| 摘要 |
PURPOSE:To prevent a reverse power flow by decreasing a generating power so as to come smaller than a load power through rotating a governor motor rapidly in the direction of reducing an output power when a part or the whole of a load decreases extremely and a received power becomes of a value smaller than a preset one. CONSTITUTION:A control device 17 gives pulse signals for switching control to respective contacts 13, 14 according to the output of a power sensor 6. When the output from the power sensor 6 is a predetermined value, the control device 17 outputs the output signal whose pulse width brings a small time interval for current application. But, when the output from the power sensor 6 comes smaller than the predetermined value, the control device 17 gives the output signal whose pulse width brings an increased time interval for current application to the contact 14. Then, a governor 3 is controlled by decelerating a motor 12 rapidly and the output power PC of a generator 1 is so controlled as to come smaller than a received power PL, by decelerating a prime mover 2. Thereby, there occurs no reverse power flow and apparatuses for supplying power are protected very suitably. |
