1results about How to "Realize frequency conversion control" patented technology

The application discloses a pumped storage full-power frequency converter power unit variable frequency control method and device, N power units are cascaded at an AC end to form a test valve, and M power units are cascaded at the AC end to form a test valve; the method is used for controlling the test valve to output several AC frequency target values, and the method comprises the following steps: pre-charging DC capacitors in the test valve and the test valve to target values; determining corresponding output current / power target values according to the AC frequency target values to be output; controlling the turn-on and turn-off time of the turn-off semiconductor of each power unit in the test valve and the test valve, so that the actual output current / power of the test valve is the output current / power target value, and the actual output frequency of the test valve is the AC frequency target value. The application can simulate the continuous speed regulation operation condition of the pumped storage full-power frequency converter power unit on the pumped storage unit.