A Consideration on the Characteristics of Output, Loss, and Capacity Factor of Offshore Wind Farm

Abstract

A number of offshore wind farms are being in operation in the world. It is important to evaluate the characteristics of losses and output power of a large scale wind generation system like an offshore wind farm. This technical note presents analyses about the output power and loss characteristics of an offshore wind farm composed of permanent magnet synchronous generators (PMSG), power converters, and high voltage transmission cables connected to the onshore grid, in which two types of transmission systems, that is, HVAC and HVDC systems, are considered. Comparative analysis between the wind farms with two transmission systems is performed about annual output energy, system losses, and capacity factor for some typical regions whose wind speed data are expressed by the probability density distribution function obtained from Local Area Wind Energy Prediction System (LAWEPS) in NEDO homepage in Japan.