N.F. Guerrero-Rodríguez

• PhD
• Professor at Pontificia Universidad Católica Madre y Maestra

In this study, a new compact “hot-box” prototype with a volume of 0.602 m³ has been designed, instrumented, and implemented to experimentally characterize the thermal conductivity of specimens measuring 25 cm × 25 cm, with the thickness of the specimen varying up to a maximum of 10 cm. The prototype features a novel design aimed at enhancing flexib...

The introduction of renewable energy sources, distributed energy systems, and power electronics equipment has led to the emergence of the Smart Grid. However, these developments have also caused the worsening of power quality. Selecting the correct sampling frequency and feature extraction techniques are essential for appropriately analyzing power...

In this study, a new compact "hot box" prototype (experimental cell) with a volume of 0.602 m³ has been designed, instrumented, and implemented to experimentally characterize the thermal conductivity of specimens measuring 25 cm x 25 cm, with the thickness of the specimen varying up to a maximum of 10 cm. The prototype features a novel design aimed...

This work shows the design and validation of a Shunt Active Power Filters (SAPF) using Controller Hardware-In-the-Loop (CHIL) Simulations by using a OP5707XG Real-Time Simulator module provided by OPAL-RT, an external OP8666 controller, a host PC and an oscilloscope for visualization. A novel methodology for the modelling of real non-linear electri...

Solar radiation is a fundamental parameter for solar photovoltaic (PV) technology. Reliable solar radiation prediction has become valuable for designing solar PV systems, guaranteeing their performance, operational efficiency, safety in operations, grid dispatchment, and financial planning. However, high quality ground-based solar radiation measure...

Solar radiation corresponds to fundamental parameters for solar photovoltaic (PV) technology. Reliable solar radiation prediction became valuable to design solar PV systems, performance, operatively efficient planning, safety operation, grid dispatch and financial characteristics. However, high quality ground-based solar radiation measurements are...

This work studies the efficiency and long-term viability of powered hydrogen production. For this purpose, a detailed exploration of hydrogen production techniques has been undertaken, involving data collection, information authentication, data organization, and analysis. The efficiency trends, environmental impact, and hydrogen production costs in...

There are important challenges in modeling large electrical distribution circuits, especially with the presence of distributed renewable generation. Constructing simulations to assess the effect of the penetration of distributed generation on electrical distribution networks has become of great importance for Distribution Network Operators (DNOs)....

Debido a la necesidad de encontrar soluciones sostenibles que minimicen el impacto ambiental ocasionado por procesos que utilizan combustibles fósiles, las tecnologías de suministro de energía eléctrica a partir de fuentes renovables han surgido como alternativas a los sistemas de generación convencionales. En consecuencia, el enfoque se ha desplaz...

Los dispositivos electrónicos modernos se han visto caracterizado por su pequeño tamaño y la búsqueda del aumento de la densidad de energía eléctrica disponibles en los mismos. Estas tendencias se han visto fundamentadas en las aplicaciones de los dispositivos de electrónica de potencia. Sin embargo, a causa de su operación conmutada y comportamien...

El incremento sostenido de la penetración de paneles fotovoltaicos (PV) en la red de generación distribuida y microrredes, ha presentado retos en la optimización del aprovechamiento de la energía solar. La disparidad entre la curva de producción energética de los generadores PV y la curva del consumo eléctrico de la red es una de las principales ca...

Adapting new buildings to emerging construction techniques requires a phase of learning and demonstration of their environmental, social, and economic benefits, especially in countries where traditional construction solutions predominantly rely on a single option, such as concrete blocks, as is the case in the Dominican Republic. This research prop...

There are important challenges for modeling large electrical distribution circuits, even more with the presence of distributed renewable generation. Constructing simulations for assessing the effect of the penetration of distributed generation on electrical distribution networks has become of great importance for Distribution Network Operators (DNO...

This paper describes research on the harmonic-distortion capacity of a single-stage photovoltaic (PV) 3.68 kWp generator in a microgrid configuration. An overview of various harmonic compensator methods used in PV generators is presented to evaluate their advantages and disadvantages. Proportional-resonant (PR) structures with harmonic compensators...

La integración en la red eléctrica de generadores fotovoltaicos (PV) ha obligado a desarrollar e incorporar sistemas acondicionadores de potencia para que estos logren cumplir con los estándares sobre calidad de la energía. Estos acondicionadores de potencia requieren de algoritmos de control sofisticados para alcanzar la mayor eficiencia de los ge...

