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Performance Assessment of an Energy Management System for a Home Microgrid with PV Generation

Elkazaz, Mahmoud; Sumner, Mark; Pholboon, Seksak; Davies, Richard; Thomas, David

Authors

Mahmoud Elkazaz

MARK SUMNER mark.sumner@nottingham.ac.uk
Professor of Electrical Energy Systems

Seksak Pholboon

DAVID THOMAS dave.thomas@nottingham.ac.uk
Professor of Electromagnetics Applications



Abstract

Home energy management systems (HEMS) are a key technology for managing future electricity distribution systems as they can shift household electricity usage away from peak consumption times and can reduce the amount of local generation penetrating into the wider distribution system. In doing this they can also provide significant cost savings to domestic electricity users. This paper studies a HEMS which minimizes the daily energy costs, reduces energy lost to the utility, and improves photovoltaic (PV) self-consumption by controlling a home battery storage system (HBSS). The study assesses factors such as the overnight charging level, forecasting uncertainty, control sample time and tariff policy. Two management strategies have been used to control the HBSS; (1) a HEMS based on a real-time controller (RTC) and (2) a HEMS based on a model predictive controller (MPC). Several methods have been developed for home demand energy forecasting and PV generation forecasting and their impact on the HEMS is assessed. The influence of changing the battery’s capacity and the PV system size on the energy costs and the lost energy are also evaluated. A significant reduction in energy costs and energy lost to the utility can be achieved by combining a suitable overnight charging level, an appropriate sample time, and an accurate forecasting tool. The HEMS has been implemented on an experimental house emulation system to demonstrate it can operate in real-time.

Journal Article Type Article
Publication Date Jul 3, 2020
Journal Energies
Publisher MDPI
Peer Reviewed Peer Reviewed
Volume 13
Issue 13
Article Number 3436
APA6 Citation Elkazaz, M., Sumner, M., Pholboon, S., Davies, R., & Thomas, D. (2020). Performance Assessment of an Energy Management System for a Home Microgrid with PV Generation. Energies, 13(13), https://doi.org/10.3390/en13133436
DOI https://doi.org/10.3390/en13133436
Keywords General Computer Science
Publisher URL https://www.mdpi.com/1996-1073/13/13/3436

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