Edwin Rivas

• District University of Bogotá

This paper presents an innovative approach to addressing the simultaneous integration of photovoltaic (PV) systems and distribution static compensators (D-STATCOMs) within distribution networks by employing the Sech-Tanh Optimization Algorithm (STOA). The proposed STOA method uses a discrete-continuous codification scheme to determine the optimal p...

This paper demonstrates that graph-based power flow methods for strictly radial distribution networks (one basedon the upper-triangular matrix and the other on the incidence matrix or classical backward/forward power flow method)are equivalent, implying that both recursive power flow formulas are the same. A small distribution network composedof se...

La Revista INGENIERÍA es una publicación cuatrimestral de carácter científico editada por la Universidad Distrital Francisco José de Caldas. La Revista está dirigida a la comunidad académica, investigadores, sectores productivos, institutos de investigación y en general al público interesado en los temas del campo de la Ingeniería y Tecnología. Su...

This paper deals with the problem of the optimal placement and sizing of distribution static compensators (D-STATCOM) in electrical distribution networks to reduce the total annual operative costs associated with the total costs of energy losses added with the investment costs in D-STATCOM. The metaheuristic sine-cosine optimization algorithm deter...

Este trabajo propone maximizar la resiliencia del sistema eléctrico ante ataques intencionales a través de la implementación de recursos energéticos distribuidos (DER) generación distribuida (GD) y respuesta a la demanda (RD). Se aborda en primera instancia el caso en el que un agente disruptor, tiene como objetivo maximizar el daño a la red (expre...

The problem regarding the optimal location and sizing of fixed-step capacitor banks in distribution networks with radial configuration is studied in this research by applying a two-stage optimization approach. The first stage consists of determining the nodes where the capacitor banks will be placed. In this stage, the exact mixed-integer nonlinear...

This paper contributes with a new two-stage optimization methodology to solve the problem of the optimal placement and sizing of solar photovoltaic (PV) generation units in medium-voltage distribution networks. The optimization problem is formulated with a mixed-integer nonlinear programming (MINLP) model, where it combines binary variables regardi...

In Colombia, Battery Energy Storage Systems (BESS) is expected to be included in transmission and distribution power systems in the following years. In this paper, Quasi-Dynamic Simulations are performed to evaluate the BESS include impact in a Local Distribution System (LDS) lightly loaded. Simulation is performed in the IEEE 34 Node Test Feeder S...

This paper deals with the problem of optimal location and reallocation of battery energy storage systems (BESS) in direct current (dc) microgrids with constant power loads. The optimization model that represents this problem is formulated with two objective functions. The first model corresponds to the minimization of the total daily cost of buying...

In this paper, the impact of active demand–side management strategies, including Energy Management Systems (EMS), Photovoltaic Systems (PV) and changes in the domiciliary energy consumption habits is analyzed. In order to perform the study, the city of Bogota and the municipality of Cajica in Colombia -South America were selected, since, despite of...

In the present article, the main needs of collection centers and immediate care facilities in case of disasters are analyzed. A model is proposed for the services provided by these collection centers based on queuing theory, including an assessment of the arrival rates and service capacities, waiting times before being treated or receiving no healt...

This paper analyses the behaviour of the demand curve in the residential sector from Bogotá, Colombia, based on changes in the electric energy consumption behaviour of users. Initially, a survey divided in analysis units focused on obtaining the main characteristics of residential energy consumption was conducted. Using this information, a stochast...

Distributed generation is one of the most accepted strategies to attend the increase in electrical demand around the world. Since 2014, Colombian government agencies have enacted laws and resolutions to promote and regulate the introduction of different generation technologies into the country’s electrical system. The incorporation of distributed g...

Cognitive radio is a paradigm that proposes maximizing the utilization of the usable radio-electric spectrum, allowing licensed users (PUs) and non-licensed users (SUs) to simultaneously coexist through the dynamic management and assignment of spectrum resources, by integrating the stages of spectrum sensing, decision, sharing and mobility. Spectru...

