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Copyright of Revista Iberoamericana de Ingeniería Mecánica is the property of Editorial UNED and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Three-phase asynchronous motors represent between 60% and 75% of world consumption. Their high incidence in the load curves of a country and, consequently, in the operation of electrical systems makes necessary the development of models that allow their analysis in an effective way and their use in software for the analysis of electrical networks. In any industry there are a large number of electrical machines located in Motor Control Centers all connected to the same busbar. It is possible to group all the motors that are connected to the same busbar forming a single equivalent motor. This paper presents a methodology for obtaining the parameters of an aggregate. From its application to three different case studies, the parameters of a universal aggregate model of a three-phase asynchronous motor for power system analysis are obtained. [ABSTRACT FROM AUTHOR]

This paper proposes an alternative methodology to optimally design an electrical distribution system in a real urban area. A medium voltage (MV) network polygon is extracted from the web page of a distribution company (GIS platform), which serves as a comparison pattern. A redesign of the medium voltage network is made to the extracted polygon. Taking as a premise that it is a new urbanization that needs to be provided with electric power, with all the technical requirements imposed by the regulating entity, good power quality and at minimum cost. To achieve this goal, two mathematical optimization models are used. The methodology begins by delimiting the project area in a geo-referenced manner; in this area 36 possible sites are located where the distribution transformers that will provide electricity to the new urbanization can be placed. The first optimization model determines how many transformers will be installed, by means of a minimization objective function, the constraints of the model are: transformer capacity (KVA) and coverage (number of subscribers connected to the low voltage network of each transformer). Once the number of transformers to be installed and their respective geo-referenced optimal locations are determined, the model is run. The second heuristic optimization model, based on graph theory, calculates the mine spanning tree for the connection of the medium voltage electrical network, thus interconnecting the transformers of the project with the minimum distance, thus optimizing the construction cost. These optimization models are implemented and solved with Matlab and LpSolve software. The topology found with the two proposed models is electrically evaluated by running power flows with CYMEDIST software. Finally, the proposed model is evaluated by comparing the electrical parameters obtained with the electrical parameters of the polygon extracted from the GIS system of the distribution company. [ABSTRACT FROM AUTHOR]

Copyright of Saber, Ciencia y Libertas is the property of Saber, Ciencia y Libertad and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Crónica Tributaria is the property of Instituto de Estudios Fiscales, Ministerio de Hacienda y Funcion Publica and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Tecnura is the property of Tecnura and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Estudios Gerenciales is the property of Universidad ICESI and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Circuit breakers serve to connect and disconnect electric circuits under any operation conditions. Improving circuit breaker reliability is important for the correct operation of electric power systems. In this paper, we use one of the existing methods for the analysis of reliability in devices and components according to Norsok Standard Z-013. The criticality level of the circuit breakers in a substation is determined from the quantity of operational failures, the power flow through the circuit breaker, and the circuit breaker incidence in the electric power system stability. The paper includes the analysis of historical data over a five-year period and shows the results of the obtained mathematical expression. These results will allow developing maintenance strategies directed towards the most critical circuit breakers to improve their reliability. [ABSTRACT FROM AUTHOR]

Copyright of DYNA - Ingeniería e Industria is the property of Publicaciones Dyna SL and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In recent decades, renewable energies have become increasingly important at the global level, with a significant impact on the sustainable development of various nations. Although multiple papers have examined the efficiency of policies and instruments to promote renewable energy sources, the majority have disregarded the fact that the context in which policies are implemented determines how well they perform. This paper analyzes renewable energy development in the electricity market in Argentina, paying special mind to the contextual conditions in which the policies were designed and finding that in recent history, it is precisely these conditions that constitute the main reason why renewable energies have such a low degree of penetration in the electrical power system in Argentina. [ABSTRACT FROM AUTHOR]

