| 摘要 |
PROBLEM TO BE SOLVED: To provide devices and methods for detecting a power swing condition in an electrical power system.SOLUTION: A method includes obtaining a voltage phasor, a current phasor and a mechanical rotor angle of a source end generator. A receiving end generator impedance and a line impedance between the source end generator and a receiving end generator are also estimated. Furthermore, a swing angle between an internal voltage of the source end generator and an internal voltage of the receiving end generator as a function of the obtained voltage phasor, the current phasor, the mechanical rotor angle and the impedances is estimated. A power swing condition is then determined based on the estimated swing angle.SELECTED DRAWING: Figure 1 |
