复杂服役工况下取向硅钢的磁特性与铁心材料选型
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摘要
本工作基于直流偏置量和励磁信号波形精确可控的软磁测量系统,研究了交直流混合激励条件下0. 20 mm、0. 23 mm、0. 27 mm及0. 30 mm规格共14个高牌号取向硅钢的磁性能及磁致伸缩性能,并考虑取向硅钢在复杂工况下的磁特性,针对受高压直流输电地中电流影响较大的交流变压器、直流偏磁与高次谐波工况同时存在的换流变压器以及含谐波工况的一般交流电力变压器开展了铁心材料选型研究。结果表明,对于正常工况下铁损相同的取向硅钢材料,厚规格、低磁感取向硅钢在直流偏磁条件下损耗及励磁电流更小,而薄规格取向硅钢在谐波工况下的损耗更低,并进一步揭示了造成该现象的原因。针对上述三类电力变压器,分别提出了不同铁损、公称厚度、磁感应强度及表面张力取向硅钢材料在铁心材料中的选用建议。
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 harmonic 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.
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 harmonic 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.
引文
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2 Li X P,Wen X S. Proceedings of the CSEE,2010,30(1),127(in Chinese).李晓萍,文习山.中国电机工程学报,2010,30(1),127.
3 Zeng R,Zhao J,Shang C,et al. High Voltage Engineering,2009,35(4),919(in Chinese).曾嵘,赵杰,尚春,等.高电压技术,2009,35(4),919.
4 Li H Z,Cui X,Liu D S,et al. Transactions of China Electrotechnical Society,2010,25(5),88(in Chinese).李泓志,崔翔,刘东升,等.电工技术学报,2010,25(5),88.
5 Wang L G,Xu D G,Miao L J,et al. Proceedings of the CSEE,2005,25(10),70(in Chinese).王立国,徐殿国,苗立杰,等.中国电机工程学报,2005,25(10),70.
6 Chen T T,Hu R,Jin Z Y,et al. Power System Technology,2015,39(10),3000(in Chinese).陈甜甜,胡蓉,金祖洋,等.电网技术,2015,39(10),3000.
7 Luo A,Fu Q,Wang L N,et al. Proceedings of the CSEE,2004,24(9),123(in Chinese).罗安,付青,王丽娜,等.中国电机工程学报,2004,24(9),123.
8 Xie N,Luo A,Ma F J,et al. Proceedings of the SCEE,2013,33(34),43 (in Chinese).谢宁,罗安,马伏军,等.中国电机工程学报,2013,33(34),43.
9 State Grid Corporation of China. Q/GDW 11481-2016 Technical requirement for sillicon steel sheet in 1 000 k V AC power transformer and reactor,China Power Press,2016(in Chinese).国家电网公司. Q/GDW 11481-2016 1 000 k V交流电力变压器和电抗器硅钢片技术条件,中国电力出版社,2016.
10 Cheng L,Yang F Y,Ma G,et al. Materials Review A:Review Papers,2014,28(6),115(in Chinese).程灵,杨富尧,马光,等.材料导报:综述篇,2014,28(6),115.
11 Zeng L S. Electric Power Construction,2004,25(12),22(in Chinese).曾连生.电力建设,2004,25(12),22.
12 Yanase S,Okazaki Y,Asano T. Journal of Magnetism and Magnetic Materials,2000,215-216,156.
13 Ma G,Cheng L,Lu L C,et al. Journal of Magnetism and Magnetic Materials,2017,426,575.
14 Lei Q F. Transformer,1989(4),2(in Chinese).雷秋芳.变压器,1989(4),2.
15 Magnetization curve former of 500 kV autotransformer at Zeng cheng s/s.Mitsubishi Electric(H. K.)LTD,1994,3,17.
16 Ban G. Journal of Magnetism and Magnetic Materials,2003,254-255,324.
17 Fujikura M,Arai S,Mogi H,et al. In:Seventh International Workshop on 1&2 Dimensional Magnetic Measurement and Testing. Berlin,2003,pp. 23.