摘要
绕组热点温度是配电变压器在线监测的重要指标,而现有的绕组温升在线计算方法未考虑箔式绕组结构产生的影响。通过配电变压器不同谐波下等效电阻比值对箔式绕组结构进行辨识,然后对比线绕式和箔式两种绕组结构发热差异,对一种通过绕组电阻变化计算绕组温升的算法进行了在线修正。该方法提供了一种通过谐波电阻比值预测箔式绕组热点温度的新思路。
Hot-spot temperature of winding is an important indicator for on-line monitoring of distribution transformers.However,the existing on-line calculation methods for winding temperature rise do not consider the influence of foil winding structure.The structure of foil winding is identified by equivalent resistance ratio of distribution transformer under different harmonics,and comparing the heating difference between the wire winding structure and the foil winding structure,an algorithm for calculating the winding temperature rise through changes in winding resistance was online corrected.This method provides a new idea for predicting the hot-spot temperature of foil winding through the ratio of harmonic resistance.
作者
弓子钧
张博
董婷
GONG Zijun;ZHANG Bo;DONG Ting(School of Electrical Engineering,Shenyang University of Technology,Shenyang 110870,China)
出处
《电机与控制应用》
2023年第8期18-25,共8页
Electric machines & control application
基金
国家自然科学基金项目(52207064)。
关键词
配电变压器
在线监测
热点温度
绕组结构辨识
谐波电阻
distribution transformer
on-line monitoring
hot-spot temperature
winding structure identification
harmonic resistance
