Power conversion device

A power conversion device, comprising:

• a bidirectional AC/DC converter that converts input alternating-current power into direct-current power and outputs the direct-current power, and converts input direct-current power into alternating-current power and outputs the alternating-current power;
• an AC outlet connectable to the bidirectional AC/DC converter;
• a bidirectional DC/DC converter that converts a voltage value of the direct-current power, input from the bidirectional AC/DC converter, into a different voltage value and outputs converted direct-current power;
• a capacitor arranged between the bidirectional AC/DC converter and the bidirectional DC/DC converter;
• a controller that controls the bidirectional AC/DC converter and the bidirectional DC/DC converter;
• and
• a voltage detector that detects a voltage value of the capacitor, wherein
• the controller is configured to determine whether the alternating-current power, output from the bidirectional AC/DC converter, is greater than or equal to a predetermined value, and whether the voltage value of the capacitor, detected by the voltage detector, is greater than or equal to a threshold value,
• the controller is configured to stop controlling the bidirectional DC/DC converter when determining that the alternating-current power, output from the bidirectional AC/DC converter, is not greater than or equal to the predetermined value and that the voltage value of the capacitor is greater than or equal to the threshold value, and
• the controller is configured to charge the capacitor by controlling the bidirectional DC/DC converter when determining that the alternating-current power, output from the bidirectional AC/DC converter, is not greater than or equal to the predetermined value and that the voltage value of the capacitor is less than the threshold value.