SUB-MODULE OF A MODULAR BRAKING UNIT, BRAKING UNIT, AND METHOD FOR OPERATING THE BRAKING UNIT

摘要

The invention relates to a sub-module (12) of a modular braking unit (11) that is connected to a DC transmission network, wherein every sub-module (12) has an inverse diode (3), and a storage capacitor (5) positioned in parallel to the inverse diode via a free-wheel diode (4), as well as an energy-consuming switching unit (6) connected to the storage capacitor (5). According to the invention, in order to provide a sub-module of this type such that the braking unit can function with relatively low losses in the stand-by/idle state, the sub-module (12) is provided with an actively switchable semiconductor bypass path (13) in parallel to the inverse diode (3). The invention also relates to a braking unit (11) having a number of in-series sub-modules (12) in the embodiment according to the invention, and to a method for operating a braking unit of this type.