The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
As a consequence of the new trends given by the smart grids, the network electricity infrastructure will change, and with this changes, the energy markets will have more variables and complexity. So new portfolio management strategies are needled. In this paper an optimal investment portfolio management strategy is proposed, based on Model Predictive Control and Hierarchical Control techniques, used...
This paper proposes a new model for electric energy production, using physical workout that is done daily in spinning bicycles and elliptical trainers in gyms. Two gyms were visited and the kinetic energy generated for the machines was evaluated in order to determine the most efficient machine and the amount of energy the machine can produce. Having the machine design, the next step is to simulate...
Presents the front cover or splash screen of the 2012 IEEE International Symposium on Alternative Energies and Energy Quality (SIFAE) proceedings record.
This paper presents a methodology for load estimation of power transformers by means of an artificial neural network. To implement the proposed methodology the data of two power transformers, located in different places and with different operational conditions, were considered. Real data from a data base was provided by utility Interconexión Eléctrica S.A. (ISA). To forecast the load curves a neural...
This paper presents the design of a supervisory system of an Anaerobic Biodigestor pilot plant located at Universidad de Ibagué in Colombia to produce Biogas. This contribution includes the design of a reliable low-cost instrumentation; whereby, the correct selection, implementation, and calibration of sensors of temperature, pH, CO2, CH4, and gas flow play an important role in accomplishing a good...
This paper outlines the analysis of the concept in the implementation of distributed generation systems focused on the city of Bogotá. Different experiences of adoption of this type of generation, that could be located in various parts of the city, with special emphasis on the economic, environmental, and improved reliability of electricity supply, reported by different authors. Similarly, it also...
This paper presents a proposal for a LEMP simulator circuit for testing an RF-Based Lightning Detector integrated into a PQ Monitoring System to which was added the feature of Auto Correlation of power disturbances with the LEMP spectral components.
The quality of service indicators in distribution networks represents a main concern in the power industry nowadays, and the power quality measurements (PQ) are an important part to obtain these indicators. When a PQ disturbance is detected and measured it has to be characterized to obtain the parametric data related with it; this way, it can be classified according to international standards. To...
In this paper we study the characterization of beef tallow; the production of biodiesel and biodiesel blends diesel. Beef tallow is characterized in terms of calorific value, moisture content, impurities, density, cloud point, pH and acid value. In the production of biodiesel is working the variables reaction temperature, reaction time and molar ratio alcohol, fat, being obtained as an optimum reaction...
This paper shows a simplified methodology for assess the impacts of photovoltaic systems connected to a supply of low voltage distribution power system, analyzing voltage variations outside the limits according to the NTC 1340, the chargeability and losses through a development software implemented in DIgSILENT ®. The development includes the characterization of solar resource and ambient temperature...
The actual development of wind energy in several countries around the world become it as the fastest growing power generation technology between green and clean technologies. Almost 50% of the installed wind turbines are induction generators. With the increase of induction instead of synchronous generators, electrical networks are experiencing different disturbances, which require permanent transient...
This paper illustrates the analysis on the Rational Use of Energy (RUE) was performed in one of the government administrative buildings in the city of Bogotá DC Colombia, in order to achieve a good use of energy resources to enable greater efficiency, optimal consumption of energy, a contribution to the environment, a decrease in energy costs and increased productivity as a state entity.
This paper presents stability analysis of a photovoltaic (PV) system with DC/DC flyback converter. Traditional methods of stability analysis have limitations due to the non-smooth nature of the converter, but it is possible to analyze a piecewise smooth system with the Filippov's method. Functions are presented for each of the surfaces defined by different switching states. Simulates the behavior...
This paper analyzes the effect of the implementation of photovoltaic systems interconnected to a branch circuit of an electricity distribution network in the city of Bogota. By computational simulations NEPLAN tool, connecting the photovoltaic system to the network, the change is evidenced in the direction of power flow, the variation in the levels of voltage, current and power losses, which are then...
Voltage control and reactive is an ancillary service needed for the reliable operation of power systems. This article discusses the technical advantages of the use of distributed generation (DG) for voltage support and reactive. It also suggests a dynamic model that allows studying incentive policies to increase GD installed in the Colombian power system.
There are certain problems within Microgrids related to the reactive power, due to the installed Distributed Generation (DG) and the non-linear loads. A Microgrid is implemented with PSCAD/EMTDC software and three study cases, or operational modes of the Microgrid, are simulated. Initially a characterization of the power flows through the Microgrid is done, using the P-Q Theory, which facilitates...
The power consumption in buildings represent a 30–40% of the final energy usage, which is caused by: HVAC (Heating, Ventilation and Air Conditioning), lighting and appliances with any connection to the power grid. The major challenge is to minimize the power consumption by optimizing the operation of several loads without impact in the customer's comfort. For this purpose, the design of an Intelligent...
This project consolidates around the design and implementation of a prototype for wood drying experimentation; based on a medium power RF circuit coupled to a drying platform it looks for to validate the endogenic heating phenomena by dielectric means. As it was conceived for research purposes, it is rugged enough and it has the proper protected for user safety and technical endurance; due to these...
In this article, a new kind of led emitter diode is used. The HB-LED (High Brightness Light Emitter Diode), were selected and tested and the results compared with existing light sources used in the Universidad Autónoma de Occidente. Results shows better visual perception of space and great energy savings between 41% and 73% of power consumption compared with actual technology such as high pressure...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.