Alternating arm current source converter, power conversion system and method of controlling such a converter

The invention relates to an alternating arm current source converter (AACSC) connected in series over a high voltage direct current (HVDC) transport link, for direct current (DC) flow to and / or to the link (HVDC). The alternating arm current source converter is connected to an alternating current (AC) network for the circulation of alternating current from and / or to the alternating current (AC) network. The converter (AACSC) includes at least one directional switch (DS) and one sub-module cell connected in parallel, the directional switch (DS) being controlled according to a current flowing through the sub-module cell. The invention also relates to a power conversion system comprising such a converter (AACSC) and to a method for converting power over a link (HVDC) by using such a converter (AACSC). 本发明涉及一种本发明涉及在高压直流(HVDC)传输链路上串联的交替臂电流源转换器(AACSC)，用于直流电(DC)从和/或到链路(HVDC)的流动，并且连接到交流(AC)网络，用于交流电从和/或到交流(AC)网络的流动。转换器(AACSC)包括至少一个导向开关(DS)和并联连接的子模块的单元，根据流过子模块的单元的电流来控制导向开关(DS)。本发明还涉及一种包括这种转换器(AACSC)的功率转换系统，并且涉及一种利用