HVDC中电力变压器直流偏磁屏蔽效应研究

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摘要为了研究高压直流输电系统（HVDC）中电力变压器发生直流偏磁状况时,由导磁钢板和取向硅钢片组成的屏蔽构件在漏磁场激励下的电磁性能,本文提出并建立了基于漏磁补偿的实验模型进行了详细地实验研究和仿真分析。重点考察不同直流偏磁激励下变压器磁屏蔽结构中的杂散损耗和磁通分布,研究交流激励源和直流激励源之间的交叉作用对屏蔽构件损耗特性的影响。通过详细的模型实验分别获得了电力变压器磁屏蔽构件在标准的正弦激励作用和不同直流偏置磁场强度作用时的损耗和磁通分布情况并进行了对比分析。提出采用等效均匀化磁导率、电导率处理方法计算电力变压器磁屏蔽构件杂散损耗的工程实用措施。不同直流偏磁激励条件下模型杂散损耗的计算结果和测量结果具有较好的一致性,所得结果和结论有助于通过优化设计来提高电力变压器磁屏蔽的性能指标。

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	赵志刚
	赵新丽
	程志光
	刘福贵
	刘兰荣
	汪友华
	杨庆新

关键词 ：电力变压器, 直流偏磁, 取向硅钢片, 各向异性, 损耗, 磁通

Abstract：In order to study the electromagnetic properties of the transformer shielding structural parts under various DC biased conditions, which are made of the magnetic steel plate and the grain- oriented silicon steel, a test model with compensator of leakage flux is proposed in this paper. The distribution of iron loss and magnetic flux are investigated in detail based on the test model. The different electromagnetic behaviors of the shielding shunts under the interaction between the AC exciting source and the DC exciting source is also examined. The stray loss and flux of different typed shunts are obtained experimentally and the comparison between the measured and calculated results is carried out. A practical engineering-oriented approach is proposed to solve the stray loss problems using homogenization processing method. All the calculated and measured results of the iron loss and magnetic flux for different magnetic shunts are practically in good agreement. These have important significance in improving the performance of magnetic shielding by optimizing design.

Key words： Power transformer DC bias grain-oriented silicon steel anisotropy iron loss magnetic flux

收稿日期: 2013-10-08 出版日期: 2014-08-05

PACS:

TM201.4+5

基金资助:国家自然科学基金(51237005/51107026/27/38)、中国博士后科学基金(2013M530866)、河北省自然科学基金(E2013202130)、河北省高等学校科学技术研究基金(Q2012094)和国家电网科技资助项目

作者简介: 赵志刚男,1981年生,博士研究生,副教授,研究方向为工程电磁场分析及磁性材料模拟与应用。程志光男,1942年生,教授级高级工程师,研究方向为工程电磁场分析、磁性材料模拟与工业应用。

引用本文:

赵志刚, 赵新丽, 程志光, 刘福贵, 刘兰荣, 汪友华, 杨庆新. HVDC中电力变压器直流偏磁屏蔽效应研究[J]. 电工技术学报, 2014, 29(7): 45-52. Zhao Zhigang, Zhao Xinli, Cheng Zhiguang, Liu Fugui, Liu Lanrong, Wang Youhua, Yang Qingxin. Research on the Shielding Effects of Power Transformer Under DC-Biased Condition in HVDC. Transactions of China Electrotechnical Society, 2014, 29(7): 45-52.

链接本文:

http://dgjsxb.ces-transaction.com/CN/Y2014/V29/I7/45

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