PROJECT TITLE :

Isolated AC Ð DC Converter Using Medium Frequency Transformer for Off-Shore Wind Turbine DC Collection Grid - 2017

ABSTRACT:

This paper investigates a dc assortment grid architecture to process energy from offshore wind turbine generators (WTGs), that can be further interfaced with the shore via a high-voltage dc network. Within the proposed approach, WTG output voltage is rectified and converted to medium frequency (MF). Then, a transformer isolation stage is used, followed by a lift rectification stage. The boost rectification stage is controlled to emulate a resistive load, forming a medium voltage dc (MVDC) interconnection. This kind of control is easy for varying wind conditions. The operating principles and distinctive benefits of the proposed approach are documented together with comparison with a conventional benchmark, assuming the turbines are fitted with direct drive technology. System style example, loss/size analysis and transformer finite part analysis are shown in this paper. Simulation results demonstrate the useful capability of the system. Experimental results from a scaled down prototype prove the operation of proposed concept.