| 摘要 |
PURPOSE:To make it possible to bring an inverter under instantaneous follow-up control, by adding a reactor-transformer current signal to a capacitor signal, and obtaining a reactor current signal. CONSTITUTION:A current signal IAF at a capacitor 14 provided near a system bus line 3 in an injection circuit and a current signal IT equivalent to a secondary current of a reactor-transformer are taken up through a CT3 and a CT4, respectively, and these current signals are added in the same level to generate a reactor current signal IR. A reactor fundamental-wave current signal I1 is subtracted from the reactor current signal IR to obtain the higher harmonic reactor current signal, which is then added to a load higher harmonic current IL from a higher harmonic source 4 and they used as a current command value IREF to control an inverter 10. Consequently, the inverter 10 is brought under instantaneous follow-up control without changing a control algorithm. |
