| 摘要 |
PURPOSE:To control the fluctuation of terminal voltage and effective electric power at the time of an accident of the system, by nullifying the function of a phase angle calculating section with the accident detecting signal, etc. CONSTITUTION:When a static head H and an output command P0 are given, a command value calculation circuit 15 works out an opening command value H0 of a governor valve and a speed command valve NO. The opening command value H0 becomes a valve opening 13 of a governor through an opening setter 14. A phase angle calculating section 16 works out the phase angle of the secondary winding based on the output P, output command value P0, speed command value NO and speed N. A setting section 17 sets out the excitation quantity of the secondary circuit based on the phase angle and the speed N. On the other hand, at an accident the phase angle control quantity is set 0 by the signal of a protective relay 29, so that the fluctuation of terminal voltage and an active power is controlled. |
