| 摘要 |
PROBLEM TO BE SOLVED: To provide a system interconnection inverter which performs changeover of boosting operation and deboosting operation easily. SOLUTION: This is a system interconnection inverter which supplies power from a DC power source 11 to a system 17, and is provided with a boosting/ deboosting converter 13 which deboosts the DC voltage 11 when the DC voltage 11 is higher than the absolute value of the voltage of the system, and boosts the DC voltage when the DC voltage is lower than the absolute value of the voltage of the system 17, an inverter 15 for converting the output of the boosting/deboosting converter 13 into AC, and a control circuit 16 for controlling the operation of the boosting/deboosting converter 13. The control circuit 16 controls the boosting operation performed by the boosting/deboosting converter 13 by comparing a first carrier wave with a control signal wave generated at least on the basis of a current value IL flowing in the boosting/deboosting converter 13, and controls the deboosting operation performed by the boosting/deboosting converter 13 by comparing a second carrier wave with the control signal wave. |