This article describes a detailed study and analysis of the redundancy protocols used for automation networks and power systems. According to requirements for communications network, protocol services and messaging services, presented in the IEC 61850 standard, the use of network protocols is required to ensure the maximum time allowed in communica...

This paper shows the design phases of a platform model for the integration of users with distributed energy resources (DER) in a distribution network. DER considered are the demand response (DR) and the distributed generation (DG). The paper shows how, through the integration platform, users can become providers of services and energy for the netwo...

This paper introduces a model based on set theory and modern algebra that formalizes sentences and their context. The model aims at dividing sentences into cores which will be mapped into sets of an algebraic space; some of these cores have a type of context called strictly linguistic context. These sets along with an operation form Abelian groups....

El presente artículo describe la investigación que condujo a la implementación de un aplicativo WEB que permite la integración de usuarios en un programa de respuesta de la demanda (RD) por incentivos. Para esto, se ha diseñado un agente integrador que coordina la participación de los usuarios y evalúa económicamente el costo del servicio de RD que...

In this paper a strategy for integration of Distributed Generation (DG) in Demand Response (DR) program is proposed. This strategy allows users of DR increase both the number of participation or the manageable power in disconnecting power program along the day. This paper explores the improvements of voltage profile in an IEEE node test feeder when...

This paper introduces a model based on set theory and modern algebra that formalizes sentences and their context. The model aims at dividing sentences in cores which will be mapped into sets of an algebraic space; some of these cores have a type of context called strictly linguistic context. These sets along with an operation form algebraic structu...

In this article, an electrical system with a study case is presented within the Colombian industrial electric sector in order to identify the changes in the electrical variables of a electrical network with distributed generation (DG). To achieve this, each present load in the 14-node IEEE system was modelled as daily demand curve of the Colombian...

This paper describes the results of the design of an Integrated Knowledge Management System in Health (IKMSH), including the description of a methodology for implementation; the system focuses on strengthening the provision of health services at the regional level and supported by knowledge management and information and communication technologies....

This paper provides a review and analysis of trends related to demand response (DR). The authors have considered six different topics for the analysis of DR trends: Users, Network Services, Markets, Complementary Programs and Distributed Energy Resources (DER). A brief summary of the consulted articles is included and the behavior of the different...

This article shows the connection and interrelation between complexity theory and knowledge management. It is planned to find mechanisms to communicate and share knowledge efficiently, improving knowledge management in a complex system such as the development software factories. As a result, it proposes a model of knowledge management, taking into...

This article presents the development and evaluation of an algorithm for the compression of fetal electrocardiographic signals, taken superficially on the maternal abdomen. This process produces a large volume of information that makes it difficult to store and / or transmit. The proposed algorithm seeks a lossless compression of the signal, applyi...

Los últimos avances en los sistemas de generación distribuida (GD) han abierto un nuevo escenario en las estrategias de planeación de los sistemas eléctricos. Toma gran importancia determinar los impactos económico y técnico que acarrean la instalación y la puesta en operación de GD en aquellos lugares del sistema de potencia donde antes solo estab...

This paper presents an overview of the smart grid with its features and functionalities and identifies the research activities, developments, problems and challenges of smart grids. To achieve this objective, a literature review was done, finding how the dynamic integration of developments in electrical engineering, energy storage and advances in i...

The present paper analyzes the modeling of a distribution network as an energy market, moving from a monopolistic structure to a scenario with an increasing number of competitors. To achieve this objective, the scenario of a network considering the transition from centralized to distributed supply was evaluated. Comparison of the characteristics of...

Due to the incursion of information and communication technologies in the educational context, teachers have seen the need to change their role, product because of the integration of different technologies that students use. In that sense, his pedagogical and didactic work is changing according to dynamics that are much more collaborative with his...

This article describe the actual situation for the platforms designed for the IoT (internet of Things) through the denominated industry 4.0 presenting related concepts. Based on the previous information we will do a knowledge management model for the industry 4.0 acknowledging the role of the used platforms on industry.

Spectrum sharing is one of the most important stages in cognitive radio wireless networks, responsible for the opportunistic allocation of free channels to unlicensed users (SUs) to be utilized in data transmission. One of the critical issues at this stage, is related to the absence of a module capable of allocating the available resources fairly t...

