METALS AND METAL MATRIX COMPOSITES |
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Magnetic Performance of Grain-oriented Silicon Steel Under Complex Working Condition and Material Selection for Transformer Core |
CHENG Ling1,2, YANG Fuyao2, MA Guang2, MENG Li1, CHEN Xin2, HAN Yu2, DONG Han1
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1 Department of Metallurgical Technology, Central Iron and Steel Research Institute, Beijing 100081; 2 State Key Laboratory of Advanced Power Transmission Technology, Global Energy Interconnection Research Institute Co., Ltd., Beijing 102211 |
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Abstract Based on the soft magnetic measurement system which can precisely control the DC bias and excitation signal waveform, the magnetic performance and magnetostrictive properties of 0.20 mm, 0.23 mm, 0.27 mm and 0.30 mm series grain-oriented silicon steels were studied under AC/DC hybrid excitation. The selection principles of core materials for 3 different types of transformers (AC transformer affected by neutral current in HVDC ground-return system, converter transformer with DC bias and harmonics condition, and lager AC transformer with harmonic condition) were researched in this work. For the samples with the same core loss under normal condition, the thick silicon steel with low magnetic induction shows lower power loss and excitation current under DC bias condition, while the thin silicon steel presents lower core loss under harmo-nic condition. Besides, the mechanisms were analyzed. The selection proposals of silicon steels with different core loss, thickness, magnetic induction and tensile stress for the above 3 types of power transformers were put forward respectively.
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Published: 19 June 2019
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Fund:This work was financially supported by the National Key Research and Development Plan (2017YFB0903901). |
About author:: Ling Chengreceived his B.E. degree and M.S. degree in materials science and engineering from University of Science and Technology Beijing in Sep. 2006—Jan. 2013. He is currently working at Global Energy Interconnection Research Institute (GEIRI) and pur-suing his Ph.D. degree in Central Iron and Steel Research Institute, Beijing, China. As the first author he has published more than 10 papers in domestic and fo-reign periodicals, include Scripta Materialia, Journal of Magnetism and Magnetic Materials, Electric Power, and so on. He has applied 12 national invention patents and 6 of them were authorized. In addition, he won the first class reward of scientific and technological progress awarded by the China Corrosion and Protection Association and the second class reward of scientific and technological progress awarded by the GEIRI. He is working on the development and application of magnetic materials in power grid. |
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