受工艺孔影响的变压器铁心损耗计算与分析

doi:10.19595/j.cnki.1000-6753.tces.210123

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Abstract The loss and local temperature of the transformer core will be increased due to the presence of technological stacking holes, and even the performance of the transformer will be deteriorated. To study the influence of technological holes on transformer core loss and performance, the alternating magnetic properties of silicon steel materials are measured and the two-dimensional magnetic field of the holed core model is analyzed based on the Steinmetz formula. The theoretical calculation method of core loss caused by the hole with different shapes and sizes is proposed. Based on the finite element method, the two-dimensional transient magnetic field simulations of the grain-oriented steel sheets commonly used in transformer core are carried out, and the influence of technological holes with different types on transformer core loss is compared and analyzed. The magnetic properties testing system for silicon steel samples with the holes is established. The core loss and local temperature rise caused by the holes are quantitatively measured to verify the theoretical calculation method. The simulation and experimental results show that the calculation method of the core loss rise caused by the technological holes has high accuracy and engineering applicability.

Key words： Dry-type transformer technological stacking hole core loss

Received: 22 January 2021

PACS:

TM412

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	Articles by authors
	Dou Runtian
	Li Yongjian
	Zhang Xian
	Yang Ming
	Chen Ruiying

Cite this article:

Dou Runtian,Li Yongjian,Zhang Xian等. Calculation and Analysis of Transformer Core Loss Due to Technological Hole[J]. Transactions of China Electrotechnical Society, 2022, 37(12): 2909-2923.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.210123 OR https://dgjsxb.ces-transaction.com/EN/Y2022/V37/I12/2909

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