| Title |
Diagnosis of Fault and Abnormal Conditions in a Single-Phase Transformer Using S-parameter Measurement |
| Authors |
김정은(Jeongeun Kim) ; 김광호(Kwangho Kim) ; 나완수(Wansoo Nah) |
| DOI |
http://doi.org/10.5370/KIEE.2018.67.10.1344 |
| Keywords |
Fault diagnosis ; Single-Phase transformer ; S-parameter ; VNA |
| Abstract |
In this paper, we propose a two-port S-parameter data to diagnose the fault conditions of a single-phase transformer. Using the S-parameters we can measure the reflection and transmission characteristics of signal power at the port of a transformer, which can also be converted into ABCD parameters and Z parameters through a well-known conversion formulas. Transformer fault diagnoses can be performed based on the intuitive and qualitative/quantitative characteristics of the these parameters. In addition, we can obtain wide frequency characteristics at the primary and secondary sides of the transformer, which can be used to get time domain responses using the inverse Fourier transformation with some specific input waveform. In order to verify the effectiveness of the proposed method, the fault conditions were analyzed in simulation and experiment for 3 kVA single phase transformer with 15: 5 turns ratio, and the validity of the proposed method was verified. |