(641003):,,。:;;:TM406:B:1001-8425(2009)11-0067-04AnalysisofOverproofUnbalanceRateofDirectCurrentResistanceYINDe-jian(NeijiangElectricPowerBureau,Neijiang641003,China)Abstract:Basedonthestructureandtechnologyoftransformer,thereasonsfortheover-proofunbalancerateofdirectcurrentresistanceinoperationareanalyzed.Thebasicmethodsoffaultlocationanddiagnosisarepresented.Keywords:Transformer;Directcurrentresistance;Analysis1,,。,,,。,,,,。,,。2、、。,:(1)()。(2)n(n<N,N)。(3),()()。(1,B,M。),:①。②。③。④OABCX9Y9Z9Y1X1Z1YK′YKNZKXKY′B′1Fig.1Connectiondiagramofwindingonregulationside4611200911TRANSFORMERVol.46NovemberNo.11200946、。⑤。33.1,,。,,,,,,。,、。,、,,,、、,,。(),,、、,、、、,、,,。,,,,(A)、(B)、(C)、(D)、(E)(F)。、、、、。1,:(1):B,C。(2):B,E。(3):B、B′,A。(4):YK′、YK,A。(5):YK,B。(6)、:“+、-”、“Y1-Y9”,D。(7):“K、+、-”、:Y1-Y9,B。(8):A。(9)“Y”:Y′Y,A。(10):NY′、YO,B。(11):B。:A———,、。(3)、(4)、(8)、(9)。,,,,。,、、,,。(3):B,,,,。,,,。B′,,,,,,,,,。(4)、(8)、(9),。,,1.5m,6811,。B———,,(5)、(7)、(10)、(11)。,,。,、,0.02mm、。(5)、(7)、(10):1.5m,,,,,,,。(11):,、、,。C———,,(1)。。,,100%,,、、、,。D———。M、,(6)。、,。,,,。(6):“+、-”2、、,,,,;,2,2,,,()。,,,,。,,,。E———,。,(2)。,,,,,。,。,,,。F———,,,。,,,、,、。。3.2,1.5m,。,,,。,,,,,。,,,,、,,,。,,,、,,6946、,,,,,,,,。,,(A)(F),(D)、(B),。,,、、,,,。,,。,,,。4,:(1),,,。(2),,,、,。(3)、、,、,。(4),,,,。(5),,,。5,,、、,,。,,、,,,,。:2009-02-02:(1956-),,,,。!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!5(1),,,,。66kV,。(2),、、,。,,2,。(3),,LA,。:[1]DL/T596-1996,[S].[2].[M].:,1983.:2008-10-20:(1969-),,,,、。(64)70