Improvement of thermal efficiency for combined cycle power plant during load following operation
An optimization method for unit startup and shutdown timing in the load control system is proposed for combined cycle power plants to improve thermal efficiency during load following operation. The optimum timings are derived from regression equations obtained through offline dynamics simulation ana...
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| Veröffentlicht in: | IEEE transactions on electron devices 1999-09, Vol.14 (3), p.787-794 |
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| container_end_page | 794 |
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| container_issue | 3 |
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| container_title | IEEE transactions on electron devices |
| container_volume | 14 |
| creator | Matsumoto, H. Takahasi, S. |
| description | An optimization method for unit startup and shutdown timing in the load control system is proposed for combined cycle power plants to improve thermal efficiency during load following operation. The optimum timings are derived from regression equations obtained through offline dynamics simulation analysis. The system is applied to a simulation for a plant of a three-pressure staged reheat type (1650 MW rated capacity) which consists of seven units, and the following points are seen: (1) the larger the load change amount is, the earlier the recommended additional startup timing is; (2) the tendency described in (1) is more remarkable when the load change is faster; and (3) thermal efficiency is expected to be increased by 9% compared with the conventional method. |
| doi_str_mv | 10.1109/60.790952 |
| format | Article |
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The optimum timings are derived from regression equations obtained through offline dynamics simulation analysis. The system is applied to a simulation for a plant of a three-pressure staged reheat type (1650 MW rated capacity) which consists of seven units, and the following points are seen: (1) the larger the load change amount is, the earlier the recommended additional startup timing is; (2) the tendency described in (1) is more remarkable when the load change is faster; and (3) thermal efficiency is expected to be increased by 9% compared with the conventional method.</description><identifier>ISSN: 0885-8969</identifier><identifier>ISSN: 0018-9383</identifier><identifier>EISSN: 1558-0059</identifier><identifier>EISSN: 1557-9646</identifier><identifier>DOI: 10.1109/60.790952</identifier><identifier>CODEN: ITCNE4</identifier><language>eng</language><publisher>United States: IEEE</publisher><subject>20 FOSSIL-FUELED POWER PLANTS ; Analytical models ; Combined cycle engines ; COMBINED-CYCLE POWER PLANTS ; Dynamics ; Electric power generation ; Electric power plants ; ENERGY PLANNING AND POLICY ; Equations ; Knowledge engineering ; LOAD ANALYSIS ; Load flow control ; Mathematical analysis ; OPERATION ; Optimization methods ; Power generation ; Power generation economics ; POWER SYSTEMS ; Simulation ; START-UP ; THERMAL EFFICIENCY ; Thermal loading ; Time measurements ; Timing ; Turbines</subject><ispartof>IEEE transactions on electron devices, 1999-09, Vol.14 (3), p.787-794</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c370t-4aff7b51b1927fcf98c25e5b133c2ef2925a1187d7cc70fd89292c56593f01e23</citedby><cites>FETCH-LOGICAL-c370t-4aff7b51b1927fcf98c25e5b133c2ef2925a1187d7cc70fd89292c56593f01e23</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://ieeexplore.ieee.org/document/790952$$EHTML$$P50$$Gieee$$H</linktohtml><link.rule.ids>230,314,776,780,792,881,27903,27904,54736</link.rule.ids><linktorsrc>$$Uhttps://ieeexplore.ieee.org/document/790952$$EView_record_in_IEEE$$FView_record_in_$$GIEEE</linktorsrc><backlink>$$Uhttps://www.osti.gov/biblio/20001191$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Matsumoto, H.</creatorcontrib><creatorcontrib>Takahasi, S.</creatorcontrib><creatorcontrib>Hitachi Research Lab., Hitachinaka, Ibaraki (JP)</creatorcontrib><title>Improvement of thermal efficiency for combined cycle power plant during load following operation</title><title>IEEE transactions on electron devices</title><addtitle>TEC</addtitle><description>An optimization method for unit startup and shutdown timing in the load control system is proposed for combined cycle power plants to improve thermal efficiency during load following operation. The optimum timings are derived from regression equations obtained through offline dynamics simulation analysis. The system is applied to a simulation for a plant of a three-pressure staged reheat type (1650 MW rated capacity) which consists of seven units, and the following points are seen: (1) the larger the load change amount is, the earlier the recommended additional startup timing is; (2) the tendency described in (1) is more remarkable when the load change is faster; and (3) thermal efficiency is expected to be increased by 9% compared with the conventional method.