A total of 1210 new condensation friction pressure gradient points (database) is collected from 12 open articles on mini/micro-channels literature. The database covered a wide range of thermophysical properties associated with low-GWP refrigerants, physical dimension, mass velocity and vapor quality. A comparison of the experimental database agains...

IMPLEMENTACIÓN DE ESTRUCTURAS DE CONTROL BASADAS EN FILTROS RESONANTES PARA MITIGAR ARMÓNICOS EN LAS CORRIENTES DE INVERSORES CONECTADOS A RED Implementación de estructuras de control basadas en Filtros Resonantes para mitigar armónicos en las corrientes de inversores conectados a red

En este trabajo, se reporta una nueva base de datos de puntos de calidad de caída de presión por fricción durante el proceso de condensación. La base de datos se ha coleccionado de 16 artículo científico de la literatura especializada flujo multifásico en el orden de la mini/microescala. La base de datos captura un amplio rango de propiedades termo...

Pontificia Universidad Católica Madre y Maestra, Facultad de Ciencias e Ingeniería nf.guerrero@ce.pucmm.edu.do* Modelado y simulación de un generador fotovoltaico PV de 7kWp conectado a red para la evaluar algoritmos de control Dado a que los generadores fotovoltaicos conectados a red deben de cumplir con estándares de calidad de la energía como e...

En orden de cumplir con los estándares y recomendaciones de buenas prácticas relacionadas a la generación y el consumo de energía eléctrica, la calidad de la energía constituye un aspecto de gran importancia al momento de determinar las características de la energía eléctrica. Por lo anterior, en este trabajo se presenta una metodología para analiz...

The uninterruptible operation of grid-connected renewables under the occurrence of grid voltage sags is addressed in this work. This is achieved due to the incorporation of an enhanced control algorithm of a renewable source. The low-voltage ride-through algorithm was developed in accordance to the voltage profile introduced by IEC 61400-21 regardi...

The high cost of energy consumption in buildings highlights the importance of research focused on improving the energy efficiency of building’s envelope systems. It is important to characterize the real behavior of these systems to know the effectiveness in terms of energy reduction. Therefore, the aim of this paper is to characterize the thermal p...

The use of devices based on power electronics has been widely spread to improve the transmission lines performance. However, the inclusion of these compensators, named Flexible AC Transmission Systems, produces adverse effects on conventional protection schemes. For instance, it modifies the apparent impedance of transmission lines. This condition...

p>En el presente artículo se propone un modelo para caracterizar las variación de corriente en terminales de un motor síncrono de imanes permanentes (MSIP) como consecuencia del efecto de desbalance en el rotor a causa de una grieta superficial. Se modela el desbalance en el rotor mediante las ecuaciones de Laval con acoplamiento del efecto de la g...

The low-voltage ride-through service is carried out in this paper according to the voltage profile described by the IEC 61400-21 European normative when short-duration voltage sags happen, and some instantaneous reactive power is delivered to the grid in accordance with the Spanish grid code; the mandatory limitation of the amplitude of the three-p...

This article deals with the vector control in dq axes of a three-phase grid-connected photovoltaic system with single-stage topology and low-voltage-ride-through capability. The photovoltaic generator is built using an array of several series-parallel Suntech PV modules and is modeled as a Lookup Table (two-dimensional; 2-D). The requirements adopt...

En los sistemas de agentes renovables, la validación de nuevos algoritmos de control a utilizar en inversores de instalaciones conectadas a la red eléctrica presenta fuertes restricciones asociadas con los altos costes de los agentes renovables, la fragilidad del sistema, limitación en los tipos y cantidad de pruebas a realizar bajo distintos escen...

This paper is about the control of Modular multilevel converters, an innovative technology in the design of converters, which is beginning to be included in real installations. Papers about this topic include simulation models, circulating current reduction, voltage modulators, capacitor voltage balancing and control issues. The scheme for current...

This paper describes an algorithm to detect, localize and classify fault events in overhead transmission lines compensated with a thyristor-controlled series capacitor (TCSC). During a fault event, a complex pattern of traveling wave reflections and refractions is generated at the point of fault inception. The proposed algorithm uses the discrete w...

En este trabajo, se hace una evaluación de dos algoritmos de sincronización utilizados en inversores trifásicos para generadores fotovoltaicos conectado a la red eléctrica trifásica de baja tensión. Con el objetivo de observar el comportamiento de los dos algoritmos de sincronización, se introducirán desequilibrios de tensión, contaminación armónic...

