| 摘要 |
PROBLEM TO BE SOLVED: To provide a power conversion device which precisely calculates the magnetic flux of the iron core of a transformer and can suppress the DC- biased magnetization of the transformer, even when the multiplex transformer having a common magnetic path is used. SOLUTION: An AC-side output voltage command for controlling power converters 3A-3C is outputted from a voltage current control circuit 9. Meanwhile, magnetic flux which includes the effect of mutual stages is calculated by a transformer magnetic flux state calculation part 16, a transformer-biased magnetization quantity calculating sections 10A-10C, and output voltage value DC component correction control parts 11A-11C. A voltage command correction is outputted, and two outputs are added in adders 13A-13C. |