Copyright of Palabra Clave is the property of Universidad de la Sabana and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Ingeniería y Competitividad is the property of Universidad del Valle and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This paper presents the answer to the cybersecurity challenges faced by the centralization of the electric power generation control in the second company of this type in Colombia. Likewise, it describes the main cybersecurity practices that were investigated, analyzed and implemented to establish and maintain a safe environment for operations, which allow facing the risks of cyberattacks on this essential service to the society. It presents the methodologies and technical measures that should have been considered in the different stages of the project to prevent cyberattacks from being effective, to identify them in a timely manner and to achieve the resilience of the supervision and control systems that were used and tested in this environment. It also shows how these results were used as a contribution to the evolution of Colombian national electric sector regulations on the subject and how they can serve as a basis for improvements to regulation and cybersecurity for other agents in the electricity sector in the country and the region. [ABSTRACT FROM AUTHOR]

Copyright of Revista Técnica Energía is the property of Centro Nacional de Control de Energia CENACE and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Técnica Energía is the property of Centro Nacional de Control de Energia CENACE and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Lecturas de Economia is the property of Universidad de Antioquia, Facultad de Ciencias Economicas and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Politécnica is the property of Politechnico Colombian Jaime Isaza Cadavid and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Digital de Derecho Administrativo is the property of Universidad Externado de Colombia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This paper presents a multisectoral analysis of the increase in electricity prices in the Mexican economy, applying a pricing model and using the most recent input-output matrix. Increases in the manufacture of petroleum derivatives and coal, as electricity sources, are also analyzed. Additionally, increases in the generation, transmission and distribution of electricity are studied. The key findings obtained from this analysis show that a 40% increase has the most significant impact on sectors such as air transport (7.76%); land passenger transportation (6.04%) -except rail-, tourist transport (6.04%) and on the generation, transmission and distribution of electricity (5.58%). This increase in turn impacts all subsectors of the national economy. [ABSTRACT FROM AUTHOR]

Copyright of Revista Educación en Ingeniería is the property of Asociacion Colombiana de Facultades de Ingenieria and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista de la Maestría en Derecho Económico is the property of Pontificia Universidad Javeriana and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Energía y Computación is the property of Universidad del Valle and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Cuadernos de Economia is the property of Universidad Catolica del Uruguay Damaso Antonio Larranaga and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Ingeniería y Universidad is the property of Pontificia Universidad Javeriana and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Ingeniería y Competitividad is the property of Universidad del Valle and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Marine energies are being increasingly considered worldwide as a major and promising resource. One of them, wave energy, captures the mechanical energy of waves to generate electricity. This paper presents a review of the following topics: global energy situation, advantages and currently used types of wave energy converters. Chile possesses an energy situation that requires the use of new technologies. The region of Tarapacá has a considerable potential for generating electricity from waves, so using this type of energy is presented as a highly relatable option with industries that are part of the major economic driver of the region. [ABSTRACT FROM AUTHOR]

This paper proposes a methodology for the analysis of power quality in industrial electrical installations. Initially, a multipoint measurement is performed, then the phenomena that most affect the industry are identified and analyzed, then the system is modelled and adjusted to the real behavior, and some solutions are proposed and simulated. Subsequently, a case study is selected and the power quality study is carried out on the basis of the proposed methodology and according to the parameters of the NTC 5001 standard. Finally, the advantages of using multipoint measurement and modeling in power quality studies are established. [ABSTRACT FROM AUTHOR]

This paper aims to identify the key determinants of Chilean spot power price and assess their relative importance in recent price decline. To do so, we use a VAR model with weekly data between the years 2015-2016 and variance decomposition analysis to attribute variations of marginal cost to different shocks. The results show that while the availability of water for hydropower and lower fuel prices are important for explaining power spot prices, they only account for 50%-75% of the marginal cost's variance, leaving 25%-50% to other factors, such as more renewable generation and lower generation from oil sources, among other factors. [ABSTRACT FROM AUTHOR]

