Efrain Bernal A.

Efrain Bernal A.
Universidad de La Salle · Facultad de Ingeniería

Dr.-Ing.

About

34
Publications
6,920
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85
Citations
Introduction
Efrain Bernal currently works at the engineering faculty of La Salle University, Universidad de La Salle, Colombia. Efrain does research in the field of renewable energy, microgrids, smart grids, smart wireless sensor networks, IoT. Their current project is science and technology for rural development.

Publications

Publications (34)
Book
Full-text available
Colombia, consciente de la importancia en el cumplimiento de los ods, los monitorea de forma constante e incluye, en los diferentes planes de desarrollo, mecanismos y estrategias que sean garantes del cumplimiento de cada uno de ellos. La Facultad de Ingeniería de la Universidad de La Salle define cuatro áreas de énfasis y de trabajo, las cuales ay...
Article
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Opciones de utilización de residuos de construcción y demolición-RCD en la infraestructura vial
Article
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The use of Renewable Power Generation brings new challenges related to power quality issues. Furthermore, with the changing power system nature due to the presence of new components such as power electronics in large numbers and distributed generation systems, the tools used for more than a century to analyze signals in this type of systems are no...
Chapter
Distribution electrical power systems are routinely designed and built to resist a variety of natural disruptions and continue to operate. However, if terrorist attacks targeted massive components such as smart meters, attackers can bypass traditional anomaly detection tests and influence negatively the stability of the system. In this paper, a nov...
Article
El presente artículo tiene como objetivo presentar algunos lineamientos para la transformación digital de la Universidad de La Salle, teniendo como contexto la definición del Plan Institucional de Desarrollo 2021-2026: “Una universidad innovadora para la transformación social y productiva del país”, y los paradigmas que producen las tecnologías con...
Article
Full-text available
Colombia has close of 6.5 million people or 13% of the population still use traditional solid fuels for cooking. The goal of this paper is to determine the main socioeconomic factors that conducting the cooking fuel preferences of Colombian households during the years 2010 to 2016. We developed a theoretical framework based on cooking fuel preferen...
Chapter
Full-text available
This paper describes the development and implementation of a methodology for the signal analysis in non-conventional energy systems. The proposed methodology involves the Hilbert-Huang transform supported by Empirical Mode Decomposition (EMD) to decompose one signal in its intrinsic mode function (IMF). A computational tool designed in MATLAB is us...
Presentation
Full-text available
This presentation aims to develop a combination method for the evaluation of power quality disturbances. First, we apply the Fast Fourier Transform, Wavelet Transform and Hilbert Huang Transform on a synthetic signal that represents typical behavior in a power system with high penetration of Renewable Energies. Then, we combine the methods to extra...
Conference Paper
Full-text available
This paper aims to develop a combination method for the evaluation of power quality disturbances. First, we apply the Fast Fourier Transform, Wavelet Transform and Hilbert Huang Transform on a synthetic signal that represents typical behavior in a power system with high penetration of Renewable Energies. Then, we combine the methods to extract the...
Presentation
Full-text available
This presentation describes the development and implementation of a methodology for the signal analysis in non-conventional energy systems. The proposed methodology involves the Hilbert-Huang transform supported by Empirical Mode Decomposition (EMD) to decompose one signal in its intrinsic mode function (IMF). A computational tool designed in MATLA...
Article
Full-text available
In this paper, a novel distribution system state estimation method based on the information provided by smart meters to support coordinated voltage control strategies in real time is presented. Because the measurement redundancy in a distribution system is very low compared with the transmission system, the proposed method is able to mitigate the e...
Preprint
Full-text available
Distribution electrical power systems are routinely designed and built to resist a variety of natural disruptions and continue to operate. However, if terrorist attacks targeted massive components such as smart meters, attackers can bypass traditional anomaly detection tests and influence negatively the stability of the system. In this paper, a nov...
Article
Full-text available
This paper attempts an understanding of the use of stock electrical appliances in the city of Bogot´a D.C. We developed a methodology based on Colombia’s National Quality of Life (NQL) 2016, the methodology uses a questionnaire survey focused on information related to: type of residential building, appliances stock, socioeconomic status and income,...
Article
Full-text available
The importance of implementing solar generation systems in rural areas in Colombia lies not only in providing access to the electric power population, but also in the use of current technologies to enhance their socioeconomic growth. The difficulties for its realization lie in technical limitations and access to the site, preventing mayors, heads o...
Article
La importancia de implementar sistemas de generación solar fotovoltaica en zonas rurales en Colombia radica no solo en brindar acceso a la población de energía eléctrica, sino también en el aprovechamiento de las tecnologías actuales para potenciar su crecimiento socioeconómico. Las dificultades para su realización radican en limitantes técnicas y...
