Power conversion circuit and program for use in power conversion circuit

A power conversion circuit comprising:

• a first input terminal, a second input terminal, and a third input terminal that are connected to a three-phase AC power source and to which a first voltage, a second voltage, and a third voltage are respectively input in a one-to-one correspondence, the first voltage, the second voltage, and the third voltage being AC voltages that differ in phase from each other;
• a plurality of bidirectional switches each connected to a corresponding one of the first input terminal, the second input terminal, and the third input terminal;
• a first output terminal and a second output terminal that are connected to the plurality of bidirectional switches and configured to output AC power;
• and control circuitry configured to control the plurality of bidirectional switches according to a first switching sequence or a second switching sequence, the first switching sequence defining a plurality of combinations of ON/OFF states of the plurality of bidirectional switches and an order in which to switch between the plurality of combinations, the second switching sequence defining, in a manner different from the first switching sequence, a plurality of combinations of ON/OFF states of the plurality of bidirectional switches and an order in which to switch between the plurality of combinations,
• wherein the control circuitry is configured to control the plurality of bidirectional switches according to the first switching sequence during a first interval in which a first one of the first voltage, the second voltage, and the third voltage is greater in absolute value than a second one of the first voltage, the second voltage, and the third voltage,
• wherein the control circuitry is configured to switch from a the control according to the first switching sequence to the control according to the second switching sequence after the second one of the first voltage, the second voltage, and the third voltage becomes greater in absolute value than the first one of the first voltage, the second voltage, and the third voltage, and at a time when matching occurs between an ON/OFF state of bidirectional switches through which current flows among the plurality of bidirectional switches in the control according to the first switching sequence and an ON/OFF state of bidirectional switches through which current flows among the plurality of bidirectional switches in the control according to the second switching sequence to which the first switching sequence is to be switched.