| 摘要 |
PROBLEM TO BE SOLVED: To provide a device that parallel-operates at least two inductively coupled inverters at an equal rating, and that dispenses with an additional synchronizing line and/or communication line for the parallel operation. SOLUTION: Each of the inverters is provided with a control circuit purposing the control of an output voltage a reference voltage uref is fed to the control circuit as a desired voltage, the frequency (f) of the reference voltage is obtained from active power P taking into consideration a frequency static condition that is specified in advance, and the amplitude |u| of the reference voltage is obtained from reactive power Q of the inverter taking into consideration a voltage static condition that is specified in advance. The value of a phase ϕof the reference voltage uref is obtained too, from the active power P taking into consideration a weighing coefficient St1' that is specified in advance, thus preventing the vibration and accumulation of the active power component. |
