Volumen 5 No. especial (2014) - IEE: Congreso de Ingeniería Eléctrica y Electrónica

Permanent URI for this collectionhttps://dspace-test.ucuenca.edu.ec/handle/123456789/21326

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Diseño de un cargador de baterías en aplicaciones de energía solar
(Universidad de Cuenca, 2014) Gallardo A., Rafael; Placencia L., Sebastián; González M., Luis G.; Universidad de Cuenca; Dirección de Investigación de la Universidad de Cuenca; DIUC
This article addresses the design of a battery charger for off-grid applications powered by photovoltaic solar energy, using a DC-DC buck converter and solar panels with nominal power of 100W. In the control system a perturb and observe (P&O) maximum power point tracking algorithm is applied aiming of operating at the optimum point, using a PWM modulator which controls the output current of the solar panel. The passive elements of the converter are calculated to operate in a continuous conduction mode. The control system uses a dsPIC30F4011, and its performance experimentally verified.
Diseño de un inversor monofásico con topología H5
(Universidad de Cuenca, 2014) Toledo O., Diego A.; Jaramillo V., Juan C.; Santillan S., Franklin G.; González M., Luis G.; Universidad de Cuenca; Dirección de Investigación de la Universidad de Cuenca; DIUC
This paper analyses the design of a DC/AC low power converter for the use of electrical energy from renewable sources. The converter uses a single phase inverter with H5 topology, coupled to a LC filter to reduce harmonic distortion. The system is designed to handle up to 100W and the inverter uses a unipolar Pulse-width modulation (PWM), experimentally tested using an open-loop with dsPIC30F4011 microcontroller.
Las energías renovables: La paradoja de la impopularidad de las tecnologías sustentables
(Universidad de Cuenca, 2014) Balderrama, Rafael; Universidad de Cuenca; Dirección de Investigación de la Universidad de Cuenca; DIUC
This article deals from a Latin American perspective with the existing contrast between the popularity of discursive practices on renewables and the unpopularity of these technologies. The article focuses in particular on the sociopolitical and institutional aspects of this paradox. The paper first contends the glamorous rhetoric on mandatory changes in the energy matrix, depicting the status of energy as a commodity, considering the social impacts and the structure of risks, costs, and benefits involved in the large-scale development of renewables. The author argues that the evaluation of such impacts and risks requires a long-term analysis taking into consideration future trends, the possibility of the foreseeable redesign of urban spaces, and sociopolitical constraints. The second portion of the article elaborates a couple of examples that illustrate how the popularity of conventional energy undermines the development of renewables. The manuscript concludes that the long-term challenge is the strengthening of the development of technoscientific capabilities that ensure a smooth transition to a new and more sustainable energy matrix.
Estación meteorológica autónoma con transmisión de datos inalámbrica en 5GHz 2x2 MIMO
(Universidad de Cuenca, 2014) Bosquez, Carlos A.; Lascano, Xavier A.; Universidad de Cuenca; Dirección de Investigación de la Universidad de Cuenca; DIUC
The article presents the compilation of ocean-atmospheric data in order to increase hit rates in weather forecasting. The project consists in the design of a self-sustaining prototype, able to acquire meteorological data using temperature and humidity sensors coupled to a data acquisition system, that transmit measurements to a PC by means of a microcontroller system and wireless communication system based on MIMO. For the real-time monitoring and managing graphical programming software is used. In addition to the existing systems, the self-sustaining prototype provides contingency plans to prevent possible damage to material property, will benefit the institutions in charge of monitoring meteorological variables, helps the prevention of calamities.
Estimación de la tasa de retorno energético: Análisis comparativo de las metodologías disponibles en la actualidad
(Universidad de Cuenca, 2014) Camargo, Federico G.; Schweickardt, Gustavo A.; Universidad de Cuenca; Dirección de Investigación de la Universidad de Cuenca; DIUC
This work presents a conceptual and preliminary analysis of the concepts and criteria for estimating the Energy Return on Investment (EROI). The manuscript discusses the issues and considerations for a standardized methodology that allows comparisons and decision-making, aiming at minimizing the environmental impact. Methods in monetary studies were discussed, such as the Life Cycle Analysis (LCA) method. For the analysis the modeling platform Dynamical Systems Analysis (DS) was applied using the VENSIM® software. A mathematical approach was made, defining the state and auxiliary variables and the adjustment parameters of the problem. Criteria were defined to assess the medium and long term sustainability of the energy system, with the objective to incorporate insights into relevant areas of discussion and education, enhancing the dissemination and review of findings.
