The electric power converter for downhole telemetry systems of oil-well pumps include a downhole block connected to the pump that contains electronic circuits required for the operation of the motor pump sensors and transmission of data about their condition to the surface are described. A few methods of electric power conversion for this purpose are considered. The circuit contained two steps of voltage converting are proposed. The electrical scheme of this method is considered in the article. Proposed decisions are simulated and verified experimentally. The input high supply voltage range (200-4200 V) without loss of efficiency (even temporary) was obtained. The results of simulation and experimental studies have shown very close results.

Electric Power Converter with a Wide Input Voltage Range

This paper shows the design of a computerized educational material for the teaching of oscillations and waves, aimed to high school students. It is carried out with 27 students of eleventh grade of the Institucion Tecnica Educativa Valentin Garcia de Labranzagrande, Boyaca. The technological tool was designed having in mind the socio-demographic characteristics of the population, access to technology and the ability to use it. Furthermore, students learning styles were considered as a basic input to develop an appropriate material to their context. The design is based on the methodology proposed by Galvis Panqueva for the development of software, getting as a result a multimodal tool, in which different activities that focus on learning styles are presented. The proposed material includes a main menu with six themes, which incorporate activities and information related to the natural sciences subject, emphasizing on oscillations and waves topics.

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Diseño de un material didáctico computarizado para la enseñanza de Oscilaciones y Ondas, a partir del estilo de aprendizaje de los estudiantes

This paper presents the development of a Digital Educational Resource, RED, to promote the Rationalz use of Electric Power, UREE, in rural communities. The study population corresponded to 39 students and 3 teachers from a rural educational institution. The contents of the RED were created from the difculties identifed in the initial test, while the presentation formats were prepared based on the interest of the students. Regarding the design of the RED, 87.17% of the students consider it as excellent, because it has a nice and striking appearance, allowing an easy location of the contents and activities. The teachers indicated that the material is adapted to the requirements of the technology area and could even be used in natural sciences, since it deals with a current and interdisciplinary problem. It is concluded that the developed RED has the technical and pedagogical characteristics for UREE learning, providing a didactic alternative for students to explore the subject under the guidance of the teacher.

/pdf/diseno-de-un-recurso-educativo-digital-para-fomentar-el-uso-1iklrtcw4m.pdf

Diseño de un recurso educativo digital para fomentar el uso racional de la energía eléctrica en comunidades rurales

In this article we present the development of a system for the wireless monitoring of climatic variables. The design was made from microchip microcontrollers, which perform the acquisition, storage and wireless transmission of digital signals. Likewise, the microcontroller uses a clock in real time to know the date and time of acquisition of the samples. The hardware also has five channels for connecting sensors and a Micro SD memory for storage of data, along with a Wi-Fi module for wireless monitoring of variables. The information is uploaded to a server that hosts the web page, designed to view the data from any computer with an internet connection. Additionally, an Android application was developed that allows data to be viewed from mobile devices with that operating system.  The performance of the system was satisfactory, after comparing the data acquired with those of two commercial meteorological stations, which served as a pattern. It is concluded that microcontrollers continue to be adequate devices to implement data acquisition systems, which when combined with customized applications, provide competitive solutions at a reasonable cost.

/pdf/monitoreo-de-variables-meteorologicas-a-traves-de-un-sistema-x7tatc16k6.pdf

Monitoreo de variables meteorológicas a través de un sistema inalámbrico de adquisición de datos

Este articulo presenta el control tipo “PIN” para regular la actividad de la red p53-Mdm2. Esta red considera la degradacion de p53 mediada por el incremento de Mdm2, el cual perturba la respuesta de estres normal de p53. El modelo considera tres proteinas: p53, Mdm2 y ARF. p53 es regulado a traves de un ciclo de retroalimentacion que involucra su gen objetivo Mdm2 y un regulador indirecto ARF. Se presentan dos escenarios. Para el primer escenario, la red responde a un incremento de Mdm2 y una baja regulacion de p53 sin ninguna entrada externa; luego, en el segundo escenario apoptosis es inducido por el control tipo “PIN”. El comportamiento dinamico de la red y la efectividad del controlador propuesto son ilustrados via simulaciones.