En Latinoamérica las estrategias de reducción de pérdidas no técnicas de energía han impulsado la implementación de los sistemas de medición centralizada (SMC). Los SMC, además de incluir las funciones básicas de un sistema AMI, se caracterizan por integrar la medida de múltiples usuarios dentro de una caja diseñada para su instalación en postes, con el fin de restringir el acceso de los usuarios al medidor de energía. En la actualidad la mayoría de los equipos SMC disponibles comercialmente presentan una mezcla de tecnologías, cuyas interfaces y modelos de datos son de carácter propietario, lo que genera un grave problema de interoperabilidad, en parte, originado porque los estándares internacionales están orientados para su aplicación en medidores de energía individuales. Se propone, entonces, en este trabajo un conjunto de estándares al nivel de tecnologías, protocolos de intercambio de información y modelos de datos que pueden ser aplicados en SMC. The non-technical energy losses reduction strategies have stimulated the development of centralized metering systems (cms) in Latin America. Furthermore to include ami systems basic functions, the cms embed the measurement of multiple users in a cabinet. To avoid the utility customers getting access to the energy meter, each cabinet is mounted on top of an electrical pole. Currently, the major commercially available cms equipment is setting up with several technologies, which involves owner interfaces and data models. This issue generates an interoperability problem since international standards are based on measurement architectures for the use of individual meters. This paper proposes a set of both information exchange protocols and standardized data models that could be implemented in cms equipments. [ABSTRACT FROM AUTHOR]

This paper presents an overview of the marginal location prices calculation (LMP) in the power system. The LMP are obtained from a DC optimal power flow, DCOPF, including transmission losses and transmission capacity lines. A salient feature is the role of the distributed slack bus in the loss factors, as well as, the impact of the network congestion on the price setting, which is explicitly recognized. Simulation results on a six bus system are reported to verify the proposed approach. [ABSTRACT FROM AUTHOR]

This paper analyses the Spanish residential demand of a bundle of goods conforming the basic services of the households (i.e. electricity, natural gas and drinking water) in 2012. The analysis is made using a QUAIDS model modified in order to consider the censoring in the consumption of natural gas following the approach of Tauchmann (2010), one of the latest advances in this field. The results show that the demand for electricity and drinking water is less sensitive to the variations in prices and household's income than that of natural gas. [ABSTRACT FROM AUTHOR]

This paper analyzes State powers over the Mexican electricity industry. The 2013-2014 energy reform replaced the hybrid single buyer model --flawed as a result of excessive government intervention-- with a wholesale electricity market that will gradually be extended to all users. To maximize competition, the State has retained ample and numerous powers to intervene through the Ministry of Energy. The transition from a public monopoly to an open market entails significant risks, which Mexico aims to minimize with strong political authority and a relatively controlled market. [ABSTRACT FROM AUTHOR]

This paper presents a result of research financed with own resources; It presents a state-space model of a three-phase controlled Active Front End rectifier. Using this model, we design a control law oriented voltage (VOC), directed to behavior as resistive load, unity power factor, which is tested by simulation using SimPowerSystem Toolbox in Matlab - Simulink ®. [ABSTRACT FROM AUTHOR]

Copyright of Actualidad Jurídica Ambiental is the property of CIEMAT, through its Centro Internacional de Estudios de Derecho Ambiental (CIEDA) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This paper shows a high voltage power supply design experiences realized by half wave multipliers. The source supplies an output voltage in order of 102 V and current of the order 10-3 A. Experimental results of the power supply applied to a high voltage pulses generator are shown and analyzed. [ABSTRACT FROM AUTHOR]

Copyright of Estudios Gerenciales is the property of Universidad ICESI and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Academia: Revista Latinoamericana de Administración is the property of Emerald Publishing Limited and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of DYNA - Ingeniería e Industria is the property of Publicaciones Dyna SL and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This paper presents a review of the state of art of characterization, identification and location of voltage sags. The methods presented are the product of different analyzes on electromagnetic disturbance, specifically on voltage and current waveforms. Electrical circuits theory, electromagnetic transients and knowledge of the phenomenon are used to propose attributes and descriptors to characterize the disturbances according to some interest characteristic. A review of basic characterizations and methodologies that integrate complex classifiers and descriptor is performed. Emphasis is performed on characterization methods, together with attributes and descriptors, where the limitations and possible improvements are included. According at development level in these studies, new methodologies are needed to integrate characterization, diagnosis of causes, localization, assessment and information extraction modules. The methodologies are oriented towards a tool for automatic management of power systems disturbances. [ABSTRACT FROM AUTHOR]

