Small signal stability analysis of a hybrid AC/DC microgrid with static and dynamic loads

Ahmed, M, Vahidnia, A, Meegahapola, L and Datta, M 2017, 'Small signal stability analysis of a hybrid AC/DC microgrid with static and dynamic loads', in Proceedings of the 2017 IEEE Australasian Universities Power Engineering Conference (AUPEC 2017), Melbourne, Australia, 19-22 November 2017, pp. 199-204.


Document type: Conference Paper
Collection: Conference Papers

Title Small signal stability analysis of a hybrid AC/DC microgrid with static and dynamic loads
Author(s) Ahmed, M
Vahidnia, A
Meegahapola, L
Datta, M
Year 2017
Conference name AUPEC 2017: Smart Power Grid in the 21st Century
Conference location Melbourne, Australia
Conference dates 19-22 November 2017
Proceedings title Proceedings of the 2017 IEEE Australasian Universities Power Engineering Conference (AUPEC 2017)
Publisher IEEE
Place of publication United States
Start page 199
End page 204
Total pages 6
Abstract Majority of the stability studies conducted on AC and DC microgrids have investigated stability with only static loads in the microgrid. Dynamic loads significantly influence the stability of mirogrids due to their voltage and frequency dependent nature. Therefore, small variation in voltage and frequency can make significant impact on the stability of the microgrid with the presence of dynamic loads. Thus, it is imperative to consider the dynamic loads in the microgrid for stability studies. Moreover, stability issues become more severe if the microgrid is operated in the standalone mode. This paper characterises the small-signal stability of a hybrid AC/DC microgrid with static and dynamic loads using state-space and dynamic simulation models developed in MATLAB/Simulink. This study investigates the critical parameters of the dynamic load which significantly affect the stability of the microgrid. Subsequently, eigenvalue analysis and time-domain simulations have been carried out to investigate the small-signal stability of the hybrid AC/DC microgrid. Eigen-sensitivity analysis has revealed that induction machine rotor resistance has the highest participation on the critical modes of the hybrid AC/DC microgrid. Additionally, the controller gains of the voltage source converters may require re-tuning due to the presence of dynamic loads.
Subjects Renewable Power and Energy Systems Engineering (excl. Solar Cells)
Power and Energy Systems Engineering (excl. Renewable Power)
Keyword(s) AC/DC hybrid microgrid
dynamic load
Eigen value analysis
induction machine
participation factor
small signal stability
DOI - identifier 10.1109/AUPEC.2017.8282414
Copyright notice © IEEE 2017
ISBN 9781538626481
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