The HVDC Plus system, which has a spec similar to ABB's HVDC Light, is suitable for direct current links up to 1,000 MW capacity in applications where line-commutated converters are still generally used. In contrast, the HVDC-Plus system employs power semiconductors that have both turn-on and turn-off capability. As a result, the commutation processes in the converter are independent of the AC system voltage. Main applications are expected to be in low-loss transport of electrical energy from offshore wind farms to the coast and the more economical and environmentally-friendly supply of power to oil platforms from the AC system on the mainland.
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