接地网接地阻抗异频测试装置研制  

Development of Grounding Grid Grounding Resistance Testing Equipment Based on Different Power Frequency

作　　者：阮启运[1] 陆佳政[2] 张红先[2] 方针[2] 李波[2] 

机构地区：[1]华北电力大学电气与电子工程学院,河北保定071003 [2]湖南省电力试验研究院国家电网公司输电线路防灾技术实验室,湖南长沙410007

出　　处：《华北电力技术》2010年第7期31-34,54,共5页North China Electric Power

摘　　要：工频法测试接地网接地阻抗容易受到信号干扰作用,且工频测试中劳动强度大。本文研制了一种异频接地网接地阻抗测试装置,该装置采用了多传感器切换、触摸屏技术、滤波电路技术和高精度的AD采样技术,实现了对外界信号干扰的有效控制。同时该装置重量轻,便捷性强,极大减小了测量过程中试验人员的劳动强度。在220 kV楠竹塘变电站接地网接地阻抗测试中,装置测试结果与其他装置一致性良好,测试结果还显示异频法测试的接地阻抗值较工频法的大。Hard labor and signal interfering are disadvantages in grounding resistance testing with power frequency method. A different power frequency grounding resistance testing equipment is developed, which uses multiple sensors switching, touch screen, filtering circuit and high precision A/D collection, which also achieves to control interferential singal outside effectively. And this equipment is light enough to take conveniently,which reduces experimenter＇s labor intension in the test. The result of this equipment is consistent with other equipment in grounding resistance testing of 220 kV Nanzhutang power station. And testing result shows that the value of different power frequency testing is bigger than those of power frequency testing.

关 键 词：接地网 接地阻抗 异频 测试 装置 

分 类 号：TM727[电气工程—电力系统及自动化]