硕士论文-高压电力电缆——架空混联线路接地保护方案探讨

上海交通大学硕士学位论文高压电力电缆——架空混联线路接地保护方案探讨姓名：肖成刚申请学位级别：硕士专业：电气工程指导教师：郁惟镛;陈曦20070601I-ATPII-30ABSTRACTIIITHENEWSCHEMEDISCUSSIONOFGROUNDEDPROTECTIONFORHIGHVOLTAGECABLES――AERIALLINEABSTRACTInthemodernsociety,moreandmoreelectricpowercablesandcable-lineshavebeenapplyingintheelectricpowernetworks.Atthesametimestheproblemsofrelayingprotectionhavediscovered.Theparametertraitsarenotsteadycontrastingwithlines’.Especiallytheparametertraitsofzero-orderwillbechangedbytheflowingzeroordercurrent.So,thedesignofrelayingprotectionaboutelectricpowercablesbecomecomplexfortheabovecauses.Anotherreasonisthattheresearchofrelayingprotectionaboutpowercablesisnotmature.Manytechnologyproblemsofcablesrelayingprotectionneedbestudiedinthefuture.Becausetheelectrictraitsofcablesarenotsamethelines’,theschemesofrelayingprotectionapplyinginlinesarenotsatisfiedforthepowercables.Theresearchofrelayingprotectionaboutelectricpowercablesandcable—lineswillbringoutmanyacademicmeaningandsocietybenefits.Themaintypesandtraitsofelectricpowercablesintheworldaresummarizedandanalysesinthefirstinthepaper.Theuniversaltraits,suchasimpedancetraitsandtherelationshipbetweenzeroordercurrentandzeroorderimpedance,aresetforth.Andthemaindifferencesbetweenpowercablesandaeriallinesareanalyzes.ThegroundeddistanceprotectionandABSTRACTIVzeroordercurrentprotectiontheorysofaeriallineissummarized,andthecoursesofrelayingprotectionsetaresetforth.Theabusesandbugsareanalyzesifthetraditionalrelayingprotectiontheoryoflinesshouldbeappliedinthecablesorcable-lines.Anewauto-adaptivealgorithmofgroundeddistancerelayingandzeroordercurrentprotectionsofelectricpowercablesisputforwarded.Thetraitsofnon-linearrelationshipbetweenzeroordercurrentandzeroimpedanceanddistributingparametermodelaretookintoaccount.Thezeroorderimpedanceandzeroordercurrentonfaultedcablepointarebecalculatedbyiterativeandinsertvaluemethod.Andthefaultedpointscouldbeidentifiedintheend.Theinfluencesofespecialelectrictraitsandgroundedresistancetorelayingprotectioncanbedebased.Theabilityofstandingagainsttransitionresisdancecanreach30ohm.Itcansatisfywiththerequestofrelayingrules.ThenewalgorithmhasbeenvalidatedbyATPmodelingandprograminMATLAB.Keywords:cable-aeriallineGroundeddistanceproteciton;zeroordercurrentprotection;auto-adaptivetechnology;zeroordercurrent;zeroorderimpedance200836___2008362008361.12:PDF-------XLPE---GISXLPE()1.2]41[−]155[−220kV110kV500kV]1311[−20203200kW30%500kV15220kV140500kV500kV500kV220kV]3416[−SCFF400kVXLPE90kVLPFF380kV,XLPE275kV12DPSRC(powersystemrelaycommittee)115kVIEEESR(safetyandreliability)PSRC(powersystemrelaycommittee)]4135[−1.31)2)3)ATPMATLAB4)2.12035kV35kVSF61234:570(XLPE)500kV80XLPE66-110kV1991110kV220kVXLPE110kV220kVXLPE198286::XLPE2.22.2.12.2.2(1)(2)2.2.3(1)(2)0110RR=0(3.5X=14.6)X2-12-1102-12.2.41,23Fig.2-1therelationshipcurvebetweenthezeroordercurrentandzeroorderimpedance452.31,,220kVab330500kV220kV500kV220kV,26Ω(0.5Ω)2.43.1(1)XXUI+30KI()ΙdzklZKZ=kKkK≤0.7lZ1dzZIΙdzklkTTZKZKZ=+kKkTKkK0.80.85kTK≤0.7TZ(2)11:ΠdzlmlZKZ=lmKkK1.31.5Π1ΙdzkkZdzZKZKKZ=+kK0.70.8ΙdzZIZK'Π1dzkkZlZKZKKZ=+kK0.70.8'lZ()()'Π1dzkkZZKZKKZ=+kK0.70.8'Z'Π1ΠdzkkZdzZKZKKZ=+kK0.70.8'ΠdzZ'Π1dzkkZTZKZKKZ=+kK0.70.8'TZ()a.20Π1022(13)dzkEUUZKIKI++=++b.2120Π21202(13)dzkaUUUZKaIaIKI++=++1U2U0U120,,IIIEkK0.70.8(3):Ш1dzlmZKZ=lmK1.83.0'ШΠdzklkzdzZKZKKZ=+kK0.70.8'ΠdzZII'ШШdzklkzdzZKZKKZ=+kK0.70.8'ШdzZIII(4)03jAIIKI=+0113ZZKZ−=K0Z3.23.2.12-13-12-1Tab.3-1themathematicmodelaboutfig.2-103IA01/RR01/XX03IA01/RR01/XX1021.3894.777812.5893204.611115.848919.16654.555619.9526204.722225.118923.0555531.622823.8895.166739.810724.7225.444450.118726.94455.833363.095724.44446.579.432834.16657.166710036.3897.5125.892537.57.6667158.489337.57.6199.526336.1117.5251.1886357.3056316.2287337398.107231.66656.6667501.1872306.3333630.957326.94455.9444794.328225.55555.5556100024.44455.22221258.925422.2224.77781584.893220.5554.51955.262318.6114.22222511.886416.94453.88893162.277715.55553.69443981.0717153.55011.872313.61113.256309.573412.7783.11117943.282311.38852.94441000010.2782.777812589.25419.7722.611115848.93199.16652.444419952.62318.6112.333325118.86438.0552.277831622.77667.52.166739810.71716.66652.111150118.72346.252.055663095.73455.83351.944479432.82355.41651.833310000051.77783-13-13-23-1Fig.3-1therelationshipbetweenzeroordercurrentandzeroorderresistance3-2Fig.3-2therelationshipbetweenzeroordercurrentandzeroorderreactance03I01/RR03I01/XX01(3)90arg270setjUIKIZUeφφφθφ−+≤≤oo0113ZZKZ−=0I01001011()3()3()390arg270setjRRIjZZIUIZZUeφφφθφ−+−−+≤≤oo(3-13):UφIφ1jUeφθφsetZ1Z010()3RRI−=0101(1)3RRIR−010()3XXI−=0101(1)3XXIX−11,RX001(1)3RIR−001(1)3XIX−3-33-43-3b01RR011RR−(0111RRRR−)3-4a01XX3-3001(1)3RIR−Fig.3-3thechartofthearea001(1)3RIR−3-4001(1)3XIX−Fig.3-4thechartofthearea001(1)3XIX−01RR03I01XX03I3-23-2Tab.3-2therelationshipbetweencurrentandcutarea03IA001(1)3RIR−001(1)3XIX−03IA001(1)3RIR−001(1)3XIX−10203.8937.77812.5893239.196745.4612215.8489287.91956.3523519.9526379.099474.2675725.1189554.0099100.475631.6228723.8143131.762739.8107944.3894176.934750.11871300.305242.238763.09571479.241347