Grid connection of offshore wind farm based DFIG with low frequency AC transmission system

Author

Mau, C.N. ; Rudion, K. ; Orths, A. ; Eriksen, P.B. ; Abildgaard, H. ; Styczynski, Z.A.

Author_Institution

Otto-von-Guericke-Univ. Magdeburg, Magdeburg, Germany

fYear

2012

fDate

22-26 July 2012

Firstpage

1

Lastpage

7

Abstract

This paper uses a simulation to investigate the feasibility of applying low frequency AC (LFAC) transmission technology to connect large offshore wind farms to the onshore power system. Compared to the conventional AC transmission system with a power frequency of 50 or 60 Hz, the LFAC system can transfer more power through longer distance and with lower investment costs than the HVDC solution. Firstly, the characteristics of power cable operation at low frequency are discussed. Then a grid connection of an offshore wind farm based on a doubly fed induction generator (DFIG) through LFAC is studied. The simulation results show that there are no difficulties for the wind farm based DFIG when it operates at low frequency. Moreover, the reactive power control at the line side of DFIG can be applied to improve the operation of the cable.

Keywords

asynchronous generators; offshore installations; power cables; power grids; power transmission; wind power plants; DFIG; HVDC solution; LFAC system; doubly fed induction generator; frequency 50 Hz; frequency 60 Hz; grid connection; low frequency AC transmission system; offshore wind farm; onshore power system; power cable operation; reactive power control; Frequency conversion; HVDC transmission; Inductors; Power cables; Reactive power; Rotors; Wind farms; doubly fed induction generator (DFIG); low frequency ac (LFAC) transmission; offshore wind farm (OWF);

fLanguage

English

Publisher

ieee

Conference_Titel

Power and Energy Society General Meeting, 2012 IEEE

Conference_Location

San Diego, CA

ISSN

1944-9925

Print_ISBN

978-1-4673-2727-5

Electronic_ISBN

1944-9925

Type

conf

DOI

10.1109/PESGM.2012.6345481

Filename

6345481