| Title |
A Transformer Protective Relaying Algorithm Using the Ratio of Induced Voltages |
| Authors |
강용철(Kang, Y.C.) ; 이병은(Lee, B.E.) |
| Keywords |
Transformer Protection ; ratio of induced voltages, ; turn ratio |
| Abstract |
This paper presents a transformer protective relaying algorithm using the ratio of induced voltages. The proposed algorithm calculates primary and secondary voltage from currents and voltages of primary and secondary windings. The ratio of primary and secondary induced voltages is equal to the turn ratio in case of the steady state and magnetic inrush. On the other hand, the ratio is different form the turn ratio in case of internal winding faults. The algorithm does not require B-H curve and can reduce the relay's operating time. |