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A coordination control strategy for parallel-connected boost converters in dc microgrid

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Publicado en:Journal of Physics: Conference Series vol. 2704, no. 1 (Feb 2024), p. 012014
Autor principal: Lin, Jinwei
Otros Autores: Wang, Dongsheng, Zhang, Le, Ji, Tao, Wang, Hui
Publicado:
IOP Publishing
Materias:
Current distribution
Distributed generation
Errors
Coordination
Electric potential
Proportional integral
Parallel connected
Voltage
Current sharing
Damping
Acceso en línea:Citation/Abstract
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Resumen:Due to the constant power loads (CPLs), the system damping of the DC microgrid is reduced, which will lead to the collapse of bus voltage. In addition, the errors of current sharing amplify due to different line impedances. To address these issues, a hybrid coordination control strategy is proposed for parallel-connected boost converters, which realizes stable control and maintains the accuracy of the current distribution. Firstly, a passivity-based control (PBC) with a proportional-integral (PI) regulator is developed. The virtual damping-based PBC enhances the system damping and the PI regulator eliminates errors. On this basis, a secondary voltage control (SVC) featuring simplicity and weak dependence on communication is introduced to remove the errors of current distribution. Finally, the hybrid coordination control strategy is verified by RT-LAB-based hardware in the loop (HIL) experiment.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/2704/1/012014
Fuente:Advanced Technologies & Aerospace Database