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Abstract-With the arrival of new hardware and software technologies, supervisory control and data acquisition human-machine interfaces (SCADA/HMI), usually text-based, can now benefit from the advantages the inclusion of multimedia information brings. However, due to the special requirements imposed by such systems, integrating audio and video data into the SCADA interfaces is not a trivial task. In this document we analyze those special characteristics and propose solutions so this integration is possible in power systems communication.

This paper presents the use of a predictive technique to control the currents in a PMSM, driven by a voltage source inverter. This method allows for a high quality current control without using linear controllers and modulators, resulting in a conceptually simple solution.Simulation an experimental results confirm the good performance of the drive controlled by this method.

RESUMENEl Calorímetro de Argón Líquido en ATLAS es alimentado por convertidores DC/DC localizados cerca de sus compartimientos. Ellos son alimentados por convertidores AC/DC localizados en una sala de control lejana conectados mediante cables largos de poder. La estabilidad del sistema de distribución es sensible a la impedancia del cable largo de interconexión y son requeridos los convertidores apropiados para estabilizar la dinámica de la impedancia. También, el cable largo alimentado por el convertidor AC/DC es una fuente de interferencia electromagnética en el área experimental. En este trabajo se analiza la óptima con guración de aterrizamiento y blindaje para minimizar los efectos de EMI.Palabras clave: Compatibilidad electromagnética, sistema de distribución de corriente continua, estabilidad, propagación de ruido, emisiones de interferencia electromagnética. ABSTRACTThe front-end electronics of the ATLAS Liquid Argon Calorimeter is powered by DC/DC converters nearby the front-end crates. They are fed by AC/DC converters located in a remote control room through long power cables. The stability of the power distribution scheme is compromised by the impedance of the long interconnection cable, and proper matching of the converters dynamic impedances is required. Also, the long power cable fed by a powerful AC/DC converter is a source of electromagnetic interferences in the experimental area. The optimal grounding and shielding con guration to minimize these EMI is discussed.

This research aims to evaluate the trends in the publication of papers on issues related to power circuit breakers, aimed at the technologies implemented, as well as those countries with higher level of publications, making a comparison between authors, research institutes, and a description of the last 10 years with more publications. All the information found in this report is compiled in bibliographic databases such as books of substation designs and research papers with a focus on electrical protection equipment and emphasis on high voltage switching devices. A technology research is conducted over the last ten years to analyze the state of the art of high voltage operating elements with respect to new technologies.