| 摘要 |
PROBLEM TO BE SOLVED: To solve such a problem in which it is difficult to assess a remaining life when a load is small and a capacitor has a small internal resistance.SOLUTION: A cell for measurement is arranged at an arbitrary position of an arbitrary capacitor module in a capacitor bank. A DC power source which outputs a DC voltage different from a DC supply voltage applied to the capacitor bank is connected to the cell for measurement. A resistance for charging, a selector switch and a resistance for discharging are connected between the DC power source and cell for measurement. The selector switch is switched by a control circuit. The cell for measurement is so switched that the DC power source is on the side of the cell for measurement normally or in charging and that energy stored in the cell for measurement is discharged through the resistance for discharging in remaining life assessment or momentary voltage compensation.SELECTED DRAWING: Figure 1 |
