Integration Of Solid-State Transformer Of Off-Shore Wind Turbine Systems

Abstract

A solid state transformer(SST), when combined with a conventional back-to-back converter, is superior to a lowfrequency transformer in terms of weight and price, while the efficiency remains the same as that of a low frequency transformer. These attributes of SST make it an attractive choice for offshore wind turbine system to transfer high power to the transmission grid. The main focus of this paper is to design ten 200kW unidirectional full bridge modular DC-DC converter with ten 100kHz modular HF transformer in the PLECS platform and subsequently append the modular DC-DC converter with 3-level and 9-level NPC (Neutral point converter) converters to prove that 2MW energy can be transferred from offshore wind turbine systems(WTS) to MV grid efficiently.