The capacitor commutated converter (CCC) is a new type of HVDC converter topology which shows promise for use in long distance transmission via cables. This technology is, thus, a potential candidate for use in HVDC transmission across large bodies of water. In this paper the technology of Capacitor Commutated Converters (CCC) is presented and the advantages of the CCC for high power transmission are shown. The transient performances are presented using PSCAD/EMTDC. The system is derived from the first CIGRÉ HVDC Benchmark model. The results demonstrate the superior performance of a CCC link, when connected to a very weak AC system in terms of increased transmission capacity and improved stability of the AC network.

Keywords: HVDC transmission, CIGRÉ HVDC benchmark model, Commutated capacitor current (CCC) inverter, Very weak receiving AC system.