| Title |
Measurement on the permittivity and propagation velocity of used insulation oil at UHF Band using time domain reflectometry |
| Authors |
구선근(Goo, Sun-Geun) ; 주형준(Ju, Hyoung-Jun) ; 박기준(Park, Ki-Jun) ; 한기선(Han, Ki-Seon) ; 윤진열(Yoon, Jin-Yul) |
| Keywords |
Permittivity ; Used Insulation Oil ; Propagation Velocity ; Time Domain Reflectometry |
| Abstract |
We measured the permittivity and electromagnetic wave propagation velocity of used insulation oil with wide frequency range including ultra-high frequency by time domain reflectometry. The permittivity or propagation velocity is essential for locating discharge faults of oil filled power transformer. We derived 2.21 as a permittivity and 2.03×10^8 m/s as a velocity from the measurement of pulse travelling time along a coaxial line filled with used insulation oil or air. The permittivity measurement system we designed shows high measurement accuracy and the convenience for field use. |