | 1.10×10–2 | 4.41×10–2 | 9.30×10–2 | 1.03×10–2 | 7.91×10–2 | 7.91×10–2 |
| 2 | 22 | 3.75×10–2 | 2.74×10–2 | 1.56×10–2 | 3.74×10–2 | 2.17×10–2 | 1.11×10–2 |
| 3 | 27 | 5.57×10–2 | 3.27×10–2 | 1.10×10–1 | 1.10×10–1 | 4.54×10–2 | 3.22×10–2 |
| 4 | 32 | 1.05×10–1 | 5.29×10–2 | 5.82×10–2 | 1.09×10–1 | 4.26×10–2 | 5.31×10–2 |
| 5 | 37 | 1.56×10–1 | 1.16×10–1 | 1.38×10–1 | 1.82×10–1 | 1.03×10–1 | 9.33×10–2 |
| 6 | 42 | 3.45×10–1 | 1.24×10–1 | 1.09×10–1 | 2.41×10–1 | 9.68×10–2 | 2.00×10–1 |
| 7 | 47 | 2.46×10–1 | 1.93×10–1 | 2.36×10–1 | 3.35×10–1 | 2.02×10–1 | 1.78×10–1 |
| 8 | 52 | 2.65×10–1 | 3.22×10–1 | 2.25×10–1 | 4.59×10–1 | 2.81×10–1 | 2.01×10–1 |
| 9 | 57 | 5.90×10–1 | 3.59×10–1 | 3.43×10–1 | 5.33×10–1 | 3.35×10–1 | 2.92×10–1 |
| 10 | 62 | 5.93×10–1 | 3.14×10–1 | 3.24×10–1 | 5.91×10–1 | 3.85×10–1 | 3.45×10–1 |
), ArticleFig(id=1211018027068420193, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002413562065540, language=EN, label=Tab.2, caption=
Controller performance indexes
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| 控制器 | 平均调节 时间/s | 稳态 误差/% | 平均绝对 误差/℃ |
|---|
| DDBPNN-MPC | 1 215 | 0.37 | 3.37 |
| DDICNN-MPC | 518 | 0.35 | 1.54 |
), ArticleFig(id=1211018027294912615, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1211002413562065540, language=CN, label=表2, caption=
控制器性能指标
, figureFileSmall=null, figureFileBig=null, tableContent=
| 控制器 | 平均调节 时间/s | 稳态 误差/% | 平均绝对 误差/℃ |
|---|
| DDBPNN-MPC | 1 215 | 0.37 | 3.37 |
| DDICNN-MPC | 518 | 0.35 | 1.54 |
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