| 摘要 |
PROBLEM TO BE SOLVED: To provide an inverter device that can more reliably detect individual operation.SOLUTION: The inverter device includes: a power conversion section for converting DC power into AC power for system interconnection with a commercial power system; a system frequency measurement section for measuring a system frequency; an individual operation detection section for monitoring the system frequency to detect individual operation; a frequency feedback section for injecting reactive power depending on deviation of the system frequency to promote frequency change in the system frequency; a reactive power step injection section for step-injecting the reactive power to force deviation of the system frequency when surge in harmonic voltage is detected; and a current control processing section for performing current control on the power conversion section. The current control processing section performs current control on the power conversion section so as to provide a greater harmonic component of output current than normal for a first period when slight increase in the harmonic voltage is detected. |
