Research on the dynamic characteristics of electric field distribution of the±1100 kV Ultra high voltage converter transformer valve‐side bushing using weakly ionised gas conductance model  

作　　者：Qingyu Wang Peng Liu Huidong Tian Gengsheng Xie Zongren Peng Xi Yang 

机构地区：[1]State Key Laboratory of Electrical Insulation and Power Equipment,Xi'an Jiaotong University,Xi'an,Shaanxi,China [2]Anhui Provincial Laboratory of Renewable Energy Utilization and Energy Saving,Hefei University of Technology,Hefei,Anhui,China

出　　处：《High Voltage》2022年第2期288-301,共14页高电压（英文）

基　　金：supported by the Science and Technology Project of State Grid Corporation of China(SGLND K00KJJS1900250);the National Natural Science Foundation of China(51807045);the National Key Research and Development Program of China(2017YFB0902702).

摘　　要：Ultra high voltage(UHV)converter transformer valve‐side bushings are the key equipment indirect current(DC)transmission projects,and are subjected to high voltage and large current with large number of harmonics simultaneously.The electric field distribution of converter transformer valve‐side bushings is time‐dependent under DC voltage,polarity reversal voltage and actual voltage waveforms,and the electric and temperature field are coupling with each other in actual operation.The dynamic char-acteristics of the surface charges and the electric field distribution of China's first�1100 kV epoxy/paper-SF6 composite insulation converter trans former valve‐side bushing under 2 h DC withstand test voltage and polarity reversal voltage were analysed considering the natural ionisation,drifting,diffusion and recombination processes of positive and negative ions in SF6 gas and air.The time‐dependent electro‐thermal coupling field of the bushing under the actual voltage waveform in one cycle was ob-tained.The rationality of the simulation method adopted was verified through type tests of the UHV converter transformer valve‐side bushing.The simulation results of the paper can provide a theoretical foundation for the design of converter transformer valve‐side bushings and it is of great significance to ensure the safe operation of converter stations.

关 键 词：CONVERTER distribution field 

分 类 号：TM41[电气工程—电器]