| 摘要 |
A controller (38) controls a first switch (S1), a second switch (S2), a third switch (S3), a fourth switch (S4), a fifth switch (S5) and a sixth switch (S6), so that an alternating current electric power is fed to an alternating current electric grid (2). Moreover, the controller (38) firstly turns on a first route including the first switch (S1) and the second switch (S2), and then the controller (38) turns on a second route including the third switch (S3) and the fourth switch (S4) if the second route meets a first specific condition, and then the controller (38) turns on a third route including the fifth switch (S5) and the sixth switch (S6) if the third route meets a second specific condition. |
