| 摘要 |
<p>PURPOSE:To realize a maximum power generation output range with a cyclo converter of minimum capacity, by slidingly providing operation points avoiding a cyclo converter output prohibiting zone in the vicinity of a synchronous speed CONSTITUTION:When a hydraulic turbine characteristic function generator 5 produces an output which enters into the output prohibiting zone of a cycle converter 3, a history function generator 19 replaces the output with a rotational speed command which turns away the prohibiting zone. Then, a correction calculator 11 produces a correction signal so that an actual rotational speed coincides with the corrected rotational speed command. Further, a prohibiting zone kick back element 20 corrects a power generation output command when the actual rotational speed tries to enter into the prohibiting zone so that it kicks back the rotational speed to the outside of the prohibiting zone by primarily increasing or decreasing an output applied to a generator 1, i.e., a load imposed on a water turbine. With this arrangement, the capacity of the cyclo converter 3 can be set at the condition that the output prohibiting zone is provided and further a power generation output range is the same as the case wherein the output prohibiting zone is not provided.</p> |
