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变压器三侧同时达到满负荷运行时的温升分析
引用本文:郑万长. 变压器三侧同时达到满负荷运行时的温升分析[J]. 电力设备, 2008, 9(3): 69-71
作者姓名:郑万长
作者单位:合肥ABB变压器有限公司,安徽省,合肥市,230022
摘    要:变压器三侧同时达到满负荷时的总负荷损耗比常规双绕组组合的最大损耗值要高出63.9%(以额定容量为180/180/90MV·A的三绕组自耦变压器为例)。如果变压器设计者在设计中未考虑这一运行情况,则变压器的温升超标就会很严重。文章对变压器三侧同时达到满负荷运行时的负荷特性、温升及试验折算进行了分析,并结合为无锡电力公司生产的考虑了变压器三侧同时达到满负荷运行状况的一台实际变压器的有关温升参数(如预层油温升、绕组温升、油平均温升的限值、绕组最热点温升)的设计值与常规仅考虑双绕组组合时的温升参数值进行了对比分析。分析表明,若在变压器设计中未考虑变压器三侧同时达到满负荷运行状况,则实际温升远远超过标准给定的限值范围。

关 键 词:电力系统  变压器  三侧满负荷  运行  温升
收稿时间:2007-07-30
修稿时间:2007-07-30

Temperature Rise Analysis Based on Full Load at Three Sides of Transformer
ZHENG Wan-chang. Temperature Rise Analysis Based on Full Load at Three Sides of Transformer[J]. Electrical Equipment, 2008, 9(3): 69-71
Authors:ZHENG Wan-chang
Affiliation:ZHENG Wan-chang (ABB Hefei Transformer Company Ltd., Hefei 230022, China)
Abstract:The total on-load loss of full load at three sides of transformer is 63.9% more than the maximum loss of normal two-winding combination(taking three-winding auto transformer as an example,which rated power is 180 MVA/180 MVA/90 MVA).But if the designer ignores the situation,the result of over-heat of transformer is very seriously dangerous.The paper analyzes the loading feature,temperature rise and test conversion when three sides of the transformer on full load simultaneously,combined with the temperature rise parameters(such as temperature rise of top oil,winding and average temperature rise of oil and the temperature rise on hottest point of winding)of a transformer for Wuxi Power Company which three sides on full load simultaneously,the difference between the total loss when three sides on full load and the total loss of normal two-winding combination is analyzed.The result shows that the actual temperature rise will much over the standard limit when the transformer is in operation with three sides on full load.
Keywords:power system  transformer  full load at three sides  operation  temperature rise
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