| 摘要 |
PROBLEM TO BE SOLVED: To provide a power factor control device and its method which enable power factor control, keeping the balance of power factors and voltages, when system non-interconnection parallel operation by the use of generators of different specifications and capacities is carried out. SOLUTION: This control device is fitted with a target power factor setting means (9a) for setting at constant periods each range of power factors which a plurality of generators (1a-1d) aim at, a comparison means (9a) for comparing the voltage of a bus-bar (10) with a specified voltage value range at the constant periods, a first control means (9a) which performs control, so as to lower the voltage of at least one generator of the lowest power factor, when it is found by the result of this comparison means that the voltage of the bus-bar is higher than the voltage value range, and to raise the voltage of at least one generator of the highest power factor, when the voltage of the bus-bar is lower than the voltage value range, and a second control means (9a) which controls the power factor of a generator being out of the power factor range so as to correct the power factor of the generator into the power factor range, when the voltage of the bus-bar lies within the voltage value range. |
