Design of non-interacting controllers for PV systems in distribution networks

Hossain, M. J., Mahmud, M. A., Pota, Hemanshu R. and Mithulananthan, Nadarajah (2014) Design of non-interacting controllers for PV systems in distribution networks. IEEE Transactions on Power Systems, 29 6: 2763-2774. doi:10.1109/TPWRS.2014.2315803

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Author Hossain, M. J.
Mahmud, M. A.
Pota, Hemanshu R.
Mithulananthan, Nadarajah
Title Design of non-interacting controllers for PV systems in distribution networks
Journal name IEEE Transactions on Power Systems   Check publisher's open access policy
ISSN 0885-8950
1558-0679
Publication date 2014-04-18
Year available 2014
Sub-type Article (original research)
DOI 10.1109/TPWRS.2014.2315803
Volume 29
Issue 6
Start page 2763
End page 2774
Total pages 12
Place of publication Piscataway, NJ, United States
Publisher Institute of Electrical and Electronics Engineers
Collection year 2015
Language eng
Formatted abstract
This paper makes two contributions. Firstly, it is shown that there may exist oscillations in distribution networks with physically close photovoltaic (PV) units due to their control interactions. The main reason for oscillations is changes in the dynamics of PV units with varying solar irradiance and the decentralized tuning of control parameters for the nominal operating condition. Eigenvalue analysis, nonlinear interaction index, and time-domain simulations are used to assess the degree and impacts of dynamic interactions. Secondly, a decentralized robust control design is proposed to ensure a non-interacting and well-damped response under varying operating conditions for physically close PV units. The control design process uses an estimate of changes in the model due to variations in solar irradiations, changing electric loads, and the dynamics of the physically close PV units. A minimally conservative method is used to capture the estimate as a norm-bounded uncertainty. Time-domain simulations on a test distribution system verify the predictions of the interaction analysis and demonstrate the performance of the proposed robust controller under different system contingencies.
Keyword Terms-Distribution systems
Dynamic interactions
Photovoltaic unit
Robust control
Stability and uncertainty
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Date of Publication : 18 April 2014

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2015 Collection
School of Information Technology and Electrical Engineering Publications
 
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Created: Sun, 20 Apr 2014, 21:24:10 EST by Dr Mithulan Nadarajah on behalf of School of Information Technol and Elec Engineering