This paper introduces a new data structure useful to represent objects or data sets with several order relations between their elements. A specific case is the polygons that will be analyzed in this paper. Polygons are objects often used in Computer Graphics and their operations have a high computational cost; this data structure was implemented in...

Contexto: Se ha observado el desarrollo incipiente del proceso de integración de los Recursos Energéticos Distribuidos (DER) en los mercados eléctricos a nivel de distribución. Método: Se propuso la participación de los DER mediante un agente integrador. Dicho agente integrador permite que los DER participen como oferentes de energía para el opera...

Currently one of the major challenges in wireless networks is the optimal use of the radio spectrum as most researcher agree that the licensed frequency band is not in use most of the time. There has been a large amount of research in this area that converges in the use of Cognitive Radio (CR) as an essential parameter so that the use of the availa...

This paper presents an analysis of the behavior of the IEEE 30-node distribution system in presence of short duration variations; specifically sags and swells are assessed before and after implementation of SVC (Static Var Compensator) and DSTATCOM (Distribution Static Compensator). The magnitude for sags and swells is selected according to what is...

This article presents an application of the Particle Swarm Optimization (PSO) on the optimization of the power flow in an IEEE system with 14 nodes, which has some nodes with distributed generation. In first place, the mathematical model used for the optimization of the electricity generation costs is defined. Afterwards, this model is applied in a...

La revista Redes de Ingeniería de la Universidad Distrital Francisco José de Caldas, es un medio de difusión del conocimiento, del ejercicio académico y de la investigación que publica resultados de Investigación, revisión, y reflexión de la comunidad académico-científica. La publicación cuenta con una periodicidad semestral de manera electrónica,...

In this article, a management model for electricity distribution networks is proposed. The electricity distribution network includes elements of distributed generation (DG). The network monitoring is done through Phasor measurement units (PMU). The concepts of PMU, DG, management models for networks and Unified modeling language UML are analyzed. T...

Generating optimal schemes for processing secondary user (SU) requests during the spectrum band selection stage is one of the current challenges of Cognitive Radio (CR), because it directly affects the time needed by a Base Station (BS) to select and assign a channel so SUs can send their data in an opportunistic fashion over the wireless network....

This paper introduces a new data structure useful to represent objects or data sets with several order relations between their elements. A specific case is the polygons that will be analyzed in this paper. Polygons are objects often used in Computer Graphics and their operations have a high computational cost; this data structure was implemented in...

This paper proposes a home energy management model called GEDE, outlined in the Colombian Law 1715/2014. Different operation ways that can be applied in the proposed residential energy system are presented. The system has a variable topology, so that it is fed by distributed generation sources or by the interconnected system, and they are related t...

The current shortage and inefficient use of the frequency spectrum lead researchers to seek technological solutions to this problem [1], thus Cognitive Radio (CR) [2] is proposed, allowing a more efficient management of the existing resources so they can be exploited opportunistically by cognitive users. This paper presents the design and use of a...

The purpose of this paper is to present to the academic community the design of a possible simulator for Wireless Cognitive Radio Network Primary Users. Throughout the paper we present the flowcharts developed in Matlab in order to design and build the simulator. In conclusion, the simulator is built and will be used in the future for the developme...

The level of success of spectral decision in cognitive radio networks depends on how good the prediction model of channel usage is in both licensed and unlicensed bands. In this research, three different techniques are explored to predict channel state from the point of view of the use given by the primary user and optimization of the best techniqu...

This paper considers a short review of the scientific literature concerning standard power quality indexes and the colombian regulatory framework; the work was motivated in other studies proposing indexes to assess the impact of disturbances in power quality (with qualitative and quantitative approaches, with and without distributed generation). Th...

Se presenta una breve revisión de la literatura científica referente a índices normalizados en calidad de potencia y el marco regulatorio colombiano; el trabajo fue motivado por el reto de otros autores de plantear índices para evaluar el impacto de las perturbaciones de calidad de potencia (con enfoque cualitativo y cuantitativo, sin y con generac...