En el presente proyecto de investigación se analizarán los distintos dispositivos que permitan una comunicación con los Smart Meters (medidores inteligentes), y la gestión de una base de datos empotrada, de igual manera que faciliten el desarrollo de software y aplicaciones lo que permitirá una comunicación y sincronización entre dispositivos móvil...

In this paper, an overview of grid-connected renewable systems is presented, then two current-control strategies for 3-phase grid-connected inverters are analyzed: firstly, the well-known d-q control in the rotating synchronous reference frame (d-q axes) using Proportional Integral regulators is described, and secondly, the Proportional Resonant co...

Este trabajo está enfocado en mejorar la calidad de la energía inyectada a la red por sistemas fotovoltaicos reduciendo la Tasa de Distorsión Armónica (THD) total de las corrientes de línea. Un modelo de un generador fotovoltaico ha sido creado y conectado al modelo de una red eléctrica trifásica afectada por armónicos de baja frecuencia. Con el ob...

This paper presents five synchronization algorithms that are commonly used in grid-connected renewable systems. The algorithm structures are studied and their corresponding block diagrams are shown and explained in detail. The behaviors of the algorithms are studied according of their response under voltage unbalances, frequency variations and low-...

En este trabajo de investigación se analizaron con detalle diversas estrategias de control para inversores trifásicos utilizados en sistemas fotovoltaicos conectados a red. Como caso de estudio, se ha modelado una red eléctrica trifásica de baja tensión y un generador fotovoltaico que se conecta a dicha red a través de un inversor trifásico. Las di...

* N.F. Guerrero-Rodríguez 1 y J. G. Faxas-Guzmán 1 1 Pontificia Universidad Católica Madre y Maestra, Facultad de Ciencias de las Ingenierías * nestorguerrero00@gmail.com Este artículo presenta un estudio sobre el efecto que tienen los algoritmos de sincronización en la mitigación de la distorsión armónica de las corrientes de línea de los invers...

In this paper, an implementation of the control and the synchronization algorithms for a Voltage Source Inverter used as the power conditioner for Photovoltaic renewable energy in a grid-connected structure is carried out. Its main purpose is to show, in a simple manner, the design and combined operation of the control and synchronization algorithm...

In this paper, an implementation of the control and the synchronization algorithms for a Voltage Source Inverter used as the power conditioner for Photovoltaic renewable energy in a grid-connected structure is carried out. Its main purpose is to show, in a simple manner, the design and combined operation of the control and synchronization algorithm...

In a distributed generation (DG) system, several renewable agents are connected to the low-voltage 3-phase utility grid through an inverter which is used as power condition and must guarantee the higher efficiency of the renewable agent. To attain this level of efficiency, a unitary power factor (FP) between the inverter currents and the utility gr...

In this paper, an adaptive-frequency Harmonic-Compensation structure for a Voltage Source Inverter used in a 3-phase grid-connected Photovoltaic system is presented. The main purpose is to show the frequency adaptation of the used control algorithm in order to improve the compensation of the low-order utility grid current harmonics when frequency v...

Throughout decades, the electric power demand has been rising due to the growth of the industrial sector and transportation, and the development of new technologies that require more energy together with the increase of the global population have led to a higher fuel demand needed for the electric energy generation. The global energy consumption in...

The large number of Photovoltaic plants and its utilization as agents of a Distributed Generation Systems justified the increasing efforts towards the optimal design of the overall grid-connected System. In a Distributed Generation environment the low voltage 3-phase utility grid could be affected by some disturbances such as voltage unbalanced, va...

This paper presents a review of several synchronization algorithms used in Grid-Connected Renewable Agents. Different synchronization algorithm structures will be shown and their advantages and disadvantages will be discussed using MATLAB/SIMULINK tool from The MathWorks, Inc. Some simulations will be shown firstly, and secondly, a Real Time Digita...

This paper presents a review of several synchronization algorithms used in Grid-Connected Renewable Agents. Different synchronization algorithm structures will be shown and their advantages and disadvantages will be discussed using MATLAB/SIMULINK tool from The MathWorks, Inc. Some simulations will be shown firstly, and secondly, a Real Time Digita...

The purpose in this paper is to design the vector control algorithm for a voltage source inverter (VSI) that will be used as a power conditioner and link between the Photovoltaic (PV) agent as the primary renewable energy source and the low voltage 3-phase utility grid. The vector control algorithm must be able to regulate the instantaneous active...

The aim in this paper is the implementation of a vector controller for a voltage source inverter used as a power conditioner and link between the primary renewable energy source and the low voltage 3-phase utility grid. The strategy employed for the vector control of the 3-phase inverter will be a d-q control. The primary renewable energy sources m...