| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress harmonics currents that flows a filter capacitor C from an AC power supply side by reducing the inductance of a reactor X<SB>2</SB>of an LCL filter, related to a power converter which is connected to an AC power supply through the LCL filter and operates in linkage with the AC power supply or with it as a power source. <P>SOLUTION: A high pass filter 6 separates harmonics currents from a grid-side detection current for an LCL filter 3. An amplifier 7 amplifies the harmonics currents from the high-pass filter and adds it for correction to a comparing part of an output current command of a power converter 2. The harmonics current flowing from the grid side to the filter is suppressed with a control circuit. <P>COPYRIGHT: (C)2004,JPO |
