A4 Refereed article in a conference publication
Improvements in Frequency Control of an AC Microgrid by Means of Micro-Hydropower Combined Flow-Reduced Dump Load Control Method
Authors: Peña-Pupo, Leonardo; Martínez-García, Herminio; García-Vílchez, Encarna; Domínguez-Abreu, Hugo; Fariñas-Wong, Ernesto Y.
Conference name: International Conference on Renewable Energies and Power Quality
Publisher: UK Zhende Publishing Limited
Publication year: 2022
Journal: Renewable energy & power quality journal
Book title : 20th International Conference on Renewable Energies and Power Quality (ICREPQ’22)
Volume: 20
Issue: 4
eISSN: 2172-038X
DOI: https://doi.org/10.24084/REPQJ20.350
Publication's open availability at the time of reporting: Open Access
Publication channel's open availability : Open Access publication channel
Web address : https://doi.org/10.24084/REPQJ20.350
Load Frequency Control (LFC) is an issue of top importance to ensure microgrids (MGs) safe and reliable operation in AC MGs. Primary frequency control of each energy source can be guaranteed in AC MGs in order to integrate other energy sources. This paper proposes a micro-hydro frequency control scheme, combining the control of a reduced dump load and the nozzle flow control of Pelton turbines operating in isolated from electricity grid. Some researchs have reported the integration of dump load and flow control methods, but they did not reduce the dump load value and adjust the nozzle flow linearly to the power value demanded by users, causing the inefficient use of water. Simulation results were obtained in Matlab®/Simulink® using models obtained from previous research and proven by means of experimental studies. The simulation of the proposed scheme shows that instantaneous frequency variation is about 2 % even for perturbations magnitude up to 12 %. The validation result shows a 60 % reduction in overshoot and settling time of frequency temporal behaviour operating the micro-hydro autonomously.
Funding information in the publication:
This research was funded by MCIN/ AEI /10.13039/501100011033/ and by ERDF. ERDF a way of making Europe thanks to grant PGC2018‐098946‐B‐I00. The authors would like to thank financial support byGrant PGC2018-098946-B-I00 funded by: MCIN/AEI /10.13039/501100011033/ and by ERDF A way of making Europe. Authors also would like to thanks to IRIS 2019-2022 project (Cuban energy transformation integration of renewable intermittent sources in the power systems) funded by Academy of Finland. Grant/Award Number 320229.
