周戴明,王志亮,李康毅
ZHOU Daiming,WANG Zhiliang,LI Kangyi

• 1:国网浙江省电力公司绍兴供电公司

摘要(Abstract)：

为了抑制铁磁谐振,小电流接地系统中电压互感器通常采用4TV接线方式,但由于此接线方式较为复杂,极易出现接线错误,尤其是当零序TV二次绕组极性接反时,会给现场运行检修人员分析故障带来困难,甚至会造成误判。调研了4TV接线方式在绍兴地区的应用现状后,提出了一种"理论分析+实验设计"的极性判别方法,深入分析了4TV接线在系统发生单相接地故障时各点电压的变化情况,通过试验设计并模拟故障得到试验数据,并通过理论数据和试验数据的比对验证了该试验设计的合理性,为判别4TV接线方式是否正确提供了一种有效的检验方法。
In order to suppress ferromagnetic resonance, 4TV connection mode is usually adopted in voltage transformer of small current grounding system. However, the connection mode is complex and is prone to wrong wiring; especially when secondary winding polarities of zero-sequence TV are reversely connected, it may bring difficulties to filed operation and maintenance personnel in fault analysis or even wrong judgment. After investigating present application of 4TV wiring mode in Shaoxing, the paper puts forward a polarity determination method of "theoretical analysis+experimental design" and deeply analyzes the voltage changes of 4TV wiring when single-phase grounding fault occurs in the system. Through the experimental design and fault simulation, test data is obtained; through comparison between theoretical data and test data, rationality of the experiment design is validated, which provides an effective method to determine correctness of 4TV wiring mode.

关键词(KeyWords)： 小电流接地系统;电压互感器;接线极性判别;故障分析;试验方法
small current grounding system;voltage transformer;wiring polarity determination;fault analysis;test method

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 周戴明,王志亮,李康毅
ZHOU Daiming,WANG Zhiliang,LI Kangyi

DOI: 10.19585/j.zjdl.2016.01.007

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