| 摘要 |
<p>PURPOSE:To continue normal operation even if trouble occurs in an excitation controller inner system by tripling the controller, and outputting a signal output at an intermediate time of firing command signals output from phase comparators to pulse generators. CONSTITUTION:The automatic voltage regulators 6a-6c of excitation controllers 12a-12c output phase control command signals in response to an error signal between the output voltage signal of a synchronous machine 1 and a voltage set value. On the other hand, power source phase detectors 9a-9c output phase signals theta of excitation power source. Phase comparators 7a-7c output firing command signals Xa-Xc when the signal theta coincides with the phase control command signal. Intermediate pulse selectors 13a-13c output the firing command signal input at the intermediate of the timing of the signals Xa-Xc to pulse generators 8a-8c, respectively.</p> |
