| 摘要 |
PURPOSE:To enable a stable and reliable run back operation, by providing a parallel-off run back circuit which operates upon failures in an electrical system and a stop run back circuit which operates upon failures in a fuel supply installation. CONSTITUTION:A parallel run back circuit is composed of discriminating circuits 14, 22, 23 for detecting the output conditions of power units, a selecting circuit 20 for selecting some units to be continuously operated, and a trip circuit 21 for a generator breaker. Further, the units are subjected to parallel-off upon failures in an electrical system to rapidly restrain the output of the power plant. Meanwhile a stop run back successively stops the power units upon failures in a fuel supply installation to aim at restraining the output power of the power plant. With this arrangement it is possible to carry out a stable and reliable run back operation. |