</description><subject>20 FOSSIL-FUELED POWER PLANTS</subject><subject>Analytical models</subject><subject>Combined cycle engines</subject><subject>COMBINED-CYCLE POWER PLANTS</subject><subject>Dynamics</subject><subject>Electric power generation</subject><subject>Electric power plants</subject><subject>ENERGY PLANNING AND POLICY</subject><subject>Equations</subject><subject>Knowledge engineering</subject><subject>LOAD ANALYSIS</subject><subject>Load flow control</subject><subject>Mathematical analysis</subject><subject>OPERATION</subject><subject>Optimization methods</subject><subject>Power generation</subject><subject>Power generation economics</subject><subject>POWER SYSTEMS</subject><subject>Simulation</subject><subject>START-UP</subject><subject>THERMAL EFFICIENCY</subject><subject>Thermal loading</subject><subject>Time measurements</subject><subject>Timing</subject><subject>Turbines</subject><issn>0885-8969</issn><issn>0018-9383</issn><issn>1558-0059</issn><issn>1557-9646</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1999</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNp90UFLHTEQB_AgLfTV9tBrTwGhtYe1k-RlkxyLqBWEXtpz3Dc70ZTdzZrsq7xvb2SlR09hMr8Z-DOMfRJwJgS47y2cGQdOyyO2EVrbBkC7N2wD1urGuta9Y-9L-QsgtlqKDbu9Huec_tFI08JT4Ms95bEbOIUQMdKEBx5S5pjGXZyo53jAgficHinzeejqUL_PcbrjQ-r6SochPT6XaabcLTFNH9jb0A2FPr68x-zP5cXv85_Nza-r6_MfNw0qA0uz7UIwOy12wkkTMDiLUpPeCaVQUpBO6k4Ia3qDaCD01tUv1K12KoAgqY7Zybo3lSX6gnEhvMc0TYSLl1ADCyeq-rqqGvphT2XxYyxIQ01CaV-8A6naLThV5ZdXpbTKVGkrPH0VitYI5TTIbaXfVoo5lZIp-DnHscsHL8A_n8-34NfzVft5tZGI_ruX5hOU95SJ</recordid><startdate>19990901</startdate><enddate>19990901</enddate><creator>Matsumoto, H.</creator><creator>Takahasi, S.</creator><general>IEEE</general><scope>RIA</scope><scope>RIE</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>7TB</scope><scope>8FD</scope><scope>F28</scope><scope>FR3</scope><scope>H8D</scope><scope>KR7</scope><scope>L7M</scope><scope>7ST</scope><scope>7U6</scope><scope>C1K</scope><scope>OTOTI</scope></search><sort><creationdate>19990901</creationdate><title>Improvement of thermal efficiency for combined cycle power plant during load following operation</title><author>Matsumoto, H. ; Takahasi, S.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c370t-4aff7b51b1927fcf98c25e5b133c2ef2925a1187d7cc70fd89292c56593f01e23</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1999</creationdate><topic>20 FOSSIL-FUELED POWER PLANTS</topic><topic>Analytical models</topic><topic>Combined cycle engines</topic><topic>COMBINED-CYCLE POWER PLANTS</topic><topic>Dynamics</topic><topic>Electric power generation</topic><topic>Electric power plants</topic><topic>ENERGY PLANNING AND POLICY</topic><topic>Equations</topic><topic>Knowledge engineering</topic><topic>LOAD ANALYSIS</topic><topic>Load flow control</topic><topic>Mathematical analysis</topic><topic>OPERATION</topic><topic>Optimization methods</topic><topic>Power generation</topic><topic>Power generation economics</topic><topic>POWER SYSTEMS</topic><topic>Simulation</topic><topic>START-UP</topic><topic>THERMAL EFFICIENCY</topic><topic>Thermal loading</topic><topic>Time measurements</topic><topic>Timing</topic><topic>Turbines</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Matsumoto, H.</creatorcontrib><creatorcontrib>Takahasi, S.</creatorcontrib><creatorcontrib>Hitachi Research Lab., Hitachinaka, Ibaraki (JP)</creatorcontrib><collection>IEEE All-Society Periodicals Package (ASPP) 1998-Present</collection><collection>IEEE Electronic Library (IEL)</collection><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>ANTE: Abstracts in New Technology & Engineering</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Civil Engineering Abstracts</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Environment Abstracts</collection><collection>Sustainability Science Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>OSTI.GOV</collection><jtitle>IEEE transactions on electron devices</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Matsumoto, H.</au><au>Takahasi, S.</au><aucorp>Hitachi Research Lab., Hitachinaka, Ibaraki (JP)</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Improvement of thermal efficiency for combined cycle power plant during load following operation</atitle><jtitle>IEEE transactions on electron devices</jtitle><stitle>TEC</stitle><date>1999-09-01</date><risdate>1999</risdate><volume>14</volume><issue>3</issue><spage>787</spage><epage>794</epage><pages>787-794</pages><issn>0885-8969</issn><issn>0018-9383</issn><eissn>1558-0059</eissn><eissn>1557-9646</eissn><coden>ITCNE4</coden><abstract>An optimization method for unit startup and shutdown timing in the load control system is proposed for combined cycle power plants to improve thermal efficiency during load following operation. The optimum timings are derived from regression equations obtained through offline dynamics simulation analysis. The system is applied to a simulation for a plant of a three-pressure staged reheat type (1650 MW rated capacity) which consists of seven units, and the following points are seen: (1) the larger the load change amount is, the earlier the recommended additional startup timing is; (2) the tendency described in (1) is more remarkable when the load change is faster; and (3) thermal efficiency is expected to be increased by 9% compared with the conventional method.</abstract><cop>United States</cop><pub>IEEE</pub><doi>10.1109/60.790952</doi><tpages>8</tpages></addata></record> |
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| ispartof | IEEE transactions on electron devices, 1999-09, Vol.14 (3), p.787-794 |
| issn | 0885-8969 0018-9383 1558-0059 1557-9646 |
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| source | IEEE Electronic Library (IEL) |
| subjects | 20 FOSSIL-FUELED POWER PLANTS Analytical models Combined cycle engines COMBINED-CYCLE POWER PLANTS Dynamics Electric power generation Electric power plants ENERGY PLANNING AND POLICY Equations Knowledge engineering LOAD ANALYSIS Load flow control Mathematical analysis OPERATION Optimization methods Power generation Power generation economics POWER SYSTEMS Simulation START-UP THERMAL EFFICIENCY Thermal loading Time measurements Timing Turbines |
| title | Improvement of thermal efficiency for combined cycle power plant during load following operation |
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