Optimal acquisition and aggregation of offshore wind power by multiterminal voltage-source HVDC

TLDR

Offshore wind energy exploitation requires underwater power transmission, and DC transmission is preferred over AC to avoid large capacitive reactance currents, especially in shallow coastal waters such as the Baltic Sea where wind turbines are located 10–30 km from shore. The paper seeks to determine the optimal acquisition and aggregation strategy for wind power using multiterminal high‑voltage direct‑current systems. This is achieved with sinusoidal pulse‑width‑modulated, three‑phase voltage‑source converters connected at the AC terminals of wind turbine generators.

Abstract

This paper addresses the exploitation of the offshore wind energy. A good example is in the shallow coastal waters around the Baltic Sea where there is high potential for wind turbines, located 10-30 km from the shore. The underwater transmission of power to shore has to be by cables. Therefore, DC transmission is required to avoid the large capacitive reactance currents of AC cables. This paper describes the optimal acquisition and aggregation of wind power by multiterminal high-voltage direct current based on sinusoidal pulse-width-modulated, three-phase voltage-source converters connected at their AC terminals to the wind turbine generators.