As offshore wind farms are being built farther from the coast and more offshore oil and gas installations are electrified from shore, there will be an increasing need for long distance underwater power transmission. For power transmission, high voltage direct current (HVDC) avoids the large charging currents causing energy losses in 50/60 Hz AC cable systems. HVDC therefore allows power transmission through cables over longer distances and higher capacities compared to what is feasible when using AC transmission. Hence, HVDC will often be the preferred solution for long distance power transmission.
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