LFAC-transmission systems for remote wind farms using a three-phase, six-pulse cycloconverter

Author

Cho, Yongnam ; Cokkinides, George J. ; Meliopoulos, A.P.

Author_Institution

Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA

fYear

2012

fDate

16-18 July 2012

Firstpage

1

Lastpage

7

Abstract

This paper presents an alternative transmission system for remote wind farms to main grids using a low-frequency AC (LFAC) technology and a robust-modeling method for analysis of the alternative-transmission systems. The LFAC transmission system uses a lower frequency (20Hz/16.666Hz) than nominal frequency (60Hz/50Hz) of main grids by introducing a three-phase six-pulse cycloconverter. The benefits of the LFAC transmission system are demonstrated as follows: reduced-investment cost compared with HVDC-transmission systems and increased power transfer capability as compared with 60Hz-HVAC transmission systems. In this paper, the economical and technical benefits of LFAC transmission systems are presented, the modeling method using the quadratic-integration method is presented, and the superior properties of the quadratic integration are demonstrated with an example LFAC-transmission system.

Keywords

cycloconvertors; integration; investment; power generation economics; wind power plants; HVAC transmission systems; LFAC-transmission systems; frequency 16.666 Hz; frequency 20 Hz; frequency 50 Hz; frequency 60 Hz; low-frequency AC technology; power transfer capability; quadratic-integration method; reduced-investment cost; remote wind farms; robust-modeling method; three-phase six-pulse cycloconverter; Differential equations; Equations; HVDC transmission; Mathematical model; Phase transformers; Voltage control; Wind farms; Quadratic integration; cosine wave crossing method; low frequency transmission; three phase six-pulse cycloconverter; wind energy transmission;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and Machines in Wind Applications (PEMWA), 2012 IEEE

Conference_Location

Denver, CO

Print_ISBN

978-1-4673-1128-1

Type

conf

DOI

10.1109/PEMWA.2012.6316404

Filename

6316404