quinta-feira, 27 de outubro de 2016
High-Performance Control of Three-Phase Four- Wire DVR Systems using Feedback Linearization Seon-Yeong Jeong*, Thanh Hai Nguyen**, Quoc Anh Le**, and Dong-Choon Lee†
High-Performance Control of Three-Phase Four- Wire DVR Systems using Feedback Linearization Seon-Yeong Jeong*, Thanh Hai Nguyen**, Quoc Anh Le**, and Dong-Choon Lee† *Department of Research and Development, T.E.C.C. Co. Ltd., Daegu, Korea **,†Department of Electrical Engineering, Yeungnam University, Gyeongsan, Korea
Abstract
Power quality is a critical issue in distribution systems, where a dynamic voltage restorer (DVR) is commonly used to mitigate the voltage disturbances for loads. This paper deals with a nonlinear control for the three-phase four-wire (3P-4W) DVR under a grid voltage unbalance and nonlinear loads in the distribution system, where a novel control scheme based on the feedback linearization technique is proposed. Through feedback linearization, a nonlinear model of a DVR with a PWM voltage-source inverter (VSI) and LC filters is linearized. Then, the controller design of the linearized model is performed by applying the linear control theory, where the load voltages are kept constant by controlling the d-q-0 axis components of the DVR output voltages. To keep the load voltage unchanged, an in-phase compensation strategy is employed, where the load voltages are recovered to be the same as the previous voltage without a change in the magnitude. With this strategy, the performance of the DVR becomes faster and more stable even under unbalanced source voltages and nonlinear loads. The validity of the proposed control strategy has been verified by simulation and experimental results.
Key words: Dynamic voltage restorers, feedback linearization, SOGI-PLL, three-phase four-wire VSI, voltage unbalance
LINK: http://ocean.kisti.re.kr/downfile/volume/kipe/E1PWAX/2016/v16n1/E1PWAX_2016_v16n1_351.pdf
quarta-feira, 26 de outubro de 2016
Power Modules for Combining Innovation, Flexibility and Power Capability in the Various 3-Level Topologies - By Narender Lakshmanan and Thomas Radke, Mitsubishi Electric Europe
Three level topologies have demonstrated higher efficiencies, filter optimization potential and the capability of handling high DC-link voltages. To maximize the advantages offered by the 3-level topologies, Mitsubishi Electric offers new power modules which unlock the potential to realize innovative solutions for different power segments. By Narender Lakshmanan and Thomas Radke, Mitsubishi Electric Europe B.V. and Satoshi Kawabata, Mitsubishi Electric Corporation Japan Power Device Works.
LINK ORIGINAL EN LA WEB
https://www.hy-line.de/fileadmin/Public/Power/hersteller/mitsubishi/dokumente/BPs_04-16_Mitsubishi.pdf
sexta-feira, 21 de outubro de 2016
Livre : Circuits électriques - Presses de l'Université de Laval - HOANG LE-HUY
LINK ORIGINAL EN LA WEB
http://www.biblio-scientifique.net/2015/11/livre-circuits-electriques-presses-de.html
LINK DIRECTO TELECHARGER
https://drive.google.com/open?id=0Bx7ahSnE_GyvcEREZGJMcXNUTTA
LINK ALTERNATIVO PDF
http://www.mediafire.com/file/5bc4n3y7tj7mud5/Circuits_Electriques-HOANG_LE_HUY.pdf
Exercices et Problèmes corrigés d'Electronique Analogique - ALI GHARSALLAH,TAHAR BEN NASRALLAH
quinta-feira, 20 de outubro de 2016
KOLFF en ExpoPreve Duoc San Joaquín
KOLFF nuevamente se hace presente en el evento Expo Preve 2016 de Duoc UC. En esta oportunidad la actividad se realizó en la sede San Joaquín del Instituto, en la cual se hizo presente gran cantidad de expertos en Seguridad, junto a cientos de alumnos de las carreras de Ingeniería y Técnico en Prevención de Riesgos. Como empresa nos sentimos orgullosos de apoyar la formación de estos jóvenes que se integrarán prontamente a la Industria nacional.
FUENTE ORIGINAL DE LA NOTICIA
http://kolff-e.com/2016/10/07/kolff-en-expopreve-duoc-san-joaquin/
quarta-feira, 19 de outubro de 2016
BIRNS Emergency Light Fixture-LED Seismic Testing
This video shows BIRNS Emergency Light Fixture-LEDs (ELF-LEDs) during IEEE-344 seismic qualification testing at the National Technical Systems facility. This demanding test sequence uses a tri-axial acceleration table delivering the equivalent of a seismic event at 10Gs of force in the x, y and z axes.
BIRNS ELF-LEDs are advanced, seismically qualified nuclear grade lighting systems that provide 24-40 hours of standby illumination in the event of loss of AC power, which is 3 to 5 times longer than required by the NRC. These rugged, CE marked, RoHS compliant systems have a lamp life of 50,000 hours, and an 11 W power draw.
quarta-feira, 12 de outubro de 2016
Simulación de circuitos electróncos con PSpice Juan Aguilar
LINK ORIGINAL
https://issuu.com/jaguilarpena/docs/seminario
LINK ALTERNATIVO DIRECTO
http://www.mediafire.com/file/uk2kboxden1kn3o/Seminario.pdf
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