Abstract
In this paper, we propose a secondary consensus-based control layer for current sharing and voltage balancing in DC microGrids (mGs). Differently from existing approaches based on droop control, we assume decentralized Plug-and-Play (PnP) regulators at the primary level, as they provide voltage stabilization and their design complexity is independent of the mG size. We analyze the behavior of the closed-loop mG by approximating local primary control loops with unitary gains. This analysis can be extended to the more complex case where primary control loops are abstracted into first-order transfer functions (Tucci et al., 2016a). Besides showing stability, current sharing, and voltage balancing in the asymptotic régime, we describe how to design secondary controllers in a PnP fashion when Distributed Generation Units (DGUs) are added or removed. Theoretical results are complemented by simulations using a 5-DGUs mG implemented in Simulink/PLECS.
Original language | English |
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Book series | IFAC-PapersOnLine |
Volume | 50 |
Issue number | 1 |
Pages (from-to) | 12440-12445 |
Number of pages | 6 |
ISSN | 2405-8963 |
DOIs | |
Publication status | Published - Jul 2017 |
Event | 20th IFAC World Congress - Toulouse, France Duration: 9 Jul 2017 → 14 Jul 2017 https://www.ifac2017.org/ |
Conference
Conference | 20th IFAC World Congress |
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Country/Territory | France |
City | Toulouse |
Period | 09/07/2017 → 14/07/2017 |
Internet address |
Keywords
- Distributed control
- Voltage control
- Asymptotic stability
- Electrical networks
- Renewable energy systems