Abstract
Due to low system inertia in microgrids, frequencies may vary rapidly from the nominal value, leading to the complete blackout of the system unless there is an adequate spinning reserve available for balancing the supply with the demand load. This issue of instability in microgrids under islanded operation has attracted particular attention recently. A diesel generator is considered to be an ideal spinning reserve to provide back-up power to the load along with the renewable energy source in islanded system. However, the high maintenance cost and CO2 emissions of diesel generator are detrimental factors which have inspired searches for more cost effective and cleaner technologies. The integration of an energy storage system (ESS) in islanded system along with generator not only reduces generator maintenance costs but also reduces the CO2 emissions by limiting its operating hours. This paper proposes an islanded PV hybrid microgrid system (PVHMS) utilizing flywheel energy storage systems (FESS) as an alternative to battery technology to support the PV system and meet the peak demand of a small residential town with 100 dwellings. The diesel generator is used in the islanded system as a spinning reserve to maintain the stability of the islanded system when the PV system and flywheel storage cannot meet the load demand. Results of analysis of such a system demonstrate that flywheel energy storage technology of appropriate size offers a viable solution to support the operation of the standalone PV system. Furthermore, the reduction in CO2 emissions and fuel consumption has been quantified as compared with the case with flywheel energy storage systems which means the diesel generator but always be operating.
Highlights
Approaches to power generation for satisfying consumption have recently been changed due to increased energy demand, challenging targets of cutting carbon footprints and effects of climate change [1]
The simulated results of PVHM model integrated with residential load are analyzed
The performance of the system for load profiles of different patterns is tested by analyzing power outputs of the diesel generator (DGen), the flywheel energy storage systems (FESS)
Summary
Approaches to power generation for satisfying consumption have recently been changed due to increased energy demand, challenging targets of cutting carbon footprints and effects of climate change [1]. The growing demand for energy from existing national and micro electrical grids has led electricity suppliers to search for new sources of electric power production and update the existing electrical infrastructure [2]. RES such as wind and solar, can cause frequency deviations due to their unpredictable power production when integrated into microgrids. Lack of active power in microgrids makes frequency control more difficult than in conventional national grids which are larger so the effect of individual load changes is smaller. Due to the mismatch between electric power supply and the load demand, the frequency of the microgrid will swing and it may fluctuate rapidly due to the low inertia present in the microgrid. If the imbalance is large, complete failure may occur in the form
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