Article
Full-text available
La importancia de implementar sistemas de generación solar fotovoltaica en zonas rurales en Colombia radica no solo en brindar acceso a la población de energía eléctrica, sino también en el aprovechamiento de las tecnologías actuales para potenciar su crecimiento socioeconómico. Las dificultades para su realización radican en limitantes técnicas y...
Article
Full-text available
Analysis of difficulties and issues related to the design, construction, transportation, installation and operation of two single-blade wind turbines type as part of a hybrid project to supply electrical energy to an isolated rural community in northern of Colombia are discussed in this paper. This study modeling aerodynamic forces, as well as the...
Article
Full-text available
Analysis of difficulties and issues related to the design, construction, transportation, installation and operation of two single-blade wind turbines type as part of a hybrid project to supply electrical energy to an isolated rural community in northern of Colombia are discussed in this paper. This study modeling aerodynamic forces, as well as the...
Article
Full-text available
Resumen-Este trabajo presenta el diseño e implementación de un prototipo de control de temperatura de un reactor UASB para el tratamiento de aguas residuales industriales, utilizando como fuente de energía alterna la combustión del biogás que se produce en este reactor, hasta ahora desaprovechado, para reemplazar el suministro de energía externa de...
Conference Paper
Full-text available
High reactive power fluctuations in LowVoltage (LV) distribution systems may negatively impact the power quality of the electrical network in a variety of ways. In this paper, a novel multi-objective optimal power flow (OPF) formulation is developed to smooth the reactive power fluctuations caused by PV inverters in central voltage-control strategi...
Conference Paper
Full-text available
High reactive power fluctuations in LowVoltage (LV) distribution systems may negatively impact the power quality of the electrical network in a variety of ways. In this paper, a novel multi-objective optimal power flow (OPF) formulation is developed to smooth the reactive power fluctuations caused by photovoltaic (PV) inverters in central voltage-c...
Conference Paper
Full-text available
With the inclusion of Information and Communication Technology (ICT) components into the low-voltage (LV) distribution grid, some measurement data from smart meters are available for the control of the distribution networks with high penetration of photovoltaic systems (PV). This paper undertakes a decentralized voltage-control strategy for smart L...
Thesis
Due to the high penetration of renewable distributed energy resources (DERs) into low-voltage distribution grids, particularly residential photovoltaic (PV) systems, a renewed interest in voltagecontrol strategies arises in the recent years. Although voltage-control strategies based on reactive power produced by smart PV inverters are a well develo...
Presentation
Full-text available
Slides presented in the IFAC 2017 for the paper ”Based Reactive Power Control for Smart PV Inverters in LV Distribution Systems”
Conference Paper
Full-text available
Future society entails new paradigms in how the world will work; new ideas as Smart Grid, Smart Cities, Smart Homes, and their interactions have been established and studied. With the inclusion of Information and Communication Technology (ICT) components into the low-voltage (LV) distribution grid, some measurement signals from smart meters are ava...
Article
Future society entails new paradigms in how the world will work; new ideas as Smart Grid, Smart Cities, Smart Homes, and their interactions have been established and studied. With the inclusion of Information and Communication Technology (ICT) components into the low-voltage (LV) distribution grid, some measurement signals from smart meters are ava...
Conference Paper
With the inclusion of Information and Communication Technology (ICT) components into the low-voltage (LV) distribution grid, some measurement data from smart meters are available for the control of the distribution networks with high penetration of photovoltaic (PV). This paper undertakes a central voltage-control strategy for smart LV distribution...
Article
Full-text available
In the case of low voltage (LV) distribution networks, the inclusion of smart homes is expected to increase the systems complexity due to multiplicity of interacting users with autonomous use of energy and the highly penetration of photovoltaic (PV). Consequently, the shift towards smart LV distribution systems implies that the traditional unidirec...
Conference Paper
Full-text available
The penetration level of both photovoltaic and home automation systems is expected to increase in the short-term future in Germany and their combination will undoubtedly have some effect on the low-voltage grid. This study outlines the development of a high-resolution smart home power demand model taking into account the activity patterns of indivi...
Conference Paper
Full-text available
In this paper, a development of ECG monitoring system for clinical and non-clinical environments is proposed. The prototype performs the tasks of general ECG monitoring, like detection and alarm generation for Tachycardia, bradycardia, acute myocardial infarction and ventricular fibrillation. It exposes features like real-time processing, long term...

Questions

Question (1)
Question
I want to regulate the power production of a variable AC source to support a Microgrid. The option of PQ input is important, such as the SMA Inverters which include PQ control but only for DC to AC.

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