Evolución histórica de los circuitos electrónicos de inducción magnética
(Universidad de Cuenca, 2014) Guamán, Jesús; Guevara, David; Ríos, Alberto; Universidad de Cuenca; Dirección de Investigación de la Universidad de Cuenca; DIUC
The electronic devices used in heating systems thanks to the development of power electronics rapidly evolved to magnetic induction. Currently, Ecuador’s government is firmly committed to transform the country’s energy model. This will involve replacement of the classic gas-based heating systems for hot water by magnetic induction devices. The article presents a comparative study of different topologies of electronic circuits used in the induction heating process in the last 20 years. The evolution of electronic circuit’s magnetic induction is due to the technological breakthrough of soft switching devices. The existing topologies and their application in commercial electronic circuits demonstrate the growing interest in magnetic induction systems and the search for continuous improvement and increase in energy efficiency. The paper provides a detailed description of the different topologies used in the induction heating industry, and provides a comparison of the resonance frequencies, the powers of labor and the most relevant designs and dimensioning of electronic circuits for magnetic induction heating. The study pretends to serve as a theoretical basis for the selection and design of prototype domestic water heating systems by electromagnetic induction for domestic use.
Implementación de la metaheurística FEPSO GIST mediante procesamiento paralelo: Aplicación al problema de balance de fases en sistemas de distribución en baja tensión
(Universidad de Cuenca, 2014) Schweickardt, Gustavo; Casanova, Carlos; Universidad de Cuenca; Dirección de Investigación de la Universidad de Cuenca; DIUC
This paper describes the design and implementation of the FEPSO GIST (Fuzzy Particle Swarm Optimization with Global-Individual Star Topology) Metaheuristic, under a paradigm of parallel computing platform using the MPI (Message Passing Interface). The model is applied to the solution of Multiobjective Unbalanced Load Problem in Low Voltage Electric Distribution Systems (ULP LV EDS). First, the ULP LV EDS is presented, which has no solution by classical optimization methods. Then, the framework over the heuristics methods has a wide range of application and the parallel computation is the main approach to accelerate the results of algorithms that require a more powerful computing process respect of sequential paradigm, is described. Finally, the FEPSO GIST Metaheuristic design, in this framework, is presented, and its implementation MIP is applied on a real ULP LV EDS.
Quadcopter stabilization by using PID controllers
(Universidad de Cuenca, 2014) Romero, Luis E.; Pozo, David F.; Rosales, Jorge A.; Universidad de Cuenca; Dirección de Investigación de la Universidad de Cuenca; DIUC
This work presents the stabilization of a quadcopter by using PID controllers to regulate its four basic movements: roll, pitch, yaw angles, and altitude. The stabilization of the system is made from a simplified model which makes easier the implementation of controllers on a SISO system, showing effectiveness within a range of ±10° for a roll and pitch angles and a full range on yaw angle and altitude. The PID controller module is designed to be used with commercial quadcopters and it has been implemented using inertial and ultrasonic sensors. Furthermore, the system also features a wireless interface to observe the aircraft performance during the flight.
Sistema de identificación para filtros activos de potencia
(Universidad de Cuenca, 2014) Peña, Felipe; Viola, Julio; Restrepo, José; Universidad de Cuenca; Dirección de Investigación de la Universidad de Cuenca; DIUC
The paper presents an identification system applied to active power filters, using multilevel converters. The identification system was implemented by simulation, utilizing the least squares method. The identification algorithm allowed deriving the coefficients of the model of the interface circuit between the network and the converter, and to present it in a differences equation. The identified model will be used to design different types of digital controllers to be implemented in converters; its purpose is to reduce the total harmonic distortion of the network and the power factor correction. This work includes a comparative analysis of the identification of the active filter with nonlinear load and the LCL filter, represented as a linear model.
“Soft Robotic”: Una nueva generación de robots
(Universidad de Cuenca, 2014) Medina H., José; Vélez N., Paulina; Universidad de Cuenca; Dirección de Investigación de la Universidad de Cuenca; DIUC
The necessity to create robots that can interact in an easy and effective way with the real world brings an increasing interest to use new materials and unconventional morphologies of robotics. This paper serves as an introduction to the soft robotics field, as a safe, efficient and robust alternative to interact in a dynamic and unstructured environment. In addition, it raises the challenges of this paradigm shift from different points of view.

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