CHAIN LINK CONVERTER SYSTEM WITH DIFFERENT DC SOURCES AND METHOD FOR OPERATION

摘要

The invention relates to an electrical chain link converter system (101) comprising a converter phase leg (102) for converting a plurality of DC electrical currents from a plurality of DC power sources (103) to an AC current of an electrical power distribution network (104). The phase leg comprises a plurality of serially connected converter cells (105) each of which is connected to a respective power source (103) of the plurality of DC power sources. The system also comprises a control unit (106) associated with the phase leg the control unit comprising a processor; and a storage unit storing instructions that when executed by the processor cause the control unit to for each of the converter cells: obtain a dedicated voltage reference for the converter cell; and transmit the voltage reference to the converter cell.