温-频耦合效应对高频固态变压器绝缘局部放电特性的影响

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摘要高频固态变压器的强温-频耦合效应会导致其绝缘过早失效,而局部放电是其失效的主要原因之一。为研究温度和频率交互作用对高频绝缘系统局部放电特性的影响,建立了电-热联合实验平台,模拟了固态变压器聚酰亚胺绝缘在30~160℃四个温度点和10~50kHz五个频率点下的局部放电情况,阐明了典型局放特征参量随温度和频率的变化规律,并分析了其作用机理。实验结果表明,随着温度升高,最大放电幅值、放电次数和平均放电幅值都呈上升趋势,而频率则与这些特征量呈负相关,放电起始电压基本不随频率而改变。频变导致的空间电荷累积效应对局放特征变化起主导作用,频率-温度的协同作用改变了绝缘电导率以及电极-绝缘系统的切向电场分量,对局部放电发展具有显著影响。

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	韩帅
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	王高勇
	魏晓光

关键词 ：固态变压器, 局部放电, 温-频耦合效应, 空间电荷, 电导率

Abstract：Partial discharge(PD) is one of the main causes of the insulation failure in the high frequency solid state transformer(SST). A comprehensive thermal-electrical test rig is established as to study the impacts of the coupled temperature-frequency effects. Four temperature points from 30℃ to 160℃, together with five frequency points from 10kHz to 50kHz, are chosen to physically model the partial discharge scenario in the SST, and the temperature- and frequency-dependent characteristics of several typical PD parameters are elucidated in details. The experimental results show that, the maximum and the mean discharge amplitudes as well as the discharge times render an increasing tendency with temperature rising, while the frequency-dependent behavior gives a negative correlation. However, the PDIV keeps roughly constant with frequency variation. The frequency-induced of space charge accumulation effect plays a dominant role in the above physical changes, in the meanwhile, the coupled temperature-frequency stress changes the insulation permeability as well as the tangential E-field vector, which executes a prominent impact on the PD development.

Key words： Solid state transformer partial discharge coupled temperature-frequency effect space charge conductivity

收稿日期: 2013-12-03 出版日期: 2015-04-14

PACS:

TM855

基金资助:国家高技术研究发展计划（863计划）（2012AA052701,2012AA052702）和北京市自然科学基金（3142018）资助项目

作者简介: 韩帅男,1986年生,博士研究生,研究方向为高压高频电力变压器及其绝缘优化。李庆民男,1968年生,教授,博士生导师,研究方向为高电压与绝缘技术。

引用本文:

韩帅,李庆民,刘伟杰,鲁旭,王高勇,魏晓光. 温-频耦合效应对高频固态变压器绝缘局部放电特性的影响[J]. 电工技术学报, 2015, 30(2): 204-210. Han Shuai,Li Qingmin,Liu Weijie,Lu Xu,Wang Gaoyong,Wei Xiaoguang. Impacts of Coupled Temperature-Frequency Effects on Partial Discharge Characteristics of High Frequency Solid State Transformer Insulation. Transactions of China Electrotechnical Society, 2015, 30(2): 204-210.

链接本文:

http://dgjsxb.ces-transaction.com/CN/Y2015/V30/I2/204

[1] 毛承雄, 范澍, 王丹, 等. 电力电子变压器的理论及其应用(I)[J]. 高电压技术, 2003, 29(10): 4-6. Mao Chengxiong, Fan Shu, Wang Dan, et al. Theory of power electric transformer and its applications(I) [J]. High Voltage Engineering, 2003, 29(10): 4-6.
[2] 刘海波, 毛承雄, 陆继明, 等. 电子电力变压器与常规电力变压器的并联技术[J]. 电力系统自动化, 2008, 32(18): 49-54. Liu Haibo, Mao Chengxiong, Lu Jiming, et al. Parallel technology of electronic power transformer and conventional power transformer[J]. Automation of Electric Power System, 2008, 32(18): 49-54.
[3] Seunghun Baek, Yu Du, Gangyao Wang. Design considerations of high voltage and high frequency transformer for solid state transformer application[C]. IECON 2010-6th Annual Conference on IEEE Industrial Electronics Society, North Carolina State, 2010: 421- 426.
[4] 韩帅, 张黎, 谭兴国, 等. 基于损耗分析的大容量高频变压器铁心材料选型方法[J]. 高电压技术, 2012, 38(6): 1486-1491. Han Shuai, Zhang Li, Tan Xingguo, et al. Material selection based on loss characterization for high-power high-frequency transformer cores[J]. High Voltage Engineering, 2012, 38(6): 1486-1491.
[5] Lothar Heinemann. An actively cooled high power, high frequency transformer with high insulation capa- bility[C]. IEEE Applied Power Electronics Conference and Exposition, Dallas, TX, Mar 10-14, 2002: 352- 357.
[6] Leung C, Dutta S, Baek S, et al. Design considera- tions of high voltage and high frequency three phase transformer for Solid State Transformer application [C]. Energy Conversion Congress and Exposition (ECCE), Atlanta, GA, 2010: 1551-1558.
[7] Sili E, Cambronne J P, Naude N, et al. Polyimide lifetime under partial discharge aging: effects of temperature, pressure and humidity[J]. IEEE Transac- tions on Dielectrics and Electrical Insulation, 2013, 20(2): 435-442.
[8] Fabiani D, Montanari G C, Cavallini A, et al. Relation between space charge accumulation and partial discharge activity in enameled wires under PWM-like voltage waveforms[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2004, 11(3): 393-405.
[9] 王辉, 李成榕, 贺惠民, 等. 温度对油纸绝缘沿面放电发展过程的影响[J]. 高电压技术, 2010, 36(4): 884-890. Wang Hui, Li Chengrong, He Huimin, et al. Influence of temperature on developing processes of surface discharges in oil-paper insulation[J]. High Voltage Engineering, 2010, 36(4): 884-890.
[10] 罗杨, 吴广宁, 王鹏, 等. 连续方波脉冲电压下温度对聚酰亚胺薄膜局部放电特性的影响[J]. 中国电机工程学报, 2012, 32(19): 154-160. Luo Yang, Wu Guangning, Wang Peng, et al. Effect of temperature on partial discharge properties of polyimide film under continuous square impulse voltage [J]. Proceedings of the Chinese Society for Electrical Engineering, 2012, 32(19): 154-160.
[11] Qin H, Kimball J. Solid state transformer architecture using AC-AC dual active bridge converter[J]. IEEE Transactions on Industrial Electronics, 2013, 60(9): 3720-3730.
[12] 刁常晋, 程养春, 邓春, 等. 阶梯升压实验和恒定电压实验中油纸绝缘局部放电发展规律的对比[J]. 高电压技术, 2013, 39(2): 365-373. Diao Changjin, Cheng Yangchun, Deng Chun. et al. Contrast of the developing regularity of partial discharge of oil-paper insulation using step-stress test and constant-stress test[J]. High Voltage Engineering, 2013, 39(2): 365-373.
[13] Guastavino F, Dardano A, Torello E. Measuring partial discharges under pulsed voltage conditions[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2008, 15(6): 1640-1648.
[14] 王彩雄, 唐志国, 常文治, 等. 一种多源局部放电信号分离方法[J]. 中国电机工程学报, 2013, 33(13): 212-219.
Wang Caixiong, Tang Zhiguo, Chang Wenzhi, et al. A method for multi-source partial discharge signals
15 separation[J]. Proceedings of the CSEE, 2013, 33(13): 212-219.
[15] 于钦学, 印昌容. 油纸绝缘直流局部放电的研究[J]. 变压器, 1998, 35(5): 17-20. Yu Qinxue, Yin Changrong. Study on partial discharge in oil-insulation under DC voltage[J]. Transformer, 1998, 35(5): 17-20.
[16] 潘俊, 方志. 多脉冲均匀介质阻挡放电特性的仿真及实验研究[J]. 高电压技术, 2012, 38(5): 1132-1140. Pan Jun, Fang Zhi. Simulation and experimental studies on discharge characteristics of multiple pulse homo- geneous dielectric barrier discharge[J]. High Voltage Engineering, 2012, 38(5): 1132-1140.
[17] 王新新. 介质阻挡放电及其应用[J]. 高电压技术, 2009, 35(1): 1-11. Wang Xinxin. Dielectric barrier discharge and its applications[J]. High Voltage Engineering, 2009, 35(1): 1-11.
[18] 钟力生, 李盛涛, 徐传骧. 工程电介质物理与介电现象[M]. 西安: 西安交通大学出版社, 2005.
[19] Wu K, Okamoto T, Suzuoki Y. Effects of discharge area and surface conductivity on partial discharge behavior in voids under square voltages[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2007, 14(2): 461-470.
[20] Hayakawa N, Inano H, Nakamura Y, et al. Time variation of partial discharge activity leading to break- down of magnet wire under repetitive surge voltage application[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2008, 15(6): 1701-1706.
[21] 周远翔, 聂琼, 邢晓亮, 等. 频率对高密度聚乙烯电树老化特性的影响[J]. 高电压技术, 2008, 34(2): 22-42. Zhou Yuanxiang, Nie Qiong, Xing Xiaoliang, et al. Effect of frequency on electrical treeing characteristics of high-density polyethylene[J]. High Voltage Enginee- ring, 2008, 34(2): 22-42.