Title :
Comparative study of the efficiency and power density of offshore WECS with three-phase AC-link
Author :
Barrera-Cardenas, Rene ; Holtsmark, Nathalie ; Molinas, Marta
Author_Institution :
Dept. of Electr. Power Eng., Norwegian Univ. of Sci. & Technol., Trondheim, Norway
Abstract :
In this paper three converter topologies are compared for the AC-AC conversion stage of an offshore wind turbine with permanent magnet synchronous generator. The WECS (Wind Energy Conversion System) is based on four stages: an input filter, an AC-AC converter, a three-phase high-frequency transformer and a full-bridge diode rectifier. The conventional back-to-back converter, the matrix converter and the indirect matrix converter are the three selected topologies. Analytical models and numerical simulations are considered in order to evaluate the WECS efficiency and power density as a function of the operational frequency of the transformer. It was found that for range of transformer frequencies from 100[Hz] to 10[KHz], the direct matrix converter topology was the most efficient topology and had the highest power density. In general, the back-to-back converter topology presents the lowest efficiency and power density in the range of frequencies considered.
Keywords :
AC-AC power convertors; high-frequency transformers; matrix convertors; numerical analysis; offshore installations; permanent magnet generators; power filters; power transformers; rectifying circuits; synchronous generators; wind power plants; wind turbines; AC-AC conversion stage; AC-AC converter; WECS efficiency; analytical models; back-to-back converter topology; converter topology; direct matrix converter topology; frequency 100 Hz to 10 kHz; full-bridge diode rectifier; indirect matrix converter; input filter; numerical simulations; offshore WECS; offshore wind turbine; permanent magnet synchronous generator; power density; three-phase AC-link; three-phase high-frequency transformer; wind energy conversion system; Capacitors; Insulated gate bipolar transistors; Magnetic cores; Matrix converters; Switching frequency; Topology; Windings; Back-to-Back Converter; Efficiency; High-frequency Transformer; Matrix Converter; Offshore Wind Power Converter; Power Density; Wind Energy Conversion System;
Conference_Titel :
Power Electronics for Distributed Generation Systems (PEDG), 2012 3rd IEEE International Symposium on
Conference_Location :
Aalborg
Print_ISBN :
978-1-4673-2021-4
Electronic_ISBN :
978-1-4673-2022-1
DOI :
10.1109/PEDG.2012.6254081
