吴广宁
个性化签名
- 姓名:吴广宁
- 目前身份:
- 担任导师情况:
- 学位:
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学术头衔:
国家杰出青年科学基金获得者, 教育部“新世纪优秀人才支持计划”入选者, 博士生导师
- 职称:-
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学科领域:
高电压工程
- 研究兴趣:
西南交通大学电气工程学院,1999年晋升教授,2001年聘为博士生导师,2011年晋升二级教授,IET Fellow,国家杰出青年科学基金、教育部新世纪优秀人才获得者,“高电压技术”国家精品课程主持人,四川省学术和技术带头人,获得“四川省优秀教师”称号和第四届四川省教学名师奖。主要围绕高速电气化铁路牵引供电关键设备安全运行及状态评价开展科研与教学工作。
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主页访问
5451
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关注数
0
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成果阅读
854
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成果数
20
吴广宁, Guangning Wu, Senior Member, IEEE, Liren Zhou, Xueqin Zhang, Shanshan Bian, Hanzheng Ran, and Chenglong Yu
,-0001,():
-1年11月30日
High-voltage storage capacitors, which have composite insulations of polypropylene film and paper impregnated with oil, are working under charge–discharge mode. The insulations are not only exposed to electrical stress but also to thermal stress.Failure factors of composite insulation in capacitors are analyzed from three aspects: partial discharge (PD), space charge, and thermal factors. In order to investigate the possible influences on the dielectric properties of materials in capacitors, aging tests were conducted on the capacitors. Some parameters were detected in aged capacitors compared with nonaged ones. Experimental results reveal that PD is the key factor leading to the breakdown of the capacitor, space charge is the direct factor that induces the breakdown, and thermal factor just accelerates the degradation process.
Composite insulation,, high voltage,, partial discharge (, PD), ,, space charge,, storage capacitor,, thermal factor.,
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31浏览
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【期刊论文】Study on the Performance of Integrated Grounding Line in High-Speed Railway
吴广宁, Guangning Wu, Guoqiang Gao, Anping Dong, Lijun Zhou, Xiaobin Cao, Wangang Wang, Bo Wang, Yuanfang Tang, and Jigang Chen
,-0001,():
-1年11月30日
Grounding impedance,, high-speed railway (, HSR), ,, integrated grounding line (, IGL), ,, shunting coefficient.,
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50浏览
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【期刊论文】Study on Charge Transport Mechanism and Space Charge Characteristics of Polyimide Films
吴广宁, L. R. Zhou, G. N. Wu, B. Gao, K. Zhou, J. Liu, K. J. Cao andL. J. Zhou
,-0001,():
-1年11月30日
Inverter-fed motor,, polyimide,, charge transport,, space charge,, PEA,, pulse voltage,, aging
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32浏览
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5下载
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吴广宁, WU GuangNing , CAO KaiJiang, LUO Yang, GAO Bo, WANG Peng, ZHANG YiQiang , XU HuiHui
,-0001,():
-1年11月30日
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32浏览
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3下载
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吴广宁, WU GuangNing , BIAN ShanShan , ZHOU LiRen , ZHANG XueQin , RAN HanZheng, YU ChengLong
,-0001,():
-1年11月30日
high voltage,, storage capacitor,, partial discharge,, composite insulation,, DC,, pattern recognition
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32浏览
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3下载
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【期刊论文】Modeling of Transient Moisture Equilibrium in Oil-paper Insulation
吴广宁, L.J. Zhou, G.N. Wu and J. Liu
,-0001,():
-1年11月30日
Moisture equilibrium,, oil insulation,, paper insulation,, transient model.,
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43浏览
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3下载
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吴广宁, G. N. Wu, J. D. Wu, L. R. Zhou, B. Gao, K. Zhou, X. X. Guo andK. J. Cao
,-0001,():
-1年11月30日
Polyimide film,, pulse voltage,, aging,, thermally stimulated current,, activation energy,, charge density.,
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32浏览
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吴广宁, Yang Luo, Guangning Wu, Jiwu Liu, Guangya Zhu, Peng Wang, Jia Peng, Kaijang Cao
,-0001,():
-1年11月30日
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41浏览
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吴广宁, Luo Yang, Wu Guang-Ning, Liu Ji-Wu, Peng Jia, Gao Guo-Qiang, Zhu Guang-Ya, Wang Peng, Cao Kai-Jiang
,-0001,():
-1年11月30日
Polyimide (PI) film is an important type of insulating material used in inverter-fed motors. Partial discharge (PD) under a sequence of high-frequency square impulses is one of the key factors that lead to premature failures in insulation systems of inverter-fed motors. In order to explore the damage mechanism of PI film caused by discharge, an aging system of surface discharge under bipolar continuous square impulse voltage (BCSIV) is designed based on the ASTM 2275 01 standard and the electrical aging tests of PI film samples are performed above the partial discharge inception voltage(PDIV). The chemical bonds of PI polymer chains are analyzed through Fourier transform infrared spectroscopy (FTIR)and the dielectric properties of unaged and aged PI samples are investigated by LCR testers HIOKI 3532-50. Finally, the micro-morphology and micro-structure changes of PI film samples are observed through scanning electron microscopy (SEM). The results show that the physical and chemical effects of discharge cut off the chemical bonds of PI polymerchains. The fractures of ether bond (C–O–C) and imide ring (C–N–C) on the backbone of a PI polymer chain leads to the decrease of molecular weight, which results in the degradation of PI polymers and the generation of new chemical groups and materials, like carboxylic acid, ketone, aldehydes, etc. The variation of microscopic structure of PI polymers can change the orientation ability of polarizable units when the samples are under an AC electric field, which would cause the dielectric constant e to increase and dielectric loss tan d to decrease. The SEM images show that the degradation path of PI film is initiated from the surface and then gradually extends to the interior with continuous aging. The injection charge could result in the PI macromolecular chain degradation and increase the trap density in the PI polymer bulk.
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42浏览
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【期刊论文】Influence of Pollution Distribution on Insulator Surface on Flashover Characteristics
吴广宁
,-0001,():
-1年11月30日
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31浏览
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