The Experts below are selected from a list of 1311 Experts worldwide ranked by ideXlab platform
Sánchez Mora, María Lourdes - One of the best experts on this subject based on the ideXlab platform.
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Diseño del plan de mantenimiento de la instalación eléctrica de un centro de datos
'Universitat Politecnica de Valencia', 2018Co-Authors: Sánchez Mora, María LourdesAbstract:[EN] The aim of this Project is to design the maintenance program of the electric installation of a data center. The program will include all the electrical verifications that must be carried out in the different parts, such as electric panelboards, electric lines, switchgear, backup generators, Uninterruptible Power Systems, transformer substation and auxiliary equipment. The project will have a section that will include real electric verifications and tests that will be carried out in the considered installation in the context of the designed program.[ES] En el presente trabajo se pretende abordar el diseño del plan de mantenimiento de la instalación eléctrica de un centro de datos. El plan incluirá las verificaciones eléctricas que deben efectuarse sobre la diferentes partes de la instalación como cuadros eléctricos, líneas y aparamenta, grupos electrógenos, sistema de alimentación ininterrumpida, centro de transformación y otros equipos auxiliares. El proyecto incluirá un epígrafe en el que se detallan verificaciones reales efectuadas sobre la instalación considerada en el marco del plan de mantenimiento diseñado.Sánchez Mora, ML. (2018). Diseño del plan de mantenimiento de la instalación eléctrica de un centro de datos. http://hdl.handle.net/10251/112187TFG
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Diseño del plan de mantenimiento de la instalación eléctrica de un centro de datos
'Universitat Politecnica de Valencia', 2018Co-Authors: Sánchez Mora, María LourdesAbstract:[EN] The aim of this Project is to design the maintenance program of the electric installation of a data center. The program will include all the electrical verifications that must be carried out in the different parts, such as electric panelboards, electric lines, switchgear, backup generators, Uninterruptible Power Systems, transformer substation and auxiliary equipment. The project will have a section that will include real electric verifications and tests that will be carried out in the considered installation in the context of the designed program.[ES] En el presente trabajo se pretende abordar el diseño del plan de mantenimiento de la instalación eléctrica de un centro de datos. El plan incluirá las verificaciones eléctricas que deben efectuarse sobre la diferentes partes de la instalación como cuadros eléctricos, líneas y aparamenta, grupos electrógenos, sistema de alimentación ininterrumpida, centro de transformación y otros equipos auxiliares. El proyecto incluirá un epígrafe en el que se detallan verificaciones reales efectuadas sobre la instalación considerada en el marco del plan de mantenimiento diseñado.Sánchez Mora, ML. (2018). Diseño del plan de mantenimiento de la instalación eléctrica de un centro de datos. Universitat Politècnica de València. http://hdl.handle.net/10251/112187TFG
Francisco Antonio Marino Salotti - One of the best experts on this subject based on the ideXlab platform.
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Power quality and energy efficiency assessment and the need for labelling and minimum performance standard of Uninterruptible Power Systems ups in brazil
Energy Policy, 2012Co-Authors: Ildo Luis Sauer, Hedio Tatizawa, Francisco Antonio Marino SalottiAbstract:The poor quality of electrical Power in Brazil has led to an increase in the sales of Power conditioning equipment such as Uninterruptible Power Systems (UPS) to supply a voltage wave shape without distortion or interruption. However, there are indications that the average performance of the UPS equipment available in the Brazilian market requires some improvement. Information about the energy-related behaviour of UPS units is scarce. In this paper, we estimate and analyse the installed capacity of UPS units and assess their Power consumption, losses and impact on the Power quality in the electrical system. The analysis is performed through energy efficiency and Power quality measurements performed on UPS units that are commonly available in Brazil. We estimate the energy conservation potential of the UPS. The results of assessments strongly support the need for public policies for energy efficiency and Power quality improvements, particularly the labelling of UPS units and the introduction of minimum performance standards for UPS devices.
J Hirose - One of the best experts on this subject based on the ideXlab platform.
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a unity Power factor pwm rectifier with dc ripple compensation
IEEE Transactions on Industrial Electronics, 1997Co-Authors: Toshihisