| abstract |
The utility model provides a kind of clamped submodule of capacitance, the modularization multi-level converter using it, and the clamped submodule of capacitance includes transistor T 1 、T 2 、T 3 , three diodes D 1 、D 2 、D 3 , a capacitor C .Wherein, T 1 、T 2 、T 3 Collector respectively with D 1 、D 2 、D 3 Cathode be connected, T 1 、T 2 、T 3 Emitter respectively with D 1 、D 2 、D 3 Anode be connected.Capacitor C Positive terminal with T 1 Collector be connected, and the two junction draw submodule high-voltage output end；Capacitor C Negative pole end with T 2 Emitter be connected. T 3 Collector with T 2 Collector be connected, and the two junction draw submodule low-voltage output； T 3 Emitter with T 1 Emitter be connected.The utility model can effectively block direct fault current；After wholly-controled device locking, it can be acted on by the one-way conduction of diode to inhibit the afterflow of bridge arm reactor, failure blocking ability is stronger. |