| 摘要 |
PROBLEM TO BE SOLVED: To provide a bridging unit for short-circuiting a conversion cell of a multilevel converter.SOLUTION: The bridging unit 26 includes a mechanical bistable relay 34, an electronic power switch 36 and a drive unit 42, and is inserted between the input and output X1, X2 of the conversion cell 18. The electric power switch 36 includes a thyristor 38 driven by the drive unit 42 through a gate control 40. The drive unit 42 can transmit an open signal or a close signal to the mechanical relay 34 through a first signal wire 44, and the drive unit can also transmit the open signal or close signal to the gate control unit 40 through a second signal wire 46 to operate the electronic power switch 36. |
