Juan M. Rey, pHD.
ASSISTANT PROFESSOR, UIS.
journal papers
This section presents some of my latest publications. If you have any questions or comments, or if you need a manuscript, do not hesitate to contact me. :)
More info in my Google Scholar profile
2024-2025
This work presents the design, implementation, and validation of an IoT system for an experimental laboratory microgrid developed at Universidad Industrial de Santander. The main design phases of the IoT system are described, beginning with the definition of requirements and extending through the component selection. Validation tests are proposed to verify the functionalities of the IoT system.
Authors: Jonathan Gómez, Juan M. Rey, Natalia Duarte, Iván Hernández, María A. Mantilla, and Oscar Quiroga.
Published in: IEEE Latin America Transactions, vol. 23, no. 1,pp. 25–35, 2025.
This paper proposes a flexible control strategy for three-phase multi-functional PV inverters. The proposal introduces two control parameters that can be adapted dynamically according to the inverter rated capacity and the load compensation requirements. This algorithm allows setting compensation objectives following a priority scheme in which the injection of the PV active power is prioritized. Reactive power compensation and load balancing functionalities are also considered at a lower level of hierarchical priority.
Authors: Fausto Osorio, Maria A. Mantilla, Juan M. Rey, Johann F. Petit
Published in: Energies 2024, 17, pp. 4218.
This paper reviews the most relevant recent literature on building occupancy estimation and prediction. A detailed description of the variables and design considerations is presented, including measurement methods, sensor selection, modeling techniques, evaluation metrics, and different applications.
Authors: Juan Caballero-Peña, German Osma-Pinto, Juan M. Rey, Shaival Nagarsheth, Nilson Henao, Kodjo Agbossou
Published in: Energy and Buildings, p. 114230, 2024.
This paper presents a secondary layer control strategy that does not require the use of communications to operate in isolated microgrids with unbalanced loads. The strategy guarantees proper performance in terms of power-sharing between the distributed generators of the microgrid.
Authors: Andrés Mauricio Salinas-Cala, Juan Manuel Rey-López, María Alejandra Mantilla-Villalobos
Published in: Revista UIS Ingeniería, vol. 23, no. 1, April 2024.
This article presents the theoretical and experimental validation of the modeling of a Permanent Magnet Synchronous Motor (PMSM) using the Field-Oriented Control (FOC) and the Six-Pulse Control.
Authors: Agustin Bucciarelli, Juan D. Duarte, Cristian De Angelo, Juan M. Rey and Oscar Quiroga
Published in: Revista Iberoamericana de Automática e Informática industrial, vol. 21, no. 2, Feb. 2024.
This paper proposes a three-phase estimation algorithm with high fidelity performance during abnormal grid conditions. The proposed algorithm combines a new Two-Sample Sequence Extractor (TSSE) and a Recursive Least Mean Square (RLMS) frequency estimator in a mutual feedback mode to improve its operation.
Authors: David J. Rincón, Wilmar A. Sotelo, María A. Mantilla, Juan M. Rey, and Reza Iravani.
Published in: International Journal of Electrical Power and Energy Systems, vol. 157, June 2024.
2022 - 2023
This paper presents an overview of flexible current control strategies applied to Low-Voltage Ride-Through (LVRT) capability. The paper is a concrete document focused on describing fundamental principles and operation features. Also, a general methodology to design this type of control strategies is presented.
Authors: David J. Rincon, Maria A. Mantilla, Juan M. Rey, Miguel Garnica, and Damien Guilbert.
Published in: Energies, vol. 16, no. 3, Jan. 2023.
Este documento presenta una revisión sobre el análisis del desempeño de microrredes, presentando la definición de capacidades y clasificación de métricas para este propósito.
Authors: J. García-García, Juan M. Rey, and G. Osma-Pinto.
Published in: TecnoLógicas, vol. 26, no. 58, Sep. 2023.
