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1、第十八卷第三期安徽電氣工程職業(yè)技術(shù)學(xué)院學(xué)報(bào)2013年9月Vo1．18，No．3JOURNALOFANHUIELECTRICALENGINEERINGPROFESSIONALTECHNIQUECOLLEGESeptember2013超超臨界機(jī)組汽溫控制策略研究及應(yīng)用張興，丁曉漢，王小兵，施壯(1．安徽省電力科學(xué)研究院，安徽合肥230061；2．中電國(guó)際蕪湖發(fā)電有限責(zé)任公司，安徽蕪湖241009)摘要：由于超超臨界機(jī)組復(fù)雜的動(dòng)態(tài)特性、變參數(shù)的運(yùn)行方式、多變量的控制特點(diǎn)，采用傳統(tǒng)的設(shè)計(jì)方法難以對(duì)超超臨
2、界機(jī)組主汽溫進(jìn)行有效的控制，因此開展了超超臨界機(jī)組主汽溫控制策略研究。通過對(duì)當(dāng)前典型的超超臨界主汽溫控制策略進(jìn)行分析，針對(duì)中電蕪湖發(fā)電廠660MW超超臨界機(jī)組汽溫被控對(duì)象的特性，設(shè)計(jì)了新型的過熱汽溫控制系統(tǒng)。該系統(tǒng)分別采用控制給水中間點(diǎn)焓值的方法實(shí)現(xiàn)過熱汽溫的粗調(diào)，并采用基于物理機(jī)理的減溫水控制方案實(shí)現(xiàn)過熱汽溫的細(xì)調(diào)。在大負(fù)荷范圍和高負(fù)荷變化速率的工況下，通過對(duì)控制系統(tǒng)的整定和優(yōu)化，克服了過熱汽溫大延遲和大慣性的缺點(diǎn)，調(diào)節(jié)品質(zhì)優(yōu)良，提高了機(jī)組運(yùn)行的經(jīng)濟(jì)性。為今后同類型系統(tǒng)設(shè)計(jì)、調(diào)試提供了借鑒。關(guān)
3、鍵詞：超超臨界；汽溫控制；大慣性；中間點(diǎn)焓值；噴水減溫中圖分類號(hào)：TK323文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1672-9706(2013)03．0071—05嘲I郴張腳珊珊黜黜釬螂啦lResearchandApplicationontheSteamTemperatureControliStrategyoftheUltraSupercriticalUnitlZHANGXing，DINGXiao—han，WANGXiao—bing，SHIZhuang(1．AnhuiElectricPowerResearch
4、Institute，Hefei230061，China；2．WuhuPowerGenerationCo．，Ltd．，ChinaPowerInternational，Wuhu241009，China)Abstract：Owingtothecomplicateddynamiccharacteristics，variableoperationmodeandmulti—variablecontrolcharacteristicsofsupercriticalunits，thetraditionaldes
5、ignmethodofsupercriticalunitfailedtocontrolthemainsteamtemperatureeffectively．Therefore，themainsteamtemperaturecontrolstrategyoftheultrasupercriticalunitisstudiedinthispaper．Themainsteamtemperatureiscontrolledbyanalysisofthetypicalmainsteamtemperatur
6、econtrolstrategyoftheultra-supercriticalunit．Aimingatthecharac-teristicsofthecontrolledobjectinprojectofWuhuPowerPlant，the660MWultrasupercriticalpowerU—nit，anewtypeofsuperheatedsteamtemperaturecontrolsystemhasbeendesigned．Inthissystem，coarseregulatio
7、nofthetemperatureiscarriedoutbycontrollingtheintermediatepointenthalpyofthefeed-water，andthefineregulationofthetemperatureisimplementedbythephysicalmechanismcontro1．Underlargeloadrangeandhighloadchangingrate，throughtuningandoptimizingthecontrolsystem
8、，thelargetimelagandlargeinertiaoftheprocessareovercome，andexcellentregulationqualityisob-Itained．Itisworthtobeusedforreferenceindesigninganddebuggingofsimilarsystems．Keywords：ultra—supercritical；steamtemperaturecontrol；largeinertia；intermediatepointe
