| 摘要 |
A parallel operation controller for power converters which performs parallel operation control of a plurality of power converters having input terminals connected to a DC voltage source and output terminals connected to each other through reactors. The parallel operation controller includes: three-arm modulation control signal generating devices for generating three-arm modulation control signals each serving as a voltage command value for each phase of corresponding power converters; a voltage fixing period determining circuit which selects, on the basis of a three-arm modulation control signal from one of the three-arm modulation control signal generating devices, a phase fixing the voltage level thereof to a predetermined DC voltage level, and determines a period in which the voltage level is fixed. This parallel operation controller reduces the amount of circulating currents which flow between phases of unit inverters.
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