| 摘要 |
PURPOSE:To make it possible to control an inverter by indirectly determining the current signal of reactor required for the control when a capacitor and a reactor transformer, i.e., a combination of a reactor and a linkage transformer, are employed in the injection of compensation current into a system bus from an inverter constituting an active filter. CONSTITUTION:An injection circuit comprising a capacitor C1 and a reactor transformer 20 connected with a system bus and feeding compensation harmonic current produced from an inverter 10 is provided, on the secondary of the reactor transformer 20, with a simulation reactor 21 in parallel therewith. Current flowing through the simulation reactor 21 is detected as a current signal through a CT and delivered to an amplitude regulating circuit 22 in order to determine a reactor current signal corresponding to the reactor transformer current. |
