| 摘要 |
<p>In the power control of a set (2), consisting of a turbine (4) and a generator (3) coupled to the electric grid, a power regulator (12) and a speed controller (10) are applied. The latter becomes effective when the grid receives insufficient power. In order to safeguard a sufficient power supply after a grid defect and during output fluctuations, the power regulator is connected by a switch (1) also at a reactive power application. In this manner, the power regulator is set out of operation only for relatively short intermedicate period so that the setting valve (5) of the turbine is run at an almost full output value. The setting valve is connected behind the turbine. The speed controller and the power regulator are connected in front of the same via a comparison element. The switch between the latter and the power regulator is held in the make position by a limit value detector, while its OFF position depends on a power measuring apparatus (17). Behind the latter is connected a second limit value detector (30), turned to the reactive power, the two detectors being coupled to the switch via an OR-element.</p> |
