Effect on Inner Electrical Field Distributions of EHV Converter Transformer by Insulation Material Characteristics
In order to analyze inner electrical field distributions of EHV converter transformers windings end at valve side, a simulation circuit model of oil-paper combination insulations is established in this paper.Then ANSYS10.0 finite element method(FEM) is used to calculate the electrical field distributions under four different excited volatges, containing DC voltage, AC voltage, superimposed DC-AC voltage and polarity reversal (PR) voltage respectively.Simulation results show that when only under DC voltage, resistive electrical field distributions highly convergen on insulating cardboard whose resistivity is correspondingly big.While only under AC voltage, capactive electrical filed distributions highly centeralize on insulating oil whose dielectic capacity is correspondingly small.And under superimposed DC-AC voltage, its nnformity lies in DC voltage or AC voltage function alone.While under transient polarity reversal volatge, its distrbutions present like tooth and electrical strength of insulating oil is bigger than that of insulating paper.
Insulation Charactersitics HVDC power transmission Converter transformer Oil-paper combination insulation model Polarity reversal voltage
Ping Zhang Xin-peng Nie Jun-ping Meng You-hua Wang
Hebei University of Technology,Control Science and Engineering department,China;province-Ministry Jo Gamesa Wind (Tianjin) Cor.,Ltd.,China Institute of Power Source and Ecomaterials Science,Hebei University of Technology,China province-Ministry Joint Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability
国际会议
2012 China Functional Materials Technology and Industry Forum(2012中国功能材料科技与产业高层论坛)(CFMTIF2012)
昆明
英文
241-247
2012-11-09（万方平台首次上网日期，不代表论文的发表时间）