| 摘要 |
<p>PURPOSE:To supply station load with stable power even at the time of individual operation by converting currents fed to the secondary side of a wound-rotor induction generator into currents, frequency of which is regulated by an error signal between the output signal of a voltage phase detector and the output signal of a rotor phase detector, magnitude of which is regulated by a current command signal. CONSTITUTION:When a circuit breaker 3 is opened, current signals 233, 234 are introduced to a current control circuit 400 because a changeover switch 3A1 is closed and 3A2 is opened. The currents 401, 402, 403 of a frequency converter 7 are converted into the signals of vector values and collated to current command signals 444, 446 in the current control circuit 400. The secondary side of a wound-rotor type induction generator 6 is supplied with currents, frequency of which is regulated and magnitude of which is regulated by the signals 444, 446, by a frequency converter 7 by the action of the current control circuit 400. Accordingly, even when the speed of a hydraulic turbine is changed and the number of revolution of the generator is varied, the primary frequency of the generator can be controlled at a value equal to the frequency of a transmission line at all times.</p> |
