Theoretical analysis of electric heating field of anisotropic layered insulating medium for high voltage power equipment and overall verification of actual outgoing device

Shiling Zhang; Wenyan Gan; Liangjun Dai

doi:10.1117/12.2653934

20 October 2022 Theoretical analysis of electric heating field of anisotropic layered insulating medium for high voltage power equipment and overall verification of actual outgoing device

Shiling Zhang, Wenyan Gan, Liangjun Dai

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Proceedings Volume 12350, 6th International Workshop on Advanced Algorithms and Control Engineering (IWAACE 2022); 123500K (2022) https://doi.org/10.1117/12.2653934
Event: 6th International Workshop on Advanced Algorithms and Control Engineering (IWAACE 2022), 2022, Qingdao, China

Abstract

In this paper, based on the discussion of the multi-layer composite insulation structure and interface in the dry glue impregnated paper sleeve, the expressions of interface charge and field strength in the double-layer composite medium are deduced by using Maxwell equation and corresponding boundary conditions. The three-layer composite medium is discussed by expanding the formula system. The theoretical calculation results show that there is interaction between three-layer composite media, and the distortion of space charge and electric field is much larger than that in double-layer composite media. Further, the allowable field strength of the outgoing line device at the tail of the converter transformer under various operating conditions is analyzed, the finite element simulation calculation model of the typical outgoing line structure is established, the transient potential and electric field distribution characteristics of the outgoing line device are discussed under various voltage types such as polarity reversal, and the insulation margin value of the critical path is obtained by combining the allowable field strength. The allowable field strength and insulation structure design of outgoing line device are proposed, which can provide reference for the design of outgoing line structure of converter transformer.

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Shiling Zhang, Wenyan Gan, and Liangjun Dai "Theoretical analysis of electric heating field of anisotropic layered insulating medium for high voltage power equipment and overall verification of actual outgoing device", Proc. SPIE 12350, 6th International Workshop on Advanced Algorithms and Control Engineering (IWAACE 2022), 123500K (20 October 2022); https://doi.org/10.1117/12.2653934

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KEYWORDS

Dielectrics

Interfaces

Composites

Transformers

Epoxies

Distortion

Maxwell's equations

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