10 kV配网电压互感器PT铁磁谐振异常仿真模型研究  

Simulation model study of abnormal PT ferromagnetic resonance of 10 kV distribution network voltage transformer

作　　者：卢晓宇 高岳达 赵哲 LU Xiaoyu;GAO Yueda;ZHAO Zhe(Electric Energy Metering Branch of Inner Mongolia Power(Group)Co.,Ltd.,Hohhot 010000,Inner Mongolia China)

机构地区：[1]内蒙古电力(集团)有限责任公司电能计量分公司,内蒙古呼和浩特010000

出　　处：《粘接》2024年第1期185-188,共4页Adhesion

摘　　要：为了研究PT铁磁谐振所带来的影响,分析其影响因素,以10 kV低压配电网形成PT铁磁谐振过电压的基本原理为基础,利用EMTP-ATP计算机软件,构建中性点不接地系统仿真模型。以电压互感器的励磁特性、三相参数不平衡2大因素对铁磁谐振影响为例,进行仿真计算分析。仿真结果表明:PT铁磁特性较佳,可以减少谐振发生的概率,不过不能完全消除;此外,PT铁磁谐振产生较多的几率,受三相参数不平衡,或者对地电容大小不平衡等因素影响较大。基于仿真结果开展对各影响因素范围进行比较,进而为10 kV配网电压互感器PT铁磁谐振防治措施提供相关参考数据。In order to study the effect of PT ferromagnetic resonance and analyze the influencing factors,based on the basic principle of PT ferromagnetic resonance overvoltage formation in 10 kV low voltage distribution network,the simulation model of neutral point ungrounded system was established by using EMTP-ATP computer software.Taking the excitation characteristics of voltage transformer and the three-phase parameter imbalance as two major factors affecting the ferromagnetic resonance,the simulation calculation and analysis were carried out.The simulation results showed that the characteristics of ferromagnetic resonance of PT was better,which reduced the probability of resonance generation,but it could not be completely eliminated.In addition,the PT ferromagnetic resonance had a higher chance of occurrence,which was greatly affected by the three-phase parameter imbalance or the ground capacitance imbalance.Based on the simulation results,the comparison of the influence factors range was carried out,and then the relevant reference data for the prevention and control measures of 10 kV distribution network voltage transformer PT ferromagnetic resonance were provided..

关 键 词：10 kV配电网电压 互感器 PT铁磁谐振 电压仿真 

分 类 号：TM451[电气工程—电器] TP391.9[自动化与计算机技术—计算机应用技术]