Impact of composite loads on dynamic loadability of emerging distribution systems

Dahal, S., Mithulananthan, N. and Saha, T. (2011). Impact of composite loads on dynamic loadability of emerging distribution systems. In: AUPEC 2011 proceedings. 21st Australasian Universities Power Engineering Conference (AUPEC), 2011, Brisbane, Australia, (1-6). 25-28 September 2011.

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Name Description MIMEType Size Downloads
Author Dahal, S.
Mithulananthan, N.
Saha, T.
Title of paper Impact of composite loads on dynamic loadability of emerging distribution systems
Conference name 21st Australasian Universities Power Engineering Conference (AUPEC), 2011
Conference location Brisbane, Australia
Conference dates 25-28 September 2011
Proceedings title AUPEC 2011 proceedings
Journal name 2011 21st Australasian Universities Power Engineering Conference, AUPEC 2011
Place of Publication Piscataway, NJ, United States
Publisher IEEE
Publication Year 2011
Sub-type Fully published paper
ISBN 9781457717932
Start page 1
End page 6
Total pages 6
Collection year 2012
Language eng
Abstract/Summary Integration of renewable energy resources has introduced a number of dynamic stability issues in distribution systems. One of the major issues is the dynamic loadability limit, which is caused by a pair of eigenvalues crossing the imaginary axis of a complex plane. Due to the influx of distributed generators and controllers, a possible negative interaction can limit the dynamic loadability of emerging distribution networks. Similar to generators, loads can also actively participate in system dynamics which may sometimes lead to instability. The load contribution depends on their type and composition. A suitable load model should be used for accurate stability assessment to reflect the real impact of load dynamics. In this paper, contribution of a load model to the dynamic loadability of emerging distribution system is examined in detail. Tracking of Hopf bifurcation phenomenon has been used for identification of the critical modes. Indices based on extended eigenvectors are utilized for load ranking. The approach is verified by comparing the results of composite load modeling of high and low ranked loads. The results of composite load modeling of multiple buses with varying composition of static and dynamic load are also presented. The results suggest that dynamic loads deteriorate the dynamic loadability of distribution systems.
Keyword Distributed generation
Extended eigenvector
Composite load model
Renewable energy
Small signal stability
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes The theme of this year's conference is "Integrating Renewables into the Grid".

 
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Created: Wed, 21 Dec 2011, 16:29:18 EST by Ms Deborah Brian on behalf of School of Information Technol and Elec Engineering