| Title |
Performance Verification and Improvement of UHF Sensor for the Increasement of the Partial Discharge Detection Reliability |
| Authors |
김원규(Kim, Won-Gyu) ; 김민수(Kim, Min-Soo) ; 백영식(Baek, Young-Sik) |
| DOI |
https://doi.org/10.5370/KIEE.2014.63.10.1461 |
| Keywords |
GIS(Gas Insulated Switchgear) ; Fat-dipole patch ; PD(Partial Discharge) ; UHF sensor |
| Abstract |
GIS(Gas Insulated Switchgear) is important power apparatus which have strong dielectric strength, supply electric power and is a part of the power system. Most substation type is configured as GIS. Recently, because of continuous increasement of GIS demand resulted from high quality & big capacity of electric power, the necessity of the preventive & diagnosis system is being expanded gradually. GIS partial discharge occurred on the UHF band is detected effectively by the method to IEC 60270 that recommend to be able to detect the apparent minimum discharge, 5 pC. Additionally, the UHF sensor should be installed to detect PD signal if Partial discharge signal, 5 pC occur in every part of GIS. Currently PD diagnosis system applying UHF sensor for GIS with various voltage level like 154 kV, 345 kV, 765 kV have been operated. And it is necessary to measure and analyze insulation breakdown phenomenon of inside GIS exactly. In this paper, we proposed Fat-dipole patch UHF sensor that is developed and more sensitive, excellent wide-range characteristic than the exising UHF sensor. And we performed KERI (Korea Electrotechnology Research Institute) reference test, which showed the excellent result for the all tests. |