| 摘要 |
PROBLEM TO BE SOLVED: To operate a plant safely and promptly by controlling the voltage drop of a unit bus caused by a rush current flowing through a group of auxiliary machinery during the shift to individual operation. SOLUTION: This method supplies the output power from a generator 1 to a transmission system 2 and a unit bus 10 connected to unit auxiliary machinery 14, usually receives power supply from the transmission system 2, and supplies in the event of an accident in the transmission system 2, the power to a plurality of auxiliary machinery 15 connected to a common bus 11, by connecting the unit bus 10 to the common bus 11 to be separated from the transmission system by turning on a breaker 12 for communicating with the bus for attaining in-plant individual operation. In shifting to the individual operation by an accident in the transmission system 2, the output voltage of the generator 1 is controlled by an automatic voltage regulator(AVR) 17, so as to be increased to a preset voltage, making it possible to suppress the voltage drop of the unit bus 10.
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