| 摘要 |
<p>A control method of the invention is formed with the steps of when a margin angle y reaches a given minimum margin angle ymin during the operation of a rectifier and inverter, a shunt reactor is disconnected from, or a shunt capacitor is connected to, an AC line of the inverter, and when the margin angle y exceeds the minimum margin angle ymin by a predetermined value, the shunt reactor is connected to, or the shunt capacitor is disconnected from, the AC line.</p> |
