Title :
Decentralized robust frequency control for power systems subject to wind power variability
Author :
Liu, Juhua ; Krogh, Bruce H. ; Ydstie, B. Erik
Author_Institution :
ABB US Corp. Res. Center at Raleigh, Raleigh, NC, USA
Abstract :
This paper concerns the re-design of generator compensators to improve frequency performance of power systems when the penetration of wind power is high. To assure system stability, a passivity-based decentralized control framework is developed for power systems by introducing a storage function derived from the entropy of individual generators. Based on the network topology, line and machine parameters, and the point of interconnection of the wind farm, a sensitivity measure is defined to help select a set of generators to balance wind power fluctuations. A sequential passivity-based decentralized robust control procedure is proposed to guarantee robust performance as well as the closed-loop stability. The effectiveness of the proposed control design is verified using a modified IEEE New England 39-bus test system.
Keywords :
closed loop systems; frequency control; power system interconnection; power system stability; robust control; wind power plants; IEEE New England 39-bus test system; closed-loop stability; decentralized robust frequency control; entropy; frequency performance; generator compensators; line parameters; machine parameters; network topology; passivity-based decentralized control; power systems; system stability; wind farm interconnection; wind power fluctuations; wind power variability; Distributed control; Frequency control; Generators; Power system stability; Sensitivity; Wind farms; Wind power generation; Decentralized control; H∞ methods; passivity; primary frequency control; wind power variability;
Conference_Titel :
Power and Energy Society General Meeting, 2011 IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
978-1-4577-1000-1
Electronic_ISBN :
1944-9925
DOI :
10.1109/PES.2011.6039222
