HVDC中电力变压器直流偏磁屏蔽效应研究

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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

Received: 08 October 2013 Published: 05 August 2014

PACS:

TM201.4+5

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	Articles by authors
	Zhao Zhigang
	Zhao Xinli
	Cheng Zhiguang
	Liu Fugui
	Liu Lanrong
	Wang Youhua
	Yang Qingxin

Cite this article:

Zhao Zhigang,Zhao Xinli,Cheng Zhiguang等. Research on the Shielding Effects of Power Transformer Under DC-Biased Condition in HVDC[J]. Transactions of China Electrotechnical Society, 2014, 29(7): 45-52.

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

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