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UHF Partial Discharge Measurement Technology using a Dual Bands Methods to have the Frequency Characteristics in GIS  

Yi, Sang-Hwa (한국전기연구원)
Sun, Jong-Ho (한국전기연구원)
Kang, Dong-Sik (한국전기연구원)
Kim, Kwang-Hwa (한국전기연구원)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers C / v.55, no.3, 2006 , pp. 127-133 More about this Journal
Abstract
This Paper describes a dual bands PD measurement method which has two different bandwidths. The one bandwidth is 0.5 - 2 GHz and the other is 1 - 2GHz. This method is used for GIS diagnosis. In the experiment, it shows that the ratios between two PD quantities in dual bands depend on the defect types and gas pressures. The variations of ratios in different pressures are more sensitive than ones in defect types. And These ratios increase with increasing SF6 gas pressures. As these ratios give us additive information of PD we can analyze the defect type as well as risk assessment for the GIS reliably. Therefore the above result shows that these ratios are one of parameters for diagnosing GIS.
Keywords
Partial Discharge; GIS; UHF; Defect;
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