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- Title
Design and Control of a Buck-Boost Charger-Discharger for DC-Bus Regulation in Microgrids.
- Authors
Ramos-Paja, Carlos Andrés; Bastidas-Rodríguez, Juan David; González, Daniel; Acevedo, Santiago; Peláez-Restrepo, Julián
- Abstract
In DC and hybrid microgrids (MG), the DC-bus regulation using Energy Storage Devices (ESD) is important for the stable operation of both the generators and loads. There are multiple commercial voltage levels for both ESD and DC-bus; therefore, the ESD voltage may be higher, equal or lower than the DC-bus voltage depending on the application. Moreover, most of the ESD converter controllers are linear-based, hence they ensure stability in a limited operation range. This paper proposes a system to regulate the DC-bus voltage of an MG accounting for any voltage relation between the ESD and the DC-bus voltage. The proposed system is formed by an ESD connected to a DC-bus through a bidirectional Buck-Boost converter, which is regulated by a Sliding-Mode Controller (SMC) to ensure the system stability in the entire operation range. The SMC drives the Buck-Boost charger-discharger to regulate the DC-bus voltage, at the desired reference value, by charging or discharging the ESD. This paper also provides detailed procedures to design the parameters of both the SMC and the charger-dischager. Finally, simulation and experimental results validate the proposed solution and illustrate its performance.
- Subjects
MICROGRIDS; ENERGY storage; ELECTRIC power production; ELECTRIC potential; SIMULATION methods &; models
- Publication
Energies (19961073), 2017, Vol 10, Issue 11, p1847
- ISSN
1996-1073
- Publication type
Article
- DOI
10.3390/en10111847