| 摘要 |
PURPOSE:To conduct a safe power factor improvement by selecting and closing phase-advancing capacitors so that the capacitors are within the possible output range of a private power generator according to the result of detection of whether the operating state of a commercial power supply and private power generator is a parallel operation or individual operation of any one of them and whether the point of measurement of a power factor is a receiving point or the output point of the private power generator. CONSTITUTION:The parallel operation of a commercial power supply 3 and private power generator 1 or the individual operation of any one of them is conducted by circuit breakers 2 and 6 and switch 5. With a bus L, a power load 7 composed of a plurality of power loads #l-#n and a phase-advance capacitor group 8 composed of a plurality of phase-advance capacitors are connected via the switch, respectively. The automatic controller 10 of the phase-advance capacitors automatically selects and closes the phase-advance capacitors to improve a power factor so that the capacitors are within the possible output range of the private power generator according to various data such as whether an operating state is 'the parallel operation of the commercial power supply 3 and private power generator 1 or the individual operation of any one of them, whether the point of measurement of a power factor is a receiving point or the output point of the private power generator and whether the load is high or low. Thus, the power factor is improved safely and power rates are reduced. |
