基于Kerr效应法的油纸复合绝缘交直流复合电场测量

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (698 KB)
输出: BibTeX | EndNote (RIS)

摘要油纸复合绝缘作为换流变压器阀侧绕组的主绝缘形式, 在正常工况下同时承担着交、直流复合电压, 阀侧绕组的电场分布比普通电力变压器更为复杂, 而目前的仿真研究均缺乏有效的试验验证。本文基于变压器油的Kerr效应, 搭建了油纸绝缘结构下光学空间电场的二维测量平台, 实现了变压器油中电场的在线分布式测量。针对双层纸板的交叠绝缘结构, 实际测量不同交直流比例电压下, 交、直流电场的分布特性。试验结果表明:①交流电场分布具有明显的结构对称特性, 且油中各处交流电场与外施交流电压保持线性关系。②直流电场分布不具有对称性。在正极性直流电压下, 纸板覆盖上电极的单层纸板区域电场远小于纸板覆盖下电极的单层纸板区域, 且直流电场强度不随外施直流电压线性增长。不同位置处空间电荷积聚的差异是直流电场分布非对称性的主要原因。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章

关键词 ：交直流复合电场, Kerr效应, 油纸绝缘, 空间电荷, 非线性

Abstract：The valve winding in the converter transformer withstands combined AC-DC voltage in normal condition. The distribution of electric filed in the valve winding is much more complicated than ordinary power transformer. In order to study the electric field distribution under combined AC-DC voltage for oil paper insulation, a combined AC-DC source was constructed. The electric field distribution of oil-paper insulation model was measured by Kerr electro-optic effect, under combined AC-DC voltage with different composite ratios of DC-AC. The results indicate that: ①AC electric field distribution is symmetric. The AC field rises up with the increase of the applied AC voltage linearly. ② DC electric field distribution is non-uniform and asymmetric caused by the difference of the space charge accumulated on the oil paper interface; the electric field intensity of the oil in the right side is much stronger than that in the left side for the insulation model with two overlapping pressboard barriers inserted into a plane oil gap.

Key words： Combined AC-DC electric field Kerr effect oil-paper insulation space charge nonlinear

收稿日期: 2012-09-20 出版日期: 2014-03-25

PACS:

TM315

基金资助:国家自然科学基金(51107038), 中央高校基本科研业务书专项(12ZP06)和南方电网重点科技(SEPRI-ZL-K201015)资助项目。

作者简介: 吴昊男, 1984年生, 博士研究生, 主要从事变压器油纸绝缘特性研究。齐波男, 1980年生, 博士, 副教授, 研究方向为高压电气设备在线监测与故障诊断。

引用本文:

吴昊, 齐波, 李成榕, 赵晓林, 赵林杰, 吕金壮, 孙夏青, 赵宇明. 基于Kerr效应法的油纸复合绝缘交直流复合电场测量[J]. 电工技术学报, 2013, 28(4): 28-34. Wu Hao, Qi Bo, Li Chengrong, Zhao Xiaolin, Zhao Linjie, Lü Jingzhuang, Sun Xiaqing, Zhao Yuming. The Measurement of AC-DC Composite Field for Oil-Paper Insulation System Based on The Kerr Electro-optic Effect. Transactions of China Electrotechnical Society, 2013, 28(4): 28-34.

链接本文:

http://dgjsxb.ces-transaction.com/CN/Y2013/V28/I4/28

[1] 张燕秉, 郑劲, 汪德华, 等. 特高压直流换流变压器的研制[J]. 高电压技术, 2010, 36(1): 255- 264.
[2] 郑劲, 文闿成. 换流变压器阀侧套管出线装置绝缘分析[J]. 高电压技术, 2010, 36(5): 1184-1190.
[3] 文凯成, 王瑞珍. 换流变压器阀侧试验对绝缘考核的有效性(上)[J]. 变压器, 1997, 34(11): 10-14.
[4] 文凯成, 王瑞珍. 换流变压器阀侧试验对绝缘考核的有效性(下)[J]. 变压器, 1997, 34(12): 28-30.
[5] 王鹏. 2007年全国直流输电系统运行可靠性分析(上)[J]. 电力设备, 2008, 9(8), 84-88.
[6] 吕晓德, 陈世坤, 孙定华, 等. 各向异性非线性直流电场数值算法研究[J]. 电工技术学报, 1998, 13(4): 60-64.
[7] 陈庆国, 张杰, 高源, 等. 混合电场作用下换流变压器阀侧绕组电场分析[J]. 高电压技术, 2008, 34(3): 484-488.
[8] 李文平, 章忠国, 黎小林, 等. 直流输电用800kV换流变压器的场域分析[J]. 变压器, 2009, 46(6): 1-5.
[9] 刘刚, 李琳, 赵小军, 等. 油-纸绝缘结构非线性交直流复合电场计算的定点频域有限元法[J]. 中国电机工程学报, 2012, 32(1): 154-161.
[10] Uno Gafvert, Albert Jaksts, Christer Tornkvist, et al. Electrical Field Distribution in transformer oil [J]. IEEE Transactions on Electrical Insulation, 1992, 27(3): 647-660.
[11] 王永红, 魏新劳, 陈庆国. 极性反转电压下油纸复合绝缘的特性[J]. 中国电机工程学报, 2012, 32(19): 161-168.
[12] Uno Gäfvert, Olof Hjortstam1, Yuriy Serdyuk, et al. Modeling and measurements of electric fields in composite oil/cellulose insulation[C]. Proceedings of the Annual Report Conference on Electrical Insulation and Dielectric Phenomena (CEIDP), Kansas City, 2006: 753-756.
[13] Shimizu R, Matsuoka M, Kato K, et al. Development of Kerr electro- optic 3-d electric field measuring technique and its experimental verification[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 1996, 3(2): 191-196.
[14] Takada Tatsuo, Zhu Yongchang, Maeno Takashi. Progress in japan of electrical field measurement technology for liquid dielectrics[J]. IEEE Electrical Insulation Magazine, 1996, 12(2): 8-20.
[15] Tanaka Katsuhide, Takada Tatsuo. Measurement of the 2-dimensional electric field vector in dielectric liquids[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 1994, 4(1): 747-753.
[16] Szechtman M, Wess T, Thio C V. A benchmark model for HVDC system studies[C]. Proceedings of the International Conference on AC and DC Power Transmission, 1991. 374-378.
[17] Takashi Maeno, Yasuhide Nonaka, Takada Tatsuo. Determination of electric field distribution in oil using the Kerr-effect technique after application of dc voltage[J]. IEEE Transactions on Electrical Insulation, 1990, 25(3): 475-480.