Copyright of DYNA - Ingeniería e Industria is the property of Publicaciones Dyna SL and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Tecnura is the property of Tecnura and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Tecnura is the property of Tecnura and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This paper shows a state-of-the-art rewiew on the Distribution Static Compensators used for the power quality improvement in distribution systems. The review includes: the operation principle, its basic operation modes, its compensation options, the power converter structure and the main trends of its control strategies (generation of the reference signals, power converter control and DC storage device control). The control strategies are emphasized due to the extensive research on this field and their key role in the compensator performance. [ABSTRACT FROM AUTHOR]

This paper presents a simulation of electricity production from several small wind turbines in the wind regime of Olinda-PE-Brazil, taking into account a number of records wind speeds and temperature in 1998, with the aim of developing a performance analysis tool that allows its selection. The hourly wind speed data were discretized at appropriate intervals to allow better handling of the information contained in the curves of electricity, supplied by manufacturers. The tool allows a comparative analysis of the performance of wind turbines, both in the aspect of the electrical energy production as its efficiency in function of wind speed. The results show that of the local wind regime influenced the production of electricity and that the data provided by manufacturers must be certified. [ABSTRACT FROM AUTHOR]

In spite of the fact that primary and secondary distribution systems are unbalanced by nature, the reactive power compensation on these systems is commonly developed by the use of balanced capacitor banks. In this paper, the general formulation for the reactive power compensation problem on unbalanced systems with unbalanced capacitor banks is developed. Four examples of reactive power compensation on the secondary of unbalanced three-phase transformers banks are presented. All the examples show that the compensation by unbalanced capacitor banks increases the active power losses saving as well as reduce the transformer's load and contributes to balance the line currents when the load is unbalanced. [ABSTRACT FROM AUTHOR]

In this paper, a comparative analysis of these two types of wind turbine generators is made. The base for the comparison is the behaviour of the generator and the system submitted to different disturbances such as voltage dips, short-circuits, winds gusts and load changes. The MATLAB SimPowerSystem toolbox is used for doing these analyses. Its last version has a Wind Turbine Generator tool that facilitates the work. In the case of the Cage Induction Generator, a changing paralleled capacitor bank and a static var compensator are supposed and analyzed. It is demonstrated that the last one is capable of support network voltage. Finally, the superiority of the Doubly Fed Induction Generator is clearly demonstrated and well argument. [ABSTRACT FROM AUTHOR]

Copyright of DYNA - Ingeniería e Industria is the property of Publicaciones Dyna SL and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The utilization of the wind for generating electric energy requires carrying out the forecast of the performance of wind turbine generators connected to the network. It is necessary to know the possibility of the outage of these machines due to the random nature of the wind or due to miss operation of the network. It is also necessary knowing the way the generators will respond and the time of duration of these failures for guarantying a stable and efficient performance. This information can be obtained utilizing a mathematical model based on Matlab Simulink. In this paper the performance of a wind turbine generator in parallel with an infinite bus and submitted to different disturbances is obtained and analyzed. [ABSTRACT FROM AUTHOR]

In the paper the general considerations of the unbalanced are presented in the electric systems of low tension, the causes that provoke it, as well as the undesirable effects that cause. Starting from the current investigations it is possible to model the unbalanced like a component of power doesn't activate. This concept applied to a method proposed by the authors for the estimate of the demand during the stage of project of the systems, facilitates a bigger accuracy in the determination of the same one, that which is presented by way of example in a practical application. [ABSTRACT FROM AUTHOR]