Study on micro bridge impurities in oil-paper insulation at DC voltage: their generation, growth and interaction with partial discharge
Li, Yuan, Zhang, Qiaogen, Li, Jinzhong, Wang, Tonglei, Dong, Wenlong, Ni, Heli
Published in IEEE transactions on dielectrics and electrical insulation (01.08.2016)
Published in IEEE transactions on dielectrics and electrical insulation (01.08.2016)
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Journal Article
Capacitive voltage sensor array for detecting transient voltage distribution in transformer windings
Wang, Tonglei, Zhang, Qiaogen, Ni, Heli, Li, Yuan, Gao, Meng, Ding, Yuqin, Yuan, Weixiong, Zang, Ying
Published in IEEE transactions on dielectrics and electrical insulation (01.10.2016)
Published in IEEE transactions on dielectrics and electrical insulation (01.10.2016)
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Journal Article
A Validity Analysis of Extending Front Time in Lightning Impulse Tests for Ultrahigh-Voltage Transformers
Ni, Heli, Zhang, Qiaogen, Zhao, Yi, Wen, Tao, Guo, Chong
Published in IEEE transactions on power delivery (01.04.2020)
Published in IEEE transactions on power delivery (01.04.2020)
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Journal Article
Study on characteristics of moisture diffusion in multi-layer paper insulation
Meng Gao, Qiaogen Zhang, Heli Ni, Yuqin Ding, Weixiong Yuan
Published in 2017 IEEE 19th International Conference on Dielectric Liquids (ICDL) (01.06.2017)
Published in 2017 IEEE 19th International Conference on Dielectric Liquids (ICDL) (01.06.2017)
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Conference Proceeding
Study on gas bubble formation in single-layer paper insulation
Meng Gao, Qiaogen Zhang, Heli Ni, Yuqin Ding, Weixiong Yuan
Published in 2017 1st International Conference on Electrical Materials and Power Equipment (ICEMPE) (01.05.2017)
Published in 2017 1st International Conference on Electrical Materials and Power Equipment (ICEMPE) (01.05.2017)
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Conference Proceeding
Wavefront dependent dielectric strength of transformer oil under double-exponential impulse voltage
Ni, Heli, Guo, Ning, Zhao, Yi, Li, Xiaoang, Zhang, Qiaogen, Yuan, Weixiong, Liu, Xuandong, Wang, Tonglei
Published in IEEE transactions on dielectrics and electrical insulation (01.10.2018)
Published in IEEE transactions on dielectrics and electrical insulation (01.10.2018)
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Journal Article
Influence of fiber impurities on DC partial discharge process in oil-pressboard insulation
Yuan Li, Qiaogen Zhang, Meng Gao, Heli Ni, Yi Zhao, Guangqi Liu, Ke Wang
Published in 2017 IEEE 19th International Conference on Dielectric Liquids (ICDL) (01.06.2017)
Published in 2017 IEEE 19th International Conference on Dielectric Liquids (ICDL) (01.06.2017)
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Conference Proceeding
Study on impulse breakdown characteristics in transformer oil with different electrode materials
Heli Ni, Tonglei Wang, Weixiong Yuan, Meng Gao, Yuan Li, Yuqin Ding, Qiaogen Zhang
Published in 2016 IEEE International Power Modulator and High Voltage Conference (IPMHVC) (01.07.2016)
Published in 2016 IEEE International Power Modulator and High Voltage Conference (IPMHVC) (01.07.2016)
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Conference Proceeding
Effect of hydrostatic pressure on the impulse breakdown characteristics of transformer oil
Tonglei Wang, Heli Ni, Weixiong Yuan, Meng Gao, Yuqin Ding, Yuan Li, Qiaogen Zhang
Published in 2016 IEEE International Power Modulator and High Voltage Conference (IPMHVC) (01.07.2016)
Published in 2016 IEEE International Power Modulator and High Voltage Conference (IPMHVC) (01.07.2016)
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Conference Proceeding
Evaluation of the Martin empirical formulae for transformer oil: Statistical meaning of the time parameter
Heli Ni, Weixiong Yuan, Meng Gao, Yuqin Ding, Jingtan Ma, Zhicheng Wu, Qiaogen Zhang
Published in 2017 IEEE Electrical Insulation Conference (EIC) (01.06.2017)
Published in 2017 IEEE Electrical Insulation Conference (EIC) (01.06.2017)
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Conference Proceeding
Modified thermal circuit model for distribution transformers in three-phase unbalanced operation
Yuqin Ding, Qiaogen Zhang, Xuandong Liu, Meng Gao, Tonglei Wang, Heli Ni, Weixiong Yuan, Guangqi Liu, Ke Wang
Published in 2017 1st International Conference on Electrical Materials and Power Equipment (ICEMPE) (01.05.2017)
Published in 2017 1st International Conference on Electrical Materials and Power Equipment (ICEMPE) (01.05.2017)
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Conference Proceeding
Weibull statistical analysis of size effects on the impulse breakdown strength in transformer oil
Weixiong Yuan, Tonglei Wang, Heli Ni, Meng Gao, Yuqin Ding, Yuan Li, Yi Zhao, Qiaogen Zhang
Published in 2017 IEEE 19th International Conference on Dielectric Liquids (ICDL) (01.06.2017)
Published in 2017 IEEE 19th International Conference on Dielectric Liquids (ICDL) (01.06.2017)
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Conference Proceeding