During the development of telecommunications, several encryption algorithms have been adopted and applied to wireless networks. In operating systems such as Linux, the tools for data transmission over wireless networks are reaching a level of sophistication in reference to other widespread operating systems that are supported by the manufacturers....

p>Se propone una aproximación conceptual de un modelo de gestión de energía en el hogar, denominado GEDE (Gestión de Energía Eléctrica Domiciliaria), el cual tiene como fin principal contribuir con la eficiencia energética domiciliaria; el modelo involucra protocolos de comunicación, infraestructura y software como herramienta de gestión para la to...

This paper shows the implementation of Knowledge Management as a tool to get the best of technologies for home electric management through a domotics prototype that controls a light remotely in real time and according to user needs, which was designed and developed focused on the concept Internet of Things. An analysis of the prototype operation an...

Este artículo presenta un panorama referente aplicaciones de Mecanismos de desarrollo limpio (MDL) a nivel regional y nacional enfocado a la recuperación de energía. Con base en este panorama se presenta una aproximación del desarrollo de proyectos de aprovechamiento y generación de energía a partir del uso de gas natural y su elegibilidad como MDL...

This paper raises a proposal starting from the current state that improves the process of allocation of spectral bands at the decision-making stage in cognitive radio, decreasing the time that the system takes to select a channel to transmit data from unlicensed users, assuming the existence of free spectrum and estimating the behavior of the secon...

Rev.esc.adm.negEl presente artículo, plantea una solución integral al problema del manejo de basuras en centros urbanos, realizando el reciclaje de los desechos, creando un Cluster económico y generando energía eléctrica de bajo costo con relación a sistemas de generación y distribución actuales. La solución propuesta atiende requerimientos medioam...

En este artículo se presenta un análisis acerca de los parámetros requeridos para un adecuado proceso de monitoreo y medición de armónicos presentes en las redes de energía eléctrica, para estudios de calidad de potencia. Inicialmente se introducen conceptos básicos de los armónicos presentes en las redes de energía eléctrica, posteriormente se men...

This paper describes the model of a management system for distribution networks including Distributed Generation GD elements. The proposed model is based on the use of labeled target function of distributed generation setting an order of priority to certain users (pro users) of the network, in terms of location and power dispatch rights. By means o...

This paper presents the development of a prototype system of phasor measurement (PMU) for a synchronous machine including PMU device design, GPRS communications link with a PDC phasor data concentrator through a web services; phasor information is displayed in real time on a standard web browser.

This article describes an integral solution to the problem of trash manipulation in urban centers, recycling trash, creating an economic cluster and generating low- cost- electrical energy in relation with the current systems of generation and distribution. This proposal responds to environmental and health requirements through the reduction and pr...

La revista Redes de Ingeniería de la Universidad Distrital Francisco José de Caldas, es un medio de difusión del conocimiento, del ejercicio académico y de la investigación que publica resultados de Investigación, revisión, y reflexión de la comunidad académico-científica. La publicación cuenta con una periodicidad semestral de manera electrónica,...

Presenta el estado del arte de las técnicas Dornenburg, Gases Claves, Rogers y Duval, las más empleadas para evaluar la condición del aislamiento de los transformadores de potencia; técnicas basadas en el análisis de gases disueltos en el aceite (DGA) e interpretación de resultados.

This paper presents the state of the art, concerning the techniques (Dornenburg, Gas Key, Rogers, Duval) which are most used for insulation condition assessment of power transformers, based on dissolved gas analysis in oil (DGA).

Este artículo presenta las simulaciones y cálculos realizados para el diseño básico de un generador de flujo axial usando el método de elementos finitos. Durante el proceso de diseño se evalúa el comportamiento electromagnético de los imanes seleccionados, se obtiene la característica B vs distancia, así mismo se define la geometría a usar para el...

Resumen Este artículo presenta una metodología para evaluar la inmunidad de un motor de inducción monofásico frente a huecos de tensión por medio de simulaciones en Matlab/Simulink. Para ello se diseñó un modelo de generador monofásico de huecos de tensión, y se implementaron algoritmos para obtener, modelar y mejorar la curva de sensibilidad del m...

