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Hybrid Solar PV–Hydro Controller for an Autonomous DC Microgrid

Article scientifique 2023 Anglais

Résumé

Abstract A control method for an off-grid hybrid DC microgrid that consists of solar PV and pumped hydro storage was developed to provide sustainable, reliable, flexible and accessible energy. The developed off-grid DC microgrid system (DCMGS) consists of a solar PV system of 100 kWp as a distributed energy resource and a pumped hydro storage system as energy storage system (ESS). An energy management system (EMS) was developed using a fuzzy logic controller (FLC) in the MATLAB/Simulink environment. The pumped hydro storage system (PHSS) is used as an ESS to improve the DCMGS stability and also operates as a backup power system. A load shedding scheme is part of the system to bring support to the supply by automatically disconnecting or re-connecting the secondary load to ensure reliability and continuous supply of power to the primary load and secondary load based on the available power and the water level in the reservoir. A DC-DC boost converter connects the solar PV to the rest of the DCMGS thereby improving the quality of power generated and allow the flow of power in the system. The performance analysis of the research design considered the intermittent power supply of the solar PV and the flexibility of the load demand under different circumstances and time of the day. The results showed that the adopted EMS ensured DC microgrid stability, improved reliability, increased system flexibility and effective power distribution. Again, the developed algorithm provided adequate power distribution between the solar PV and the PHSS and maintained the charging and discharging of the reservoir within acceptable level. The PHSS was able to augment power shortage in the system based on the different scenarios that were implemented. The developed EMS also provides an opportunity to remodel and change any parameter within the DCMGS.

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Nkundukize, P., Adonis, M. (2023). Hybrid Solar PV–Hydro Controller for an Autonomous DC Microgrid. https://doi.org/10.21203/rs.3.rs-3213757/v1

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Auteur(s)

Prime Nkundukize Marco Adonis

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