三繞組高阻抗變壓器的短路阻抗計(jì)算
陳伯根
（福州天宇電氣股份有限公司，福建 福州 350012）
摘 要：介紹了三繞組高阻抗電力變壓器的短路阻抗的計(jì)算方法、典型的繞組布置情況和不同運(yùn)行方式。給出了各種運(yùn)行方式下的等值漏磁空道面積的變化情況和計(jì)算方法，并推導(dǎo)出了漏磁通分為方向相反的兩部分時(shí)的等值漏磁空道面積計(jì)算的新方法，指出了三繞組高阻抗變壓器在極限分接運(yùn)行時(shí)的短路阻抗和額定短路阻抗的變化關(guān)系。將計(jì)算結(jié)果與試驗(yàn)值進(jìn)行比較，偏差都小于2%，說明計(jì)算公式符合工程計(jì)算要求。
關(guān)鍵詞：三繞組高阻抗變壓器；短路阻抗；等值漏磁空道面積
中圖分類號：TM426 文獻(xiàn)標(biāo)識碼：A 文章編號：1007-3175(2018)02-0027-06
Short Circuit Impedance Calculation of Three-Winding High Impedance Transformer
CHEN Bo-gen
（Fuzhou Tianyu Electric Co., Ltd, Fuzhou 350012, China）
Abstract: Introduction was made to the calculation method of short-circuit impedance, the typical winding arrangement and different operation modes of the three-winding high impedance transformer. This paper gave the change and calculation method of the equivalent magnetic flux leakage path area under various modes of operation and inferred a new method for calculating the equivalent magnetic flux leakage path area when the magnetic flux leakage was divided into two parts with opposite directions, pointing out the relationship between short-circuit impedance and the rated short-circuit impedance of the three-winding high impedance transformer during the limit tap operation. The computed result was compared with the experimental value and the deviation was less that 2%, which shows that the computational formula conforms to the requirements of engineering calculation.
Key words: three-winding high impedance transformer; short circuit impedance; equivalent magnetic flux leakage path area
參考文獻(xiàn)
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