摘要
核相技术是电力系统检修与运行过程中必不可少的环节。现有核相方法操作复杂,并且存在安全风险,难以适应新型电力系统的发展要求。提出一种同步电场感应技术的线路核相方法,采用两个单轴电场传感器阵列分别放置在两条待核相的架空线路下方,由同步驱动系统驱动传感器阵列同时测量电场,计算相角特征量即可实现相序的判断,再通过对比两个电场传感器的相位角,即可完成相位操作。基于有限元仿真构建了架空线核相的电场模型,定量分析了架空线偏移、传感器位置偏移以及干扰电场对所提方法的影响。最后,搭建了架空线的实验平台,验证了所提方法的有效性。
The phase detection technology is an essential link in the maintenance and operation process of power systems.The existing phase detection methods are complex in operation and pose safety risks,making it difficult to adapt to the development requirements of new power systems.This article proposes a non-contact phase measurement based method for detecting the phase of overhead lines.Two single axis electric field sensor arrays are placed below the two overhead lines,and the sensors are driven by a synchronous drive system to simultaneously measure the electric field,and the phase sequence can be determined by calculating the phase feature values.By comparing the phase angles of the two electric field sensors,the phase evaluation can be completed.Based on finite element simulation,an electric field model of the core phase of the overhead line was constructed,and the effects of overhead line offset,sensor position offset,and interference electric field on the proposed method were studied.Finally,an experimental platform for overhead lines was built to verify the effectiveness of the proposed method.
作者
叶杰
项宇锴
李思雨
吴勇海
黄雁
揭璐琦
YE Jie;XIANG Yu-kai;LI Si-yu;WU Yong-hai;HUANG Yan;JIE Lu-qi(State Grid Longyan Electric Power Supply Company,Longyan,364000,China)
出处
《电气开关》
2025年第3期25-30,共6页
Electric Switchgear
基金
国网福建省电力有限公司科技项目资助,群众创新项目(52136023000D)。
关键词
核相
非接触
相序
有限元电场
phase detection method
contactless measurement
phase sequence
finite element electric field
