A Unified Distributed Cooperative Control of DC Microgrids Using Consensus Protocol
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Fecha
2021-05
Profesor/a Guía
Facultad/escuela
Idioma
en_US
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Título del volumen
Editor
Institute of Electrical and Electronics Engineers Inc.
Nombre de Curso
Licencia CC
Licencia CC
Resumen
In this work, we propose an effective and simple control approach for islanded DC microgrids that allows each distributed generator (DG) to achieve accurate voltage regulation and power-sharing. An improved dynamic consensus protocol, which is robust to measurement noise and states initialization, is employed to enable each agent to locally calculate the average bus voltage with a sparse cyber network. On this basis, we propose a cooperative controller that merges the voltage regulation and power-sharing objectives in a unified fashion. The proposed approach only uses neighbors' voltage information to regulates the average bus voltage to its nominal value while maintaining proportional power-sharing or optimal power dispatch. This significantly simplifies its implementation and reduces the communication bandwidth requirement. A global model of the DC microgrid considering the cyber network is established in the form of a state-space-model, where the reference voltage vector corresponds to the input and the average bus voltage vector denotes the state. Then, the input-to-state stability analysis is carried out. To the end, comprehensive hardware-in-the-loop (HiL) tests are conducted to validate the effectiveness of the proposed control strategy. The proposed control strategy exhibits plug-and-play capability, and it is resilient to message update rate and communication failure.
Notas
Indexación: Scopus.
Palabras clave
Cooperative control, DC microgrids, distributed control, load sharing, stability analysis
Citación
IEEE Transactions on Smart Grid Volume 12, Issue 3, Pages 1880 - 1892 May 2021 Article number 9272997
DOI
10.1109/TSG.2020.3041378