| 摘要 |
<P>PROBLEM TO BE SOLVED: To enable in-station isolated operation to continue by suppressing the amount of generated overvoltage caused by a control overshoot after removal of an accident in a power generation plant that migrates to the in-station isolated operation due to the external accident such as a transmission system. <P>SOLUTION: The invention is characterized in that when the power generator is in normal operation, the power generator output voltage is monitored by an instrument transformer placed on the output side of the power generator, and a thyristor is controlled so that the output voltage of the power generator is a prescribed voltage value, and when an electric accident occurs in a transmission system or switchyard, a power generator voltage control device switches to control making a field winding of the power generator generate a no-load field voltage based on an accident detection signal of a protector detecting the accident. The invention enables the in-station isolated operation to continue by suppressing the amount of generated overvoltage caused by a control overshoot after removal of the accident in a power generation plant that migrates to the in-station isolated operation due to the external accident such as the transmission system. <P>COPYRIGHT: (C)2012,JPO&INPIT |