https://revistas.unipamplona.edu.co/ojs_viceinves/index.php/RCTA/article/download/3020/1645

Degradación anormal de p53 e inducción de apoptosis en la red p53-mdm2 usando la estrategia de control tipo pin

This paper presents a new methodology for the correct design of transformers used in power multilevel inverters common source type. The proposed methodology represents a solution to the problems of distortion in the waveform, voltage drop and loss of efficiency caused by the miscalculation of the transformer using conventional methodology. To validate the methodology two prototypes under different perspectives were built, conventional and proposed, in order to verify the results, which support the solution to the problems described and shown an improvement in performance of the power converter.

/pdf/novel-methodology-for-the-calculation-of-transformers-in-3xj9pzdbnb.pdf

Novel methodology for the calculation of transformers in power multilevel converters

The Autonomous Photovoltaic Solar Systems (APSS), in spite of its disadvantages, offers some inconveniences, being the main one of them, the lack of an energy control system to optimize its operation. This work presents the analysis and design of a Remote Access Supervisor Control System, RASCS for customers with remote access of 500 W photovoltaic solar systems. The RASCS's function is to measure and manage the energy consumed by the users of APSS. For this reason, three main variables are considered: the time of connection and disconnection per load and per day, authorized to the user; the current consumed by each device or charger authorized by the designer; the battery charge level to keep it above the proper amount for proper operation. RASCS here is a system that ensures that it meets the design objectives, monitoring and controlling the critical variables of the customer systems. In this way, it will be possible to remotely diagnose APSS, reducing the time and costs of support and maintenance, with the completion of security, availability, versatility, economy, robustness and reliability to all users of these alternative energy sources.

/pdf/sistema-control-supervisor-de-clientes-con-acceso-remoto-39jw5tbkpj.pdf

Sistema control supervisor de clientes con acceso remoto para sistemas solares fotovoltaicos autónomos

This paper describes the simulation of a three-phase multilevel common source converter of 15-line levels, as variable frequency drive for fed induction motors. The variable frequency drive is optimized in the first 50 harmonic responses; the optimization algorithm was developed in Matlab. The simulation results validate the benefits of this kind of fed induction motor with regard of the power quality in both: voltage and electrical current behaviour.

/pdf/simulacion-del-inversor-multinivel-de-fuente-comun-como-1lqx3cjhl7.pdf

Simulación del inversor multinivel de fuente común como variador de frecuencia para motores de inducción

This paper presents a new methodology for the correct design of transformers used in power multilevel inverters common source type. The proposed methodology represents a solution to the problems of distortion in the waveform, voltage drop and loss of efficiency caused by the miscalculation of the transformer using conventional methodology. To  validate  the  methodology  two  prototypes  under  different  perspectives  were  built,  conventional  and  proposed,  in order to verify the results, which support the solution to the problems described and shown an improvement in performance of the power converter.

/pdf/nueva-metodologia-para-el-calculo-de-transformadores-en-3yx0nsvf2s.pdf

Nueva metodología para el cálculo de transformadores en convertidores de potencia multinivel

This work presents a power converter prepared to easy modify its electrical connections in order to obtain all configurations possibilities of the cascaded multilevel power converter with four H-bridges. Allows to implement both sub-topologies: single CD source and separate DC source, with symmetrical and asymmetrical configurations until 81 voltage levels. All the modifications can be performed using a graphical user interface develop in Matlab®. The modulations are optimized using a genetic algorithm and the system control is a FPGA. The power converter was developed mainly to performing power quality analysis.

Jorge Luis Díaz-Rodríguez

Papers

Novel methodology for the calculation of transformers in power multilevel converters

Sistema control supervisor de clientes con acceso remoto para sistemas solares fotovoltaicos autónomos

Simulación del inversor multinivel de fuente común como variador de frecuencia para motores de inducción

Nueva metodología para el cálculo de transformadores en convertidores de potencia multinivel

A Genetic Optimized Cascade Multilevel Converter for Power Analysis