| 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 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 and a wound-rotor induction generator 6 is detached from a transmission line 2 and operated individually, the state is detected by a signal 3S and a switch 3B2 is opened, a switch 3B1 is closed and an output from a frequency setter 130 is introduced to a voltage frequency converter 114. The frequency setter 130 is set at a value where the frequency of a voltage phase signal theta*IS as the output signal of a counter 116 is conformed approximately to the frequency of voltage on the transmission line 2 side at that time. Accordingly, the output signal, the voltage phase signal theta*IS, of the counter 116 is not equalized to frequency on the transmission line 2 side, but it is brought to a voltage phase signal having the fixed frequency of a value close to the frequency.</p> |
