DocumentCode :
3195548
Title :
An adaptive power system equivalent for real-time estimation of stability margin using phase-plane trajectories
Author :
Sun, Kai ; Lee, Stephen T. ; Zhang, Pei
fYear :
2011
fDate :
20-23 March 2011
Firstpage :
1
Lastpage :
1
Abstract :
Summary form only given: This paper studies real-time estimation of stability margin of a power system under disturbances by continuous measurement data. The paper presents a Ball-On-Concave-Surface (BOCS) mechanics system as a power system´s adaptive equivalent representing its real-time status and the stability region about a monitored variable. The parameters of the equivalent are adaptive to the operating condition and can online be identified from the phase-plane trajectories of the monitored variable. Accordingly, the stability margin and risk of instability can be estimated. Case studies on a two-generator system and a 179-bus system show that the BOCS system can be applied either locally or for wide-area stability monitoring in real-time calculation of stability margin. This paper proposes a new idea for using real-time measurements to develop and identify a power system´s adaptive equivalent as a basis for online prediction of instability.978-1-61284-788-7/11/$26.00
Keywords :
fault diagnosis; power system stability; 179-bus system; adaptive power system equivalent; ball-on-concave-surface mechanics system; continuous measurement data; phase-plane trajectories; stability margin; two-generator system; wide-area stability monitoring; Adaptive systems; Estimation; Monitoring; Power system stability; Real time systems; Trajectory;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Power Systems Conference and Exposition (PSCE), 2011 IEEE/PES
Conference_Location :
Phoenix, AZ
Print_ISBN :
978-1-61284-789-4
Electronic_ISBN :
978-1-61284-787-0
Type :
conf
DOI :
10.1109/PSCE.2011.5772441
Filename :
5772441
Link To Document :
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