电测与仪表2018，Vol.55Issue(6)：52-58,7.
谐波电流扰动下配电变压器损耗计算与绝缘寿命损失评估
Calculation distribution transformer loss and insulation life assessment under harmonic currents disturbance
周卫华 1万代 1叶会生 1齐飞 1陈小容 2赵莉华3
作者信息
- 1. 国网湖南省电力公司电力科学研究院,长沙410007
- 2. 湖南省湘电试验研究院有限公司,长沙410007
- 3. 四川大学电气信息学院,成都610065
- 折叠
摘要
Abstract
The harmonic current will cause the loss of the distribution transformer,the acceleration of the thermal aging and the decrease of the insulation life.A method for calculating transformer no-load loss under harmonic current disturbance is proposed in this paper.The distribution transformers of Yyn0 and Dynl 1 connection of the stray loss in harmonic current disturbance have been analyzed.So the calculation method of transformer load loss based on harmonic loss factor is improved,.and hot spot temperature calculation model is corrected.The calculation method of relative aging factor of insulating paper in IEEE C57.91 was modified by using 6 ℃ criterion,the reference value of transformer hot spot temperature at 98 ℃.The results of calculation and experiment show that the transformer loss increases with the increase of the harmonic current distortion rate,so the life loss of transformer insulation system is shortened,and the service life of transformer is shortened.关键词
谐波电流/空载损耗/热点温度/寿命损失Key words
harmonic current/no-load loss/hot spot temperature/life loss分类
信息技术与安全科学引用本文复制引用
周卫华,万代,叶会生,齐飞,陈小容,赵莉华..谐波电流扰动下配电变压器损耗计算与绝缘寿命损失评估[J].电测与仪表,2018,55(6):52-58,7.
