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1、華中科技大學(xué)碩士學(xué)位論文PLC在集散監(jiān)控系統(tǒng)中的應(yīng)用姓名:劉剛申請學(xué)位級別:碩士專業(yè):控制理論與控制工程指導(dǎo)教師:王仲東20030101丫汀?753'0摘要集散控制系統(tǒng)是在計算機技術(shù),控制技術(shù),通信網(wǎng)絡(luò)技術(shù)等基礎(chǔ)上發(fā)展起來的,主要用于生產(chǎn)過程的集中管理和分散控制。本文討論集散控制系統(tǒng)概念和設(shè)計思想,重點分析了它的4個部分組成:現(xiàn)場l/o控制站、操作員站、工程師站和系統(tǒng)網(wǎng)絡(luò),為闡述PLC在集散監(jiān)控系統(tǒng)中的應(yīng)用打下很好的基礎(chǔ)。本文以江西省重點工程“上饒下會坑水電站微機監(jiān)控保護系統(tǒng)”的設(shè)計和實現(xiàn)為背景,從實際應(yīng)用的角度出發(fā),重點闡述Siemens公司的先進S7-200系列PLC=并把
2、它投入到工廠具體生產(chǎn)過程中,提高了工業(yè)自動化應(yīng)用水平。系統(tǒng)總體設(shè)計采用全分布式結(jié)構(gòu),選用先進現(xiàn)場智能儀表實現(xiàn)底層功能。特別是本系統(tǒng)綜合各產(chǎn)品的優(yōu)點,將各種設(shè)備有機地融為一體,從整體上達到了很高的自動化程度。PLC軟件編制是本系統(tǒng)的關(guān)鍵。各子系統(tǒng)在設(shè)計與實施中采用了先進的方法,并單獨編制了方便靈活、功能強大的監(jiān)控軟件,在文中被特別描述。系統(tǒng)有以下創(chuàng)新點:·完善的系統(tǒng)集成性能·監(jiān)控子系統(tǒng)具有同行業(yè)先進水平·對可編程控制器(PLC)的靈活應(yīng)用提高了系統(tǒng)自動化程度一年多來的實際運行證明:系統(tǒng)在實現(xiàn)測、控、管一體化技術(shù)上已具有相當?shù)乃?,值得推廣應(yīng)用。關(guān)鍵詞:集散控制系統(tǒng):電力自動化;P
3、LC;通信未is汁歲一訓(xùn)司意勿全交公布弋已AbstractDistributedControlSystem(DCS)isdevelopedunderthefundamentaryofcomputertechniques,controltechniques,computercommunicationandnetworktechniques,whicharemainlyusedfordistributedcontrolandintegratedmanagementofmanufactureprocess.Thisthesisdiscussestheconceptionandthed
4、evelopmentideaofDCS,thenitsfourmaincomponents:thelocalcontrolunit,theoperatorstation,theengineerstationandthesystemnetworkThethesisisbasedonthedesignofcomputercontrolandprotectionsystemoftheXiahuikenghydropowerstation,inthecityofShangrao,whichisthekeyprojectinJiangxiProvince.Fromtheangleofpr
5、actice,itfocusesonPLCofS7seriesofSiemensbasedonthegeneraltheoryofDCS,includingitsapplication.Thewholesystemdesignadoptsfull-distributedstructureandadvancedintelligencedevicestofulfilllowlayerfunction.Whatismore,thissystemcombinesthecreditsofdiferentproducts,makesallkindsofdevicesasawholeando
6、btainsrelativelyhighautomation.Programdevelopingisthekeypartinthissystem.Intheprocessofdesignandimplementation,advancedmethodisusedinrectifiercontrolsubsystem.Convenient,flexibleandstrongfunctionalmonitoringsoftwareisdeveloped,whichisdescribedespeciallyinthisthesisSeveralinnovationsareobtain
7、edinthissystem:·Perfectsystemintegration.Monitorcontrolsubsystemisadvancedinrelativetrade.TheflexibleuseofPLCimprovestheautomationstandardinthissysteminthemorethanoneyearofrunning,itisverifiedthatthissystemreachestheratherhighlevelinall-in-onetechn