This paper proposes a microgrid sizing approach that integrates the life cycle assessment of the implementation and operation stages by adapting a multi-objective function inspired by the well-known life cycle assessment methodology called ReCiPe. For this purpose, information from several sources was compiled and adapted to quantify different environmental impacts in the sizing formulation.
Authors: Iván Jiménez-Vargas, Juan M. Rey, and German Osma.
Published in: Renewable Energy, vol. 202, pp. 554-565, Jan. 2023.
This paper aims to compare and analyze the impact of some of the most common tax incentives on microgrid projects’ financial feasibility: income tax deduction (ITD), accelerated depreciation (AD), vat exemption (VATE), and customs duty exemption (CDE). Such analysis is based on obtaining the cash flows and comparing financial indicators.
Authors: Jersson García-García, Yennifer Sarmiento-Ariza, Lizeth Campos-Rodríguez, Juan M. Rey, and German Osma.
Published in: Applied Energy, vol. 329, pp. 20293, Jan. 2023.
This paper presents a review of some laboratories and test systems of microgrids in Latin America. A brief description of the general information of each microgrid and its main characteristics and components are presented. Also, a discussion of the main advances in distributed generation in Latin America is included
Authors: Rey, J. M., Vera, G. A., Acevedo-Rueda, P., Solano, J., Mantilla, M. A., Llanos, J., & Sáez, D.
Published in: IEEE Latin America Transactions, Early Access.
This paper presents an evaluation of the impact of droop control over the sizing results of a solar/wind/battery/diesel microgrid. A case study is presented comparing an hourly optimized energy management scenario with multiple values of the droop control parameters. Simulations results indicate that a competitive total cost can be obtained if the droop parameters are calculated considering the microgrid sizing results. Based on this, a generalizable design methodology is presented.
Authors: Juan M.Rey, I. Jiménez-Vargas, P. P. Vergara, G. Osma-Pinto, and Javier Solano
Published in: International Journal of Electrical Power & Energy Systems, vol. 136, pp. 07634, May 2022.
2020 - 2021
This paper presents a droop-free hierarchical control strategy that satisfies a proper operation of AC microgrids. Control objectives such as power-sharing, frequency regulation, optimal power dispatch and voltage regulation are considered. Also, a closed-loop small-signal model, which facilitates the control parameters design and fills a gap in the literature is presented.
Authors: J. M. Rey, P. P. Vergara, M. Castilla, A. Camacho, M. Velasco, and P. Martí.
Published in: IET Power Electronics, vol. 13, no. 7, pp. 1403–1415, May 2020.
A major concern of the power quality in distributed systems is related to the mitigation of voltage imbalances. This paper presents a negative-sequence voltage elimination technique for distributed generators in grid-feeding operation mode. The proposal guarantees a complete elimination of the negative-sequence voltage, while operating without a priori in-depth knowledge of the grid configuration and its characteristics.
Authors: J. M. Rey, M. Castilla, J. Miret, M. Velasco, P. Martí, and E. Mojica-Nava.
Published in: IET Power Electronics, vol. 13,no. 9, pp. 1764–1774, July 2020.
Negative-sequence voltage elimination for distributed generators in grid-feeding operation mode [Open access]
Inspired in a resonant controller, this paper presents a dissonant-resonant controller for negative-sequence voltage elimination for a grid-feeding converter connected to the grid. The controller eliminates the negative-sequence voltage at the converter output with a regulable precision and does not require knowing the grid impedance for successful operation.
Authors: J. M. Rey, P. Martí, M. Velasco, J. Miret and M. Castilla.
Published in: IEEE Transactions on Industrial Electronics, vol. 64, no. 11, pp. 8534 - 8545, Nov. 2017.
This paper presents a simulation study to determine the influence of different energy management strategies (EMS) on the total costs of ownership (TCO) of fuel cell electric vehicles (FCEV).
Authors: C. Lorenzo, D. S. Mendoza, J. M. Rey, D. Bouquain, S. Hibon, D. Hissel, and J. Solano.
Published in: 2020 IEEE Vehicle Power and Propulsion Conference (VPPC), pp. 1–6, Gijon, Spain. Nov. 2020.
