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大容量變壓器油箱屏蔽結(jié)構(gòu)對雜散損耗影響的研究

來源:電工電氣發(fā)布時間:2025-04-27 10:27瀏覽次數(shù):5

大容量變壓器油箱屏蔽結(jié)構(gòu)對雜散損耗影響的研究

佘炎松1,2,王建民2,趙峰2,劉玉芝1,杜振斌2,劉濤2
(1 石家莊鐵道大學(xué) 電氣與電子工程學(xué)院,河北 石家莊 050043;
2 保定天威保變電氣股份有限公司 河北省輸變電裝備電磁與結(jié)構(gòu)性能重點實驗室,河北 保定 071056)
 
    摘 要:為了降低大容量變壓器結(jié)構(gòu)件雜散損耗和預(yù)防局部過熱,針對大容量油浸式變壓器高壓側(cè)油箱中部出線結(jié)構(gòu)特點,建立了合理的三維有限元仿真模型,分別計算和分析了油箱采用銅屏蔽、豎向磁屏蔽與橫向磁屏蔽三種結(jié)構(gòu)對其漏磁場及結(jié)構(gòu)件雜散損耗的影響。對比分析結(jié)果表明:當(dāng)采用橫向磁屏蔽結(jié)構(gòu)時,各結(jié)構(gòu)件上的漏磁分布與損耗分布得到了明顯改善,不僅雜散損耗較采用銅屏蔽與豎向磁屏蔽結(jié)構(gòu)時分別減小了23.2% 和32.5%,而且降低了因漏磁集中而可能出現(xiàn)的結(jié)構(gòu)件局部過熱風(fēng)險,為大容量變壓器降低結(jié)構(gòu)件雜散損耗和預(yù)防局部過熱提供了一種較優(yōu)的油箱屏蔽結(jié)構(gòu)與參考結(jié)論。
    關(guān)鍵詞: 大容量變壓器;屏蔽結(jié)構(gòu);漏磁場;雜散損耗;局部過熱
    中圖分類號:TM411     文獻標(biāo)識碼:B     文章編號:1007-3175(2025)04-0064-06
 
Research on the Influence of Shielding Structure of Large-Capacity
Transformer Tank on Stray Loss
 
SHE Yan-song1,2, WANG Jian-min2, ZHAO Feng2, LIU Yu-zhi1, DU Zhen-bin2, LIU Tao2
(1 School of Electrical and Electronic Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China;
2 Hebei Province Key Laboratory of Electromagnetic and Structural Performance of Power Transmission and Transformation Equipment,
Baoding Tianwei Baobian Electric Co., Ltd, Baoding 071056, China)
 
    Abstract: In order to reduce the stray loss of structural parts and prevent local overheat for the large-capacity transformer, according to the characteristics of middle outlet structure of the high-voltage side for large-capacity oil-immersed transformer, this paper established a reasonable three-dimensional finite element simulation model, and calculated and analyzed the influence of three shielding structures of oil tank on the leakage magnetic field and stray loss of the structural parts by using copper shielding, vertical magnetic shielding and horizontal magnetic shielding respectively. The results of comparative analysis show that the leakage magnetic distribution and loss distribution on each structural part are significantly improved when the horizontal magnetic shielding structure is adopted, not only the stray loss is reduced by 23.2% and 32.5% respectively compared with the copper shielding and vertical magnetic shielding structure, but also the risk of local overheat of structural parts that may occur due to the concentration of leakage magnetic flux is reduced. It provides a better tank shielding structure and reference conclusion for large-capacity transformers to reduce stray loss of structural components and prevent local overheating.
    Key words: large-capacity transformer; shielding structure; leakage magnetic field; stray loss; local overheat
 
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