Las redes actuales MPLS/IPv4 presentan las ventajas de poder implementar ingeniería de tráfico, así como realizar diferenciación de flujos mediante clases de servicio (CoS) frente a las redes con enrutamiento IP tradicional. En aras de aprovechar cualidades estratégicas durante la etapa de coexistencia entre IPv4 e IPv6 existen 4 métodos para prove...

La revista Redes de Ingeniería de la Universidad Distrital Francisco José de Caldas, es un medio de difusión del conocimiento, del ejercicio académico y de la investigación que publica resultados de Investigación, revisión, y reflexión de la comunidad académico-científica. La publicación cuenta con una periodicidad semestral de manera electrónica,...

This paperproposes amodelof the clearance processmanagementin systems powered byconventional electricand distributedgeneration, therebyimplementinga systemwhichallowto dynamicallyadapt toscenariosofvarying loads, randomnessof the parametersof efficiency andpower qualityof the systemtechnical constraints, economic and regulatory, as well as the acti...

This paper proposes a model of the clearance process management in systems powered by conventional electric and distributed generation, there by implementing a system which allow to dynamically adapt to scenarios of varying loads, randomness of the parameters of efficiency and power quality of the system technical constraints, economic and regulato...

La revista Redes de Ingeniería de la Universidad Distrital Francisco José de Caldas, es un medio de difusión del conocimiento, del ejercicio académico y de la investigación que publica resultados de Investigación, revisión, y reflexión de la comunidad académico-científica. La publicación cuenta con una periodicidad semestral de manera electrónica,...

En este artículo se hace una investigación de las principales técnicas que existen para modelar y predecir el tráfico de video de forma estadística, enfocándose en los modelos que usan series de tiempo con el fin de identificar cuáles de estos se acomodan mejor al tráfico estocástico representativo de los sistemas IPTV. Para tal fin, se hace una in...

Television has been one of the most important media used by man since its inception. It is, therefore, essential nowadays to fi nd a method to optimize the transmission process and interaction with the end user. The widely used conventional transmission system is ineffi cient in many respects, taking into account the means of transmission and the l...

Con la continua aceptación en el sector eléctrico del estándar para las redes de comunicación y automatización de sistemas de potencia IEC 61850, es importante contar con un conocimiento básico, de porque es catalogado con el eslabón apropiado para la estandarización de la comunicación en los sistemas de potencia eléctrica, revisándolo desde su obj...

This paper shows a bibliographic review of studies conducted at the international scope in monthly electric energy demand forecasting, and the works developed in Colombia. In addition, reports the state of the art of investigations done with wavelet transform applied to electric energy prediction and studies reported with the nonlinear neural model...

This paper describes a methodology for voltage sag characterization using Matlab/Simulink. It includes fault simulations for voltage sag magnitude calculation using Simulink, based on the SimPowerSystems toolbox, and also considering protection-systems modeling for sag duration calculation. Other sag characteristics, such as phase-angle jump and sh...

This paper describes the development of a phasor measurement unit using data wireless transmission via GPRS. The detailed process in the design and construction of the prototype and the difficulties faced at different stages are presented. The results are finally evaluated using the Total Vector Error (TVE) calculated for each of the testing design...

This paper presents the state of the art regarding electrical equipment's immunity to voltage sags. It deals with immunity analysis and voltage sag generators. An alternative methodology for testing equipment regarding voltage sag is proposed, along with immunity assessment. A comprehensive bibliographic review was made, describing voltage sag immu...

An onload tap changer (OLTC) in suitable conditions is essential for the operation of a power transformer. It is extremely desirable to have indicators that help assess the conditions of the OLTC, especially if these indicators can be used in an on-line monitoring system that does not affect the normal operation of the transformer. This paper descr...

The suitable condition of an onload tap changer (OLTC) is essential for the operation of a power transformer. It is extremely desirable to have some indicators to assess the OLTC condition, especially if these indicators are capable of being used in an online monitoring system that does not affect the normal operation of the transformer. This paper...