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Vol.30,No.6,2011PID。。1DODODO。2、、pH。。3。[1]DO。120m3／dA／A／O《》GB18918—2002A。1。DO。A、BAB。22.1PIDDO2。DO。3。DOPID[2]。DODOA／A／O111221.4000652.100022A／A／ODOA／A／ODODODO。DO±0.2mg／L。DOTU991.2A1009-0177201106-0070-04OptimizedDesignofAutomaticControlforDissolvedOxygeninA／A／OProcessesofUrbanSewageTreatmentYanBinbin1,LüXiafu1,ChenYong1,ChangJiang2,YangAnming2(1.SchoolofAutomation,ChongqingUniversityofPostsandTelecommunications,Chongqing400065,China2.BeijingDrainageGroup,Beijing100022,China)AbstractInordertosolvetheproblemoflargefluctuationofDOinaerationtankwhenlargewaterloadfluctuationinA／A／Oprocess,awastewatertreatmentplantof200000m3／dwasusedtoinvestigatetheoptimizationofautomaticcontrolofA／A／Oprocess.Addingalgorithmofaerationtankmodelonthebasisofthetraditionalsystem.TestrunshowsthattheoptimalcontrolsystemcanmaketheDOcontrolaccuracyrangeof±0.2mg／L.Keywordssewagetreatmentdissolvedoxygen(DO)automaticcontroloptimizeddesignmodelalgorithmofaera－tiontank!!!!!!!!!![]2011-07-06[]D101109047410001[]1986-。13996205317E-mailybb1986928@163.com。201130670-73WaterPurificationTechnology70--DOI:10.15890/j.cnki.jsjs.2011.06.010WATERPURIFICATIONTECHNOLOGYVol.30,No.6,2011December25th,2011左左。2.22.2.1DO1[1]。dSOdt=qFVSOF-qF+qRVSO+YH-1YHμHSSKS+SSSOKOH+SOXH+KLaSOSat-SO1KLaKLa=aqA+b,KLa=aqA姨,KLa=a1-eDOKLa=aqA+b。2.2.2[3]X(t)=f(X(t)u(t)t)X=x1x2…,xnTn。DODO。U=u1u2…un∧TpqA。f(X(t)u(t)t)n。X(t)∧dot=f(S(t)u(t)t)=f1(X(t)u(t)t)f2(X(t)u(t)t)左fn(X(t)u(t)ttttttttttttttttttttttttttttt)=f1(x1(t)x2(t)…xn(t)u1(t)u2(t)…up(t)t)f2(x1(t)x2(t)…xn(t)u1(t)u2(t)…up(t)t)左fn(x1(t)x2(t)…xn(t)u1(t)u2(t)…up(t)ttttttttttttttttttttttttttttt)21。nXt0=X0。DO。qA4。DO。。u2(t)J=tft0乙u2(t)dt。左左1Fig.1DailyVariationofInfluentFlow2.12.0521.951.91.851.81.751.7／m3·h-110203040506070／h×1042DOFig.2DiagramofTraditionalDOControlSystem3DOFig.3DiagramofOptimizedDOControlSystemPIDDODO∧qAb71--Vol.30,No.6,2011DODO。3DODOave。minJ=T0乙qA2dt+T0乙DO-DOave2dt3umin≤u(t)≤umax。DO3~8。2.3DO4DO。。、、。PLC。。C#visualstudio2005。wincc[4]6.2。SQLServer2005。PLCABPLC[5]。。DO5。qA。3DODO。49mg／L1.0mg／L98%58mg／L9.8mg／L83%8.0mg／L0.41mg／L95%GB18918—2002A。DO±0.2mg／L。DO6。ADOBDO。DODO。DODO。DODO±0.2mg／L。qA 4DOFig.4SchematicDiagramofOptimizedDOControlSystem5DOFig.5FlowChartofOptimizedDOControlSystemDOqAqADODONYNDO／mg·L-1B987654321005101520253035／h.A／A／O72--WATERPURIFICATIONTECHNOLOGYVol.30,No.6,2011December25th,2011DOmg/LDOmg/L4DODO。DODODO。DO±0.2mg／LDO。DO。。1DODO。2。“”“”。、、。。1,.、[M].:,2005.2GustafOlsson.、[M].:,2007.3.[M].:,2008.4.[J].,2011,30(4):84-88.5,.(PLC)[J].,2010,29(5):80-83.6DOFig.6VariationofDODO／mg·L-1A654321005101520253035／h73--