Renewable Energies and Energy Efficiency Group – GEREE
The Renewable Energies and Energy Efficiency Group (GEREE) of the IDM at the Universitat Politècnica de València conducts applied research in power electronics, energy efficiency, power quality, renewable energy integration and intelligent energy management systems. Its work combines the design of power converters, advanced control algorithms, remote monitoring, energy storage, and data analysis to improve the performance, reliability, and sustainability of electrical and industrial installations.
The group’s activity has been consolidated through national and institutional competitive research projects, R&D contracts with companies, and international technology cooperation projects. Its main research lines include active compensation of electrical inefficiencies, digital control of converters, photovoltaic self-consumption with batteries, stand-alone solar water pumping and the application of IoT, machine learning and artificial intelligence techniques to energy management. This research has produced JCR-indexed publications, doctoral theses, registered transferable results, and protected software developments.
In recent years, GEREE has expanded its activity towards humanitarian engineering through photovoltaic water pumping systems with high-voltage batteries deployed in Kenya and Zimbabwe. It is also strengthening its technology transfer activity through the development of the university spin-off Smart Energy Flow, aimed at exploiting registered transferable results and bringing advanced energy management technologies to the market.
CV Prof. Francisco José Gimeno Sales
After beginning his professional career in industry in 1981, he joined the Universitat Politècnica de València (UPV) in 1993, bringing extensive experience in maintenance, development engineering, technology transfer and entrepreneurship. In 1998, he became Profesor Titular de Escuela Universitaria. During these years, he completed further training in power electronic systems and computer engineering, and in 2004, obtained his PhD in energy efficiency and power quality.
In 2009, he became Profesor Titular de Universidad. Since then, his academic career has combined applied research, teaching and industry collaboration. Within the Renewable Energies and Energy Efficiency Group (GEREE) of the IDM Institute, he has worked on power quality, renewable integration, data analysis, IoT sensing and AI applied to electrical networks. He has led numerous R&D contracts with companies, including HaaS and SaaS solutions based on AI. His challenge is consolidating a university spin-off to exploit registered transferable results and bring them to market.
Research Lines
Renewable energies .
Energetic efficiency.
Highlighted Funding
Greening humanitarian responses through enhanced Solar Energy harvesting. International Organization for Migration (IOM-UN). 2022-2025. Salvador Orts Grau
NEURON@EFICIENCIA. SPINUPV2025/L2/05. Universitat Politécnica de Valencia (UPV). 2025-2026. Francisco José Gimeno Sales
Sistemas de Compensación Activa para el Ahorro Energético y la Mejora de la Calidad del Suministro Eléctrico. DPI2011-28606. Ministerio de Ciencia e Innovación. 2012-2014. Salvador Orts Grau
Caracterización de Sistemas Sostenibles para el Bombeo de Agua para Consumo Humano en Regiones en Desarrollo y/o Campos de Refugiados en Kenia Mediante la Implantación de Sistemas Fotovoltaicos Aislados con Baterías de Ion Litio de Nueva Generación. AD1707. Universitat Politécnica de Valencia (UPV). 2018-2019. Salvador Orts Grau.
Desarrollo de un Prototipo de Inversor Trifásico de Conexión a Red Eléctrica (PROFIT Energía 2007). Juan y David Bornay, S.L. Bornay Aerogeneradores S.L.U. 2007-2010. Francisco José Gimeno Sales.
Desarrollo de un Sistema para la Modelización de Generadores de Minieolica. Bornay Aerogeneradores S.L.U. 2016-2017. Francisco José Gimeno Sales
Desarrollo de un Filtro Activo de 10KVA. Transformadores Jesiva, S.L. 2021-202. Salvador Orts Grau
Implementación de Prototipos de Filtro Activo de 10KVA que Posteriormente Pueda Escalarse a Diferentes Potencias. Elecgy Solutions, S.L. 2018-2019. Francisco José Gimeno Sales
Sistema Electrónico Local de Generación y Compensación Distribuida de 30 KW. GV/2011/087. Generalitat Valenciana (GVA). 2011-2013. Francisco José Gimeno Sales
Highlighted Publications
Garrido-Sarasol, J.A.; Orts-Grau, S.; Gasque, M. et al. Analysis of the efficiency, performance, and operational capacity of a high-voltage battery in an autonomous photovoltaic system for water supply. Journal of Energy Storage. 2026. 161, 121822. https://doi.org/10.1016/j.est.2026.121822
Orts-Grau, S.; Alfonso-Gil J.C.; Balaguer-Herrero, P. et al. Generalized one-cycle current controller for improved SAPF power quality management. International Journal of Electrical Power & Energy Systems. 2024. 157, 109833. https://doi.org/10.1016/j.ijepes.2024.109833
Garrido-Sarasol, J.A.; Orts-Grau, S.; Gasque, M. et al. Technical performance analysis of high-voltage battery-based photovoltaic water pumping systems. Energy Conversion and Management: X. 2024. 22, 100543. https://doi.org/10.1016/j.ecmx.2024.100543
Orts-Grau, S.; González-Altozano, P.; Gimeno-Sales, F.J. et al. Photovoltaic Water Pumping: Comparison Between Direct and Lithium Battery Solutions. IEEE Access. 2021. 9, 101147-101163. https://doi.org/10.1109/ACCESS.2021.3097246
Martínez-Navarro, G.; Orts-Grau, S. Selective SAPF for Harmonic and Interharmonic Compensation Using an Adaptive Kalman Filter-Based Identification Method. Applied Sciences. 2025. 15, 22, 12249. https://doi.org/10.3390/app152212249
Martínez-Navarro, G.; Orts-Grau, S.r; Alfonso-Gil, J.C. et al. Synchronized Measurement of the Fundamental Voltage and Harmonic, Interharmonic, and Subharmonic Components of the Electrical Grid Using an Adaptive Kalman Filter. Applied Sciences. 2024. 14(19), 8669. https://doi.org/10.3390/app14198669
Gasque, M.; González-Altozano, P.; Gimeno-Sales, F.J. et al. Energy Efficiency Optimization in Battery-Based Photovoltaic Pumping Schemes. IEEE Access. 2022. 10, 54064-54078. https://doi.org/10.1109/ACCESS.2022.3175586
Orts-Grau, S.; Balaguer-Herrero, P.; Alfonso-Gil, J. et al. Switching Pattern Improvement for One-Cycle Zero-Integral-Error Current Controller. IEEE Access. 2022. 10, 158-167. https://doi.org/10.1109/ACCESS.2021.3137758
Balaguer-Herrero, P.; Alfonso-Gil, J.C.; Martínez-Márquez, C.I. et al. Two-Scale Model Predictive Control for Resource Optimization Problems With Switched Decisions. IEEE Access. 2022. 10, 57824-57834. https://doi.org/10.1109/ACCESS.2022.3178846
Prof. Salvador Orts Grau
Prof. Salvador Seguí Chilet
Prof. María Gasque Albalate
Prof. Germán Martínez Navarro