摘要
变压器的抗短路能力会受到温度的影响,绕组热损耗的存在,使得变压器内部具有温度场,因此通过分析变压器的热损耗机制,证明了变压器的短路热损耗主要由负载损耗所引起。对变压器的热分布情况进行模拟,实验结果证明额定状态下,变压器中低压绕组的温度要高于高压绕组,变压器内的温度会随着时间的增加而上升,并最终达到平衡。油箱外壁温度和油速能够有效改善变压器的散热情况,外壁温度越低、油速越高,变压器短路时的最高温度就越低,从而可以根据相应条件选择来提高变压器的抗短路能力。
The short-circuit resistance of transformer will be affected by temperature.Due to the existence of winding heat loss,there is a temperature field inside the transformer.Through the analysis of the heat loss mechanism in the transformer,it is proved that the short-circuit heat loss of transformer is mainly caused by load loss.The thermal distribution of the transformer is simulated.The results show that under the rated state,the temperature of the low-voltage winding of the transformer is higher than that of the high-voltage winding,and the temperature in the transformer will rise with the increase of time and finally reach equilibrium.The lower the outer speed of the transformer and the lower the temperature of the oil tank,the more effective the anti short circuit condition of the transformer can be.
作者
王胤升
WANG Yinsheng(CHN Energy(Tianjin)Dagang Power Plant Co.,Ltd.,Tianjin 300272,China)
出处
《电工技术》
2025年第17期7-11,共5页
Electric Engineering
关键词
绕组
热损耗分析
变压器
抗短路能力
winding
heat loss analysis
transformer
short circuit resistance
