Estrella Parra

Effects of high penetration of CFLS and LEDS on the distribution networks

This paper shows the results of a computer simulation of two distribution feeders that supplies energy to costumers who use Compact Fluorescent Lamps and High-Power Light Emitting Diodes. An IEEE 13 node test feeder and a real distribution circuit have been used for the simulations. Voltage and current distortion is analyzed.

Feasibility assessment of Distributed Generation interconnection

This paper proposes a methodology to assess the technical and economic impacts of interconnecting Distributed Generation, with the possibility of islanding operation, directly in the customers of the distribution systems. This methodology allows to evaluate the effects on the reliability indexes of the distribution systems due to the interconnection of these kind of generation sources. Besides, it allows to determine the period time in which a customer retrieves the investment costs of the Distributed Generation installed, depending of the technology used. This methodology evaluates the feasibility of Distributed Generation interconnection by a balance between performance and costs. The methodology was applied to a test distribution system, operating under the technical and regulatory Colombian conditions, showing interesting results.

National Laboratory of Smart Grids (LAB+i) at the National University of Colombia-Bogotá Campus

This paper describes the design and implementation of the National Laboratory of Smart Grids in the University Campus (LAB+i) with the real-time integration of electricity, water and/or gas systems through six layers of Smart Grids that allow to make measurement of a process, local or remote communication in order to be integrated to the supervision and management system. Likewise in the following layers of the LAB+i, information management processes, decision making, modeling of systems and processes that enable the development of optimum efficiency and productivity applications are made. LAB+i is designed as a testing platform of technologies associated with Smart Grids, developing prototypes of measurement systems and communication drivers related to Smart Grids for Smart Cities. Finally, the research capacities, technology and innovation development are presented, which the LAB+i laboratory would allow to include the incorporation of local business pilot projects to be optimized, adaptive technology testing, evaluation of local environmental conditions and their requirements.

Determination of sag disturbing and sag vulnerable zones in a distribution network using stochastic fault simulation

This paper proposes a methodology to predict the sags level caused by faults that may affect users in a distribution network. The methodology determines the trend of the possible fault location, the fault type and failed phases by analyzing historical data. These trends are modeled using probability densities and are simulated using Monte Carlo techniques (Gibbs algorithm). With the simulation results, a statistical analysis is performed to determine the average sag depth in each user as well as the most vulnerable areas against this type of disturbance. Finally, a sensitivity analysis is achieved with the aim of identifying zones where these disturbances cause a great impact on the average sag depth (disturbing areas) in order to implement the required solutions.

Analysing effective lighting devices impact on power quality and electric grid efficiency by means of FBD-power theory

Currently the impact of high efficient lighting devices such as compact fluorescent lamps (CFL) and light emitting diodes (LED) is an important concern for the electrotechnical community. This paper makes a contribution towards determining the impact of these devices on electric grid power quality and efficiency, proposed by means of applying FBD-power theory to the currents absorbed by CFLs and LEDs. An analysis of the waveform distortion regarding the standard IEEE 519 and efficiency detriment quantification are presented.

Software development for determination of power quality parameters

The Colombian Energy and Gas Regulating Commission -CREG- through resolution CREG 024 of 2005, requires monitoring some power quality disturbances in substations of distribution systems; the main objective of this resolution is determine electrical power quality supplied by the utility operators to costumers by means of measurements analysis. In this paper the authors proposes a computational tool for management and classification of power quality measurements required by Regulator Entity, This tool performs a power quality analysis in substations and shows information about conditions in power quality to conduct subsequent analysis.