| Title |
The Detection Characteristics of the Partial Discharge Pluses with Folded Dipole Type Sensors in the Oil Transformers |
| Authors |
김광화(Kim, Kwang-Hwa) ; 이상화(Yi, Sang-Hwa) ; 선종호(Sun, Jong-Ho) ; 강동식(Kang, Dong-Sik) ; 김재철(Kim, Jae-Chal) |
| Keywords |
Oil-Immersed Transformer ; Partial Discharge ; Coupler |
| Abstract |
This paper describes that the distribution of electromagnetic field occurred by PD(Partial Discharge) pulse was calculated with simulation program and characteristics of calibration and PD pulses measured with folded dipole types sensors were analyzed. As the distribution of electromagnetic field in simulation was very random the wide band measuring methods were good. Therefore three folded dipole antenna types sensors which had different their widths were designed and made. The signal according to direction and distance between sensor and pulse source in these sensor was measured and the spectrum of surface PD were acquired in the experiment of model transformer. In this result the characteristics of sensor which had middle width was better than others and the main spectrum of PD signals in surface discharge were existed in around 220MHz, 320MHz and from 450MHz to 750MHz. |