NDLI: Research on transient electric field distribution of converter transformer valve side winding under polarity reversal

Content Provider	IEEE Xplore Digital Library
Author	Zhang Liang-xian Zhang Qi-min Chen Mo-sheng Peng Zong-ren
Copyright Year	2013
Description	Author affiliation: Xi'an XD Transformer Co., Ltd., Xi'an, China (Zhang Qi-min) \|\| State Key Lab. of Electr. Insulation & Power Equip., Xi'an Jiaotong Univ., Xi'an, China (Zhang Liang-xian; Chen Mo-sheng; Peng Zong-ren)
Abstract	Converter transformer is the most important equipment in DC transmission system. Polarity reversal is a special working condition of converter transformer in service, and the polarity reversal test is also generally regarded as the most important experiment for converter transformer. In the calculation of the polarity reversal field, the permittivity and conductivity of the each dielectric material should be given. The insulation materials of converter transformer are oil and pressboard. The resistivity of pressboard is anisotropic, there is a great difference value between the directions of through and along the paper layer. Different polarity reversal durations have different experiment results during polarity reversal test process. In this paper, the electric field distribution of converter transformer valve side winding in a practical ±800 converter transformer under polarity reversal test voltage was calculated with field-circuit coupling method. The anisotropism of paperboard resistivity was taken into account during the calculation process. In order to analyse the influence of polarity reversal duration to the distribution of electric field, several different polarity reversal durations were set to contrast. The results of this paper could provide references for the research and design of converter transformer.
Sponsorship	IEEE Dielectr. Electr. Insul. Soc.
Starting Page	307
Ending Page	310
File Size	784398
Page Count	4
File Format	PDF
ISBN	9781479925971
DOI	10.1109/CEIDP.2013.6747085
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-10-20
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Power transformer insulation Oil insulation Electric fields Windings Valves Materials Anisotropic Characteristics Converter Transformer Polarity Reversal Field-circuit Coupling Interface Charges
Content Type	Text
Resource Type	Article

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