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1、華北電力大學(xué)碩十學(xué)位論文摘要隨著鍋爐朝著大容量、高參數(shù)的方向發(fā)展,超超臨界機(jī)組的特點(diǎn)日益顯現(xiàn):大大降低了煤耗,節(jié)約了能源,減少了排污量,提高了經(jīng)濟(jì)效益。超超臨界機(jī)組將是我國(guó)今后火電發(fā)展的主力機(jī)型,而燃水比控制是超超臨界直流鍋爐控制的關(guān)鍵和難點(diǎn),而且控制效果制約著超超臨界機(jī)組的整體控制水平。本文針對(duì)超超臨界直流鍋爐運(yùn)行特性,提出了一種多變量解耦內(nèi)模控制方法。該方法結(jié)合了多變量?jī)?nèi)??刂扑惴ê徒怦钏惴ǎ瑧?yīng)用于超超臨界鍋爐燃水比系統(tǒng)中。仿真結(jié)果表明:該設(shè)計(jì)方案具有良好的解耦效果,控制系統(tǒng)的調(diào)節(jié)品質(zhì)令人滿意,并具有良好的魯棒性和抗
2、干擾能力。關(guān)鍵詞:超超臨界機(jī)組,燃水比,解耦,多變量IMCABSTRACTAstheboilertowardsvolumeandhi.ghultradeveloplargeparameter,thesupereriticalunitsbecomemoreandmorepopular,whichreducethecoalconsumption,economizetheultraenergysource,lessenthedischargecapacity,andenhancetheeconomybenefit.Thesup
3、ercriticalunitswillbethemaintypeoffossilpowerunitinchina,andcontrolofratiooffueltowateristhekeyandthedifficultyincontrollingtheultrasupereritiealunits,butalsorestrictsthewholecontrolleveloftheultrasupercritiealunits.Accordingtothefeaturesofultraarticlearunningsup
4、ercriticalonce-throughboiler,theproposesmultivariabledecouplingandinternalmodelcontrolmethod.Themethodisbasedonacombinationofmultivariableinternalmodelcontrolalgorithmanddeeouplingalgorithm,alsousedfortheratiooffueltowateroftheultrasupercriticalonce-throughboiler
5、.ThesimulationresultsshowsthatthedesignprogramCalldecouplecontrolverywell,thequalityofcontrolsystemisgoodandtherobustnessandanti—interferencequalityarealsogood.GaoYu-feng(ControlTheoryandControlEngineering)Directedbyprof.LiuJi--zhenandprof.NiuYu·-guangKEYWORDS:ul
6、trasupercriticalunit,ratiooffueltowater,decoupling,muItivariableinternaImodelcontroI華北電力大學(xué)碩士學(xué)位論文目錄摘要??????????????????????????????IABSTRACT??????????????????????????????I第一章緒論????????????????????????????????11.1課題研究的背景和意義????????????????????????11.2相關(guān)研究現(xiàn)狀和發(fā)展?????
7、????????????????????31-2.1燃水比控制策略研究??????????????????????..31.2.2燃水比調(diào)節(jié)信號(hào)研究??????????????????????..41-3本文的主要研究工作?????????????????????????4第二章超超臨界機(jī)組控制特性分析?????????????????????..62.1超超臨界直流鍋爐特性????????????????????????62.1.1直流爐工作原理????????????????????????。62.1.2直流爐靜態(tài)特
8、性????????????????????????.62.1.3直流爐動(dòng)態(tài)特性?????????????????????????72.2超超臨界直流鍋爐的控制特點(diǎn)?????????????????????92.2.1直流鍋爐控制中的問(wèn)題??????????????????????92.2.2超超臨界機(jī)組控制特點(diǎn)???