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1、華北電力大學(xué)本科生畢業(yè)設(shè)計(jì)(論文)畢業(yè)設(shè)計(jì)(論文)題目:超超臨界機(jī)組主汽溫控制系統(tǒng)分析院系自動(dòng)化系專業(yè)班級(jí)自動(dòng)化0903班學(xué)生姓名白晶棟指導(dǎo)教師王曉燕二〇一三年六月華北電力大學(xué)本科生畢業(yè)設(shè)計(jì)(論文)超超臨界機(jī)組主汽溫控制系統(tǒng)分析摘要21世紀(jì)以來,我國電力工業(yè)正邁向以高效、節(jié)能、環(huán)保的能源利用和環(huán)境并重的可持續(xù)發(fā)展為戰(zhàn)略目標(biāo)的發(fā)展階段,其重要的標(biāo)志是超超臨界機(jī)組正在飛速發(fā)展。超超臨界發(fā)電技術(shù)的發(fā)展可以創(chuàng)造新的經(jīng)濟(jì)增長(zhǎng)點(diǎn),是我國電力工業(yè)可持續(xù)發(fā)展的戰(zhàn)略選擇。而主汽溫控制又直接關(guān)系到機(jī)組的安全經(jīng)濟(jì)運(yùn)行,因此本課題開展了超超臨界機(jī)組主汽溫控制系統(tǒng)的特性及其控制策略研究。火力發(fā)電廠
2、汽溫控制是一個(gè)研究了多年的問題,隨著系統(tǒng)的普及運(yùn)用,串級(jí)控制策略已經(jīng)成為經(jīng)典而被廣泛采用。本文分析了超超臨界機(jī)組汽溫對(duì)象的特點(diǎn)以及控制上的難點(diǎn),以某實(shí)際超超臨界機(jī)組為例,對(duì)其主汽溫控制系統(tǒng)進(jìn)行分析。最后通過對(duì)一、二級(jí)過熱汽溫系統(tǒng)sama圖的分析,進(jìn)一步加深了對(duì)主汽溫控制系統(tǒng)的了解。關(guān)鍵字:超超臨界機(jī)組;主汽溫控制;動(dòng)靜態(tài)特性;一、二級(jí)過熱器減溫水1華北電力大學(xué)本科生畢業(yè)設(shè)計(jì)(論文)ANALYSISOFULTRA-SUPERCRITICALMAINSTEAMTEMPERATURECONTROLSYSTEMAbstractSincethe21century,china’sel
3、ectricpowerindustryismovingtowardsanefficient,energy-saving,environmentrolprotection,energyutilizationandtheenvironmentbothsustainabledevelopmentforthestrategictargetofdevelopmentstage,itsimportantmarkofultrasuperiticalunitisgrowing.Theultrasupercriticalpowergenerationtechnology’scancreat
4、eneweconomicpoints,itisthestrategicchoiceofsustainabledevelopmentofchina’spowerindustry,itistheinnovationofeconomic.Andthemainsteamtemperaturecontrolisdirectlyrelatedtothesafeandeconomicoperationofgeneratingunits.Therefore,featuresofthemainsteamtemperaturecontrolsystemandthemaintemperatur
5、econtrolstrategyoftheultrasupercriticalunitsisstudiedinthispaper.Thesteamtemperaturecontrolstrategyhasbeenstudiedforyears.AlongwiththewidelyapplicationofDCSsystem,thecascadePIDcontrolmodelhasbeenwidelyadoptedasaclassicalstrategy.Thispaperanalyzestheultra-supercriticalunitsteamtemperaturec
6、haracteristicsoftheobjectaswellasthedifficultyofcontrol,ultra-supercriticalunitsinapracticalexample,itsmainsteamtemperaturecontrolsystemforanalysis.Finally,throughoneandtwosuperheatedsteamtemperaturesystemsamachartanalysis,andfurtherdeepenedthemainsteamtemperaturecontrolsystemunderstandin
7、g.Keywords:Ultra-supercriticalunits;Mainsteamtemperaturecontrol;Dynamicandstaticcharacteristics;OneandtwoheatedsuperheaterlessIV華北電力大學(xué)本科生畢業(yè)設(shè)計(jì)(論文)目錄摘要IAbstractII1緒論11.1研究背景及意義11.2超超臨界機(jī)組國內(nèi)發(fā)展現(xiàn)狀11.3超超臨界機(jī)組主汽溫控制研究現(xiàn)狀11.4本文主要研究的內(nèi)容32超超臨界機(jī)組主汽溫控制系統(tǒng)的特性42.1超超臨界直流爐概述42.1.1直流爐工作原理