Mode changing stability of wind turbine in an integrated wind turbine and rechargeable battery system

Author

Mecklenborg, C.A. ; Palejiya, D. ; Hall, J.F. ; Dongmei Chen

fYear

2011

fDate

June 29 2011-July 1 2011

Firstpage

5213

Lastpage

5218

Abstract

Power generated by wind turbines changes due to variation in wind speed that is independent of the load power. Rechargeable batteries could be used as a reserve power source to alleviate unbalance between the load power and power generated by wind turbines. A supervisory controller is proposed for an integrated wind turbine-battery system (wind turbine electrically connected to a rechargeable battery). The switching conditions for wind turbine controller operating in multi-input and single-input control modes are discussed. Stability of the wind turbine controller switching between the two modes is analyzed using linearized, open-loop approximation of wind turbine dynamics at the switching instants. A Common Quadratic Lyapunov Function (CQLF) is established for both control modes to prove the system stability. Simulation results demonstrating system stability are also discussed.

Keywords

Lyapunov methods; open loop systems; power generation control; power system stability; secondary cells; wind turbines; CQLF; common quadratic Lyapunov function; integrated wind turbine-rechargeable battery system; linearized approximation; mode changing stability; multi-input single-input control; open-loop approximation; reserve power source; supervisory controller; system stability; wind speed; wind turbine controller switching stability; Batteries; Stability analysis; Switches; Wind power generation; Wind speed; Wind turbines;

fLanguage

English

Publisher

ieee

Conference_Titel

American Control Conference (ACC), 2011

Conference_Location

San Francisco, CA

ISSN

0743-1619

Print_ISBN

978-1-4577-0080-4

Type

conf

DOI

10.1109/ACC.2011.5991267

Filename

5991267