2018 - 2019
Reactive power injection in distributed generation inverters is an useful ancillary service for grid supporting purposes. This paper presents an adaptive slope voltage control which provides an improved transient performance, overcoming the limited dynamic properties that the static slope voltage control offers in scenarios with changing operation conditions.
Authors: J. M. Rey, M. Castilla, J. Miret, A. Camacho, and R. Guzman.
Published in: IEEE Transactions on Energy Conversion, vol. 34, no. 3, pp. 1644-1654, Sept. 2019.
In islanded microgrids, voltage source inverters working in parallel are expected to provide regulation of the local frequency while granting active power sharing. This paper presents a local control approach based on an event-driven operation of a parameter-varying filter. It ensures perfect active power sharing and controllable accuracy for frequency restoration without requiring the exchange of control data between inverters over the communication network.
Authors: J. M. Rey, C. X. Rosero, M. Velasco, P. Martí, J. Miret, and M. Castilla.
Published in: IEEE Transactions on Energy Conversion, vol. 34, no. 3, pp. 1232-1241, Sept. 2019.
This paper presents a distributed strategy for the optimal dispatch of unbalanced islanded microgrids. To set the dispatch an optimal generation problem is stated and solved distributively based on primal-dual constrained decomposition and a first-order consensus protocol. The microgrid operates with the standard hierarchical control, considering voltage control mode (droop control) and power control mode (setting the output powers) for the DG units operation.
Authors: P. P. Vergara, J. M. Rey, H. R. Shaker, J. M. Guerrero, B. N. Jørgensen, and L. C. P. da Silva.
Published in: IEEE Transactions on Smart Grid, vol. 10, no. 3, pp. 3210 - 3225, May 2019.
In this paper is presented a decentralized switched current control for DC microgrids. The microgrid is modeled considering DC–DC converters as controlled current sources instead of voltage sources in droop control schemes. The proposed current control consists of switching between two current reference signals while keeping the voltage level at the loads and with proper current distribution.
Authors: E. Mojica-Nava, J. M. Rey, J. Torres-Martinez, and M. Castilla.
Published in: IEEE Transactions on Industrial Electronics, vol. 66, no. 2, pp. 1182-1191, May 2018.
In this paper, a new and generalized model for the optimal operation of microgrids is presented. The proposed mathematical model considers both operational modes, either grid-connected and islanded modes. A mixed integer non-linear programming (MINLP) formulation is presented. Additionally, a set of convexification procedures are introduced in order to approximate the original MINLP model into a new convex formulation that can be solved using commercial solvers.
Authors: P. P. Vergara, J. M. Rey, J. C. López, L. C. P. da Silva, H. R. Shaker, and B. N. Jørgensen.
Published in: IEEE Transactions on Smart Grid, vol. 10, no. 5, pp. 5032-5045, Sept. 2019.
This paper presents a continuous control set model-predictive control with a receding horizon for a three-phase voltage-source inverter with an LCL filter. In this proposal, a reduced model of the converter with an embedded integrator and a Kalman filter are used. With the proposed method, active damping performances, a zero state error, and a reduction of the computational burden are achieved.
Authors: R. Guzman, J. L. Garcia de Vicuña, A. Camacho, J. Miret, and J. M. Rey.
Published in: IEEE Transactions on Industrial Electronics, vol. 66, no. 9, pp. 6671-6680, Sept. 2019.
2016 - 2017
Flexibility and reliability of AC microgrids are enhanced by reducing the dependence on communications in multilayer hierarchical control. This paper presents a secondary control with no communications for islanded microgrids. It is based on a control scheme that switches between two configurations according to a time-dependent protocol.
Authors: J. M. Rey, P. Martí, M. Velasco, J. Miret, and M. Castilla.
Published in: IEEE Transactions on Industrial Electronics, vol. 64, no. 11, pp. 8534 - 8545, Nov. 2017.
The selection of proper design criteria is essential to ensure reliability inthe sizing of hybrid PV/wind/battery systems. This study presents a comparative analysis of LPSP (loss of power supply probability) and LOLH (loss of load hours) design criteria based on a Monte Carlo simulation, taking into consideration uncertainties in the variables involved in the design process. Moreover, two new statistical design criteria are proposed, aiming to avoid oversizing of the optimal configuration.
Authors: P. P. Vergara, J. M. Rey, L. C Pereira da Silva, and G. Ordóñez.
Published in: IET Renewable Power Generation, vol. 11, no. 3, pp. 253 - 261, Feb. 2017.
This paper proposes a novel Energetic Macroscopic Representation (EMR) for PV generation systems considering the dynamic model, the variations in the irradiance and the temperature, and a maximum power point tracking (MPPT) algorithm for the control of the power converter.
Authors: J. Solano. J. Duarte, E. Vargas, J. Cabrera, A. Jácome, M. Botero and J. M. Rey.
Published in: International Journal of Emerging Electric Power Systems, vol. 17, no 5, pp. 575-582, Oct. 2016.
2014 - 2015
This paper discusses general concepts about design and operation of electrical microgrids. An operation analysis of a prototype is included considering load variations, storage systems performance indicators, energy balances and grid interactions.
Authors: J. M. Rey, P. P. Vergara, G. Osma and G. Ordóñez.
Published in: DYNA, Vol. 82, no. 192, pp. 109-119, Jul. 2015.
This paper presents a wind and solar energy resource assessment for the city of Bucaramanga (Colombia). It is based on the monitoring on four strategic points of the city during 2010-2012. Also, a methodology to analyze solar harvesting by sectors in the city, according to the solar motion and shadowing caused by existing structures is presented.
Authors: G. Ordóñez, G. Osma, P. Vergara and J. M. Rey.
Published in: IOP Conference Series: Materials Science and Engineering, vol. 59, pp. 1 - 6, 2014.
Wind and Solar Energy Potential Assessment for Development of Renewables Energies Applications in Bucaramanga, Colombia [Open access]
Evaluación del potencial solar y eólico del campus central de la Universidad Industrial de Santander y la ciudad de Bucaramanga, Colombia [Open access]
This paper presents an statistical analysis of the solar and wind potential at the central campus of the Industrial University of Santander and the city of Bucaramanga (Colombia). Characteristical parameters for the evaluation of the energy resources are obtained. An analysis of the PV and wind generation system implementation viability is presented.
Authors: P. P. Vergara, J. M. Rey, G. Osma and G. Ordóñez.
Published in: UIS Ingenierías, vol. 13, no. 2, pp. 49 - 57, 2014.
BOOK chapters
This chapter introduces concepts, characteristics, advantages and drawbacks of different secondary control approaches for islanded microgrids including centralized, distributed and communication-less techniques. Experimental demonstrations in a laboratory microgrid are presented.
Authors: J. M. Rey, J. Torres-Martínez, and M. Castilla.
Published in: Microgrids Design and Implementation. Springer, pp. 171–193, 2019.
This chapter introduces concepts to understand, formulate and solve a microgrid optimal sizing problem using different modeling approaches. The most common microgrid sizing criteria are presented, while basic concepts related to multi-objective optimization are introduced emphasizing into genetic algorithms.
Authors: J. M. Rey, P. P. Vergara, J. Solano, and G. Ordóñez.
Published in: Microgrids Design and Implementation. Springer, pp. 337–367, 2019.
This chapter introduces concepts about stability issues in microgrids. Stability classification in conventional power grids and the challenges emerging concerning stability in microgrids are discussed. A literature review focusing on stability impacts and control strategies to improve the stability of microgrids is presented.
Authors: J. Solano, J. M. Rey, J. D. Bastidas-Rodríguez, and A. I. Hernández.
Published in: Microgrids Design and Implementation. Springer, pp. 287–310, 2019.
In this chapter characteristics and functionalities of energy management systems for microgrids are introduced. The advantages and disadvantages of centralized and decentralized energy management system approaches are discussed. The most common methodologies and solution algorithms used in the specialized literature are reviewed.