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.
This article introduces the concept of interrupting capacity and its importance in the protection devices and switches in medium voltage power. The impact of the interrupting capacity in power system reflects the energy conditions of the primary electrical equipment and the condition of life to which they are subjected during operation. Recommendations are also shared: Why maintain an adequate safety...
In this article the concept of voltage drop, its characteristics within industrial electrical systems, causes and effects that cause shown. The voltage drop is described in a didactic concept and defines some of the causes of recurrence and need to understand for an analysis of a power system. The basic concepts that help to understand the impact of voltage drop are displayed. Also, are some of the...
Asynchronous machines are a viable option for the use of the energy offer by little renewable potentials due to the advantages presented against its synchronous counterpart. With the implementation of a greater number of three phases, to these advantages add up improvements in performance that offers a multiphase structure. This paper proposed a static synchronous compensator (STATCOM) controlled...
This research shows how electronic messaging systems (EMS) are being used, increasingly frequently, by users of mobile services, the user preference for the different systems currently available of electronic messaging and type mobile devices being used as the means to send and receive text messages. The research is also intended to determine the preference of users to send a text message instead...
This paper presents a study carried out in Bogota D.C. — Colombia, in which a set of electric insulators were exposed to the development of the fungus Phanerochaete Chrysosporium. Ceramic and polymeric insulators frequently used in Colombian distribution systems were selected. The biocontamination process is performed under regulated conditions using a controlled environment chamber able to adjust...
The way to choice an interconnection grid in medium or high voltage, may not be only based in the existence of a voltage level in the site or by the electrical losses level, but also include the reliability of a sub-transmission or transmission grid could give. It is shown the analysis of data since two interconnection available options for a power plant with 34.5 kV y 138 kV grids near the project...
The sun is a primary power source that can be turned into electricity by means of PMW or multilevel inverters. Despite the actual higher cost-effectiveness of other power sources, approximately around +14–15%, even including the plant losses (cables, inverters, transformers etc.), sunlight is a free and unlimited source which cost-effectiveness can be improved up to 22% [1]. The paper drives the attention...
The destruction of forests in Panama, the effects of climate change, collectors and illegal trafficking has led to Orchid Peristeria Elata having the status of endangered species. Known in Panama under the name Flower of the Holy Spirit, this orchid has been declared by law as representative element of Panamanian folklore. Despite the efforts made to conserve this orchid in its natural habitat, the...
A city is smart when the social investment, human resources, communications and the building infrastructure, coexist harmoniously and systematically through the use of Information and Communication Technologies (ICT), which generates better quality of life and natural resources efficient management through the citizens participation. In Latin America and the Caribbean region some countries implement...
The efficiency rate is one of the basic parameters that a transformer must comply in order to be sold in the market. However, some electric companies decide not to buy solely on the final price but on the Total Owing Cost (TOC). This means, the additional cost the company will have to pay besides the transformer cost due to operational losses throughout its lifespan. Therefore transformers in this...
In this paper is proposed a high level programming approach based on data structures for the accurate and efficient simulation of electromagnetic transients in electric circuits and power networks. The proposed methodology uses the nodal analysis technique as in the commercial EMTP-type programs to update voltages and currents in the power network. In addition, it is used the numerical trapezoidal...
In most of the developing countries, economic losses arising from the theft of power can difficult the finances and the demand planning of marketers and lead to the collapse of the electrical system of a country. This has led considerable efforts in the search for solutions to detect frauds of energy based on the application of statistical algorithms for the analysis of load patterns. The lack of...
This work is a guide to preparing a first estimate report on the design and dimensioning of a photovoltaic power system with network connection. The same is presented to Congress CONCAPAN Honduras 2015, the IEEE Power & Energy Society. The document contains the initial data required, the solar resource available, and how the influence of weather variables in the design is. A description of the...
The development of a dry-type outdoor transformer for pole-mount applications has first been presented at the 2011 CIRED conference [1]. While regular dry-type transformers always need to be protected by an enclosure from the environmental conditions, these dry transformers can replace pole-mounted, oil-filled transformers without the need for an enclosure and are able to withstand sun, rain, snow,...
Synchronous generators and static var compensators were analyzed for the assessment of voltage stability conditions in a power system. The best equivalent models were established for two scenarios: when the voltage control is active and with loss of voltage control. Once the voltage stability indexes were calculated in all cases, the loss of voltage control proved to have a negative impact on voltage...
This paper presents the application of a mathematical algorithm based on the gradient method [1] to solve optimal power flows (OPF) in electrical microgrids with photovoltaic generation in order to improve the voltages profiles and consequently reduce the active power losses. The generation and storages devices were modeling by dynamic curves and the algorithm was implemented in a two electrical microgrids...
This article describes the experiences gained with the automation process of PC boards creation using an open source CNC machine. It describes the advantages and disadvantages regarding the use of corrosives chemicals, the impact on the environment and the implementation experiences at the academy.
This paper will provide a general overview of different characteristics of transmission poles and general design considerations included in the ASCE Standard ASCE/SEI 48-11 Design of Steel Transmission Pole Structures. Information related to pole geometry and typical single pole configurations is provided. Then, information about connection between sections and types of foundations typically used...
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.