| 摘要 |
A power converter comprises a series converter connected in series between an AC power source (1) and a load (6) and consisting of capacitors (30, 31), switching elements (12, 13), diodes (16, 17), etc. that function as a converter power source and a parallel converter connected parallel to the AC power source (1) and consisting of capacitors (30, 31), switching elements (10, 11), diodes (14, 15), etc. The series converter compensates for the voltage fluctuation component of the AC power source (1) to keep the supply voltage to the load (6) constant. The parallel converter compensates for the voltage fluctuation component of the capacitors (30, 31) due to the compensation operation of the series converter by means of charge/discharge operation. As a result, while suppressing the running cost with high efficiency and the voltage fluctuation of the AC power source, the load is supplied with a constant voltage.
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