摘要
介绍了接地网接地阻抗传统测试方法及存在的问题,提出以人造地球卫星提供的秒脉冲信号作为分流相移测量参考基准的测试方法。该方法能够准确有效地测量接地网出线构架的分流状况及接地网的真实接地阻抗。通过对某500kV超高压变电站接地网分流状况进行现场实测,修正接地阻抗值,并与传统测试方法、断开构架后接地阻抗测试结果进行对比,验证了该方法的有效性。
In this paper, the traditional testing method for grounding impedance ofgrounding grid and the existing problems were summarized. The testing method that usingthe second pulse signal provided by artificial earth satellite as the reference for shuntphase shift measurement was proposed, which could measure the shunt condition ofgrounding grid outlet frame and the true grounding impedance of grounding grid moreaccurately and effectively. The effectiveness of the method was verified through the fieldmeasurement to the distribution of grouding network in some 500 kV EHV substation,through the grounding impedance correction, and making comparison with the traditionalmethod.
作者
段长君
格日勒图
李智辉
岳永刚
林阳坡
DUAN Changjun;Geriletu;LI Zhihui;YUE Yonggang;LIN Yangpo(Inner Mongolia EHV Power Supply Bureau,Hohhot 010080,China;Xiamen Red Phase Instruments INC,Xiamen 361008,China)
出处
《内蒙古电力技术》
2018年第5期35-38,42,共5页
Inner Mongolia Electric Power
基金
内蒙古电力(集团)有限责任公司2016年第一批科技计划项目(201601076)
关键词
接地网
接地阻抗
分流相移
分流系数
架空地线
grounding grid
grounding impedance
shunt phase shift
shunt coefficient
overhead ground wire
