Nesterov, N. and Odavic, M. orcid.org/0000-0002-2104-8893 (2019) Influence of parametric uncertainties and their interactions on small-signal stability : a case example of parallel-connected active loads in a DC microgrid. The Journal of Engineering, 2019 (17). pp. 4315-4320.
Abstract
Classical stability analysis techniques based on nominal models do not consider the uncertainty of system parameters, their interactions, and nonlinearity, which are important characteristics of practical highly coupled microgrids. In this work, variance-based sensitivity analysis is used to identify parameter combinations that have a significant impact on the small-signal stability of a microgrid featuring two parallel active loads. The analysis indicates that the effectiveness of source-side damping is reduced when resonant frequencies of load input filters become matched. Further results using derivative-based sensitivity analysis reveal that source-side resistance can exhibit drastically different effects on the stability if load input filter resonant frequencies are matched with respect to the case when they are well separated. These behaviours are verified using time-domain switching models.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | © 2019 IET - This an open access article published by the IET under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/) |
Keywords: | sensitivity analysis; power system stability; damping; distributed power generation; stability |
Dates: |
|
Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Electronic and Electrical Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 02 Jul 2019 14:12 |
Last Modified: | 02 Jul 2019 15:41 |
Status: | Published |
Publisher: | IET Digital Library |
Refereed: | Yes |
Identification Number: | 10.1049/joe.2018.8165 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:147649 |