Abstract
Voltage regulation and proper load-sharing are two main control objectives of DC microgrids which the consensus-based secondary control can be regarded as a feasible approach to achieve them. Using this approach, in addition to the stable voltage regulation, the load is shared according to the nominal potential of the distributed generation units. Nevertheless, the conventional consensus-based secondary control uses the time-triggered communication paradigm that leads to a high communication burden due to transmitting and receiving unnecessary data. In this paper, to prevent excessive data-exchanging, the mentioned approach is upgraded with a novel event-triggered scheme. The system stability analysis under the suggested event-triggered secondary controller is assessed using the Lyapunov theorem. Furthermore, the Zeno-freeness feature of the proposed solution is mathematically proved after assessing uniformly ultimately bounded stability and extracting the current per-unit and voltage derivatives dynamic as the consensus algorithms external inputs. The proposed approach is applied to a DC microgrid, and its performance is validated under different scenarios using Simulink/MATLAB environment. Moreover, the experimental tests prove the merits of the suggested method.
Original language | English |
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Journal | IEEE Transactions on Power Systems |
Volume | 37 |
Issue number | 5 |
Pages (from-to) | 3834-3846 |
Number of pages | 13 |
ISSN | 0885-8950 |
DOIs | |
Publication status | Published - 1 Sept 2022 |
Bibliographical note
Publisher Copyright:IEEE
Keywords
- Bandwidth
- Consensus algorithm
- DC microgrids
- eventtriggered control
- Laplace equations
- Microgrids
- Power system dynamics
- Power system stability
- Reliability
- secondary control
- Voltage control
- voltage regulation
- event-triggered control