Abstract
With the increase distance of offshore wind farm, the investment proportion of high-voltage delivery submarine cable in the whole project is gradually increasing, so the reasonable selection of cable delivery scheme becomes more and more important. In this paper, for different scales of offshore wind farms, the preliminary selection basis of two delivery schemes of AC high-voltage and flexible DC is proposed, and the economic and technical comparison principles of different AC delivery schemes are further analyzed with engineering example. In general, for medium-sized offshore wind farms, if the AC high-voltage transmission scheme is used, a reactive power compensation station can be set in the middle of the cable to improve the current distribution on the cable.
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