HVDC networks for offshore wind power: Current ripple and cables

Offshore wind power is attracting increasing levels of research and investment. The use of HVDC transmission and development of DC grids are topics with similar levels of interest that go hand in hand with the development of large scale, far from shore wind farms. In this paper, technical challenges resulting from the interaction between power electronic DC-DC converters and the cables in a DC transmission network are identified. Also the behaviour of a typical ripple current generated by such converters in a small DC network is simulated.