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蔡汉生1,金小明1,王华伟2,吴娅妮2(1.南方电网技术研究中心,广州510620;2.中国电力科学研究院,北京100081):,,EMTDC,,,:;;;;;;:TM726:A:10036520(2009)11263406:(2006BAA2A18)ProjectSupportedbyNationalEleventhfiveYearScienceandTechnologySupportingProgramofChina(2006BAA2A18).TemporaryOvervoltageandMitigationMeasuresforIslandingOperationofYunGuangUHVDCCAIHansheng1,JINXiaoming1,WANGHuawei2,WUYani2(1.TechnologyResearchCenterofChinaSouthernGrid,Guangzhou510620,China;2.ChinaElectricPowerResearchInstitute,Beijing100081,China)Abstract:HighamplitudeovervoltagewilloccurintheACsystemafterthebipoleblockingundertheislandingoperationofYunGuangUHVDC.Overvoltagecontrolisakeyfactor,becauseitcandecidethattheislandingoperationcanbeadoptedornot.Overvoltagelevel,energyofMOAandtransientrecoveryvoltageofACfilterbreakerarecalculatedusingEMTDCprogram.Afteranalyzingandcomparingavarietyofovervoltagesuppressingmeasures,usingthemagneticsaturationofconvertertransformerstosuppressovervoltageisputforward.InfluenceonovervoltageofswitchingofftimingofACfiltersandconvertertransformerswhenDClinkblockedisalsoinvestigated.Atlast,overvoltagemitigationmeasuresarepresented.Keywords:YunGuangUHVDC;islandingoperation;DCblocking;overvoltage;suppressionmeasures;MOA;TRV0,[1,2]:,,1000MW[1,2],,,[3],,,[47],15000MW,!800kV,121418km,6∀630mm2,173179MVA,187MVA,4,935MVA(5∀187MVA)[8]1-,,1~2,#2634#351120091130HighVoltageEngineeringVol.35No.11Nov.30,2009500kV,--,-,22.1,EMTDC,,,,11,[9,10],:,;,;;,,2.22,,U0=5502/3kV(),,,100ms,(1.59~1.65)U0100ms,,1150U0,100ms145U0,120ms1.30U0,91.40U060ms,100ms,100ms,1~4(1.54~1.60)U0,5~9(1.43~1.54)U0,150ms1.25U0100ms,4150ms1Fig.1WiringdiagramofChuxiongconverterstationconnectedtoACsystem1Tab.1IslandingoperationofYunGuangUHVDC/MW/MW/MVA1632154005000288025342590055003040343425200500027204424252005000288054221400037502240642113400300017607323239003750208082142380035002080911423100300017601331127002500130922322330027501496323222600250013094222226002500130952211200018759356221120001500748722222000187593581122190017509359112219001500748130U0,100ms,3208kJ1~4(),#2635#20091135112Tab.2Switchingovervoltageandtemporaryovervoltageunderdifferentislandingoperation60ms100ms150ms100ms20ms100ms120ms150ms100ms150ms11.646153kJ/1140A1.601.233018kJ/706A1.471.431.281.232955kJ/706A1.421.2621.656514kJ/936A1.591.203025kJ/750A1.471.451.291.202984kJ/750A1.441.2631.644116kJ/973A1.541.192935kJ/715A1.481.431.251.202864kJ/715A1.431.2741.657356kJ/1282A1.631.183208kJ/757A1.501.421.271.213200kJ/757A1.451.3251.634190kJ/584A1.541.202466kJ/584A1.431.401.251.182465kJ/584A1.371.2161.592024kJ/522A1.431.181949kJ/522A1.421.351.271.201949kJ/522A1.371.2171.643172kJ/633A1.471.182766kJ/633A1.461.411.271.222745kJ/633A1.431.2581.624268kJ/576A1.531.172488kJ/576A1.441.411.261.182480kJ/576A1.411.2591.624091kJ/582A1.511.162788kJ/582A1.441.411.261.222749kJ/582A1.411.242935~3208kJ;5~90.6~0.75,1949~2788kJ60ms,,7356kJ(4),40ms,,,,,,2323,2,;3,2.3,3,,100ms,(1.54~1.64)U0100ms,1674kJ,60ms,100ms,2194kJ,,20ms1.46U0,100ms,145U0,,2,120ms130U0100ms,23,,2.4[11],,,,50ms,,150ms(50ms),,,(154~164)U0,#2636#Nov.2009HighVoltageEngineeringVol.35No.113Tab.3Overvoltageofmonopoleblockingunderislandingoperation60ms100ms150ms100ms20ms100ms120ms150ms100ms150ms11.631882kJ/578A1.421.151543kJ/587A1.461.361.241.241543kJ/587A1.381.1921.631656kJ/582A1.431.201663kJ/582A1.451.431.331.271452kJ/582A1.391.2031.641984kJ/692A1.451.231674kJ/692A1.411.451.291.251385kJ/692A1.341.1341.632194kJ/600A1.441.221550kJ/600A1.441.341.211.171550kJ/600A1.331.1651.631919kJ/586A1.441.131604kJ/586A1.451.441.291.251604kJ/586A1.391.3061.54627kJ/437A1.331.15605kJ/437A1.341.391.221.16595kJ/437A1.321.2071.601353kJ/539A1.381.101208kJ/539A1.361.441.291.171064kJ/539A1.321.1381.622044kJ/573A1.431.161494kJ/573A1.401.371.281.241467kJ/573A1.381.2691.55852kJ/458A1.371.17764kJ/458A1.351.431.231.10739kJ/458A1.271.19,,2(153~164)U0,110ms(130~139)U092804~5211kJ2.5187MVA,411/24413/36237:1HP11/24HP13/26HP3SCSC,ABCD();2HP11/24HP13/26HP3SC;34HP11/24HP13/26SCSC,,4,,1~4∃%&∋;,;;:1),100ms,HP3,,1374kV110kV/s,1256kV,077kV/s2),5356A100ms,4003A3),,HP3,HP3,1542kV135kV/s3,,,,,,:(1);(2);(3):;/[1214];;/[15];;(voltageclampingdevice);,,,,;,,[9,10]/,#2637#20091135114(,)Tab.4TRVoflargegroupACFbreaker1234/kV/(kV#s-1)(/)/A()/A1ABCDDABCDABDAB1232%0.853791/13554994ABCDDABCABDDAB1243%0.843709/135549742ABCDDABCDABDABD1233%0.773685/13584813ABCDDABCABDDABD1256%0.773686/135848173ABCDDABCDABAB1232∃0.753450/13244847ABCDDABCABDAB1236%0.763586/133148344ABCDDABCDABABD1247∋0.893737/13635013ABCDDABCABABDD1246∋0.893869/136350035ABCABCABAB1206&∋0.782208/6643080ABCDDABCAB1225%0.943630/13135155ABCDDCABAB1374%1.103509/131251276ABCABAB1210∃0.512064/6443149CABABAB1357∃0.941211/51924407ABCABCABA1200&0.502074/7842982ACABCABAB1203∃0.532100/78227908ABCDDABAB1233%&0.544003/12195356ABCCABABD1360%0.982223/8023123ABCABCABA1228%0.582209/80030609ABCABCAB1211%0.442068/7793053CABCABAB1319∃0.871990/7853043,/765kV,,,,,,,100ms(1338~1407)U0,(1491~1570)U0,1542kV3208kJ,:;TRV[16];A[17],,,4,,4,/,#2638#Nov.2009HighVoltageEngineeringVol.35No.11[1],,,.!800kV[R].:,2007.[2],,,.!80