| 摘要 |
PROBLEM TO BE SOLVED: To suppress the occurrence of overvoltage from a system, when an accident phase is detached from the system. SOLUTION: During the operation of DC power transmission equipment 36, the exciting winding wire of a generator motor 30 is AC-excited, based on a deviation between a voltage command value V and a voltage detection value Vf by the detection of a voltage detector 34, and the output voltage of the generator motor 30 is controlled constantly. When a stop signal is outputted from the DC power transmission equipment 36 accompanying accident of a system, a voltage command value Vo is dropped by a setting level by a voltage command value converter 14, in response to a signal from a stop signal detector 16. The output voltage of the generator motor 30 is dropped according to the deviation between a dropped voltage command value V and a detection voltage Vf. Namely, the output voltage of the generator motor 30 is dropped as a preceding control, before an accident phase is detached from the system. |
