| 摘要 |
The invention relates to a hybrid converter (18) for transmitting electrical power between an alternating voltage network (2) carrying alternating voltage and a direct voltage network (3), comprising a network-clocked converter (4), the power semiconductor switches (9) of which are designed to switch on once in a period of the alternating voltage and which is connected to a connection unit (10) for connecting the alternating voltage network (2), and a self-commutated converter (19), which likewise can be connected to said alternating voltage network (2) and which comprises phase module branches (20) having power semiconductor switches (27, 28, 34, 35) that can be switched both on and off and which is connected in series with the network-commutated converter (4). The aim of the invention is to effectively damp overtones of the fundamental oscillation both on the direct voltage side and on the alternating voltage side of the hybrid converter and to provide a converter having a simple construction and thus being cost-effective at the same time. In order to achieve said aim, the phase module branches (20) have a series circuit of sub-modules (24), wherein each sub-module (24) has two connection terminals (31, 32), an energy store (25), and a power semiconductor circuit of power semiconductor switches (27, 28, 34, 35) that can be switched on and off, said power semiconductor switches being controllable in such a way that the voltage that drops at the energy store or a zero voltage at the two connection terminals (31, 32) of the respective sub-module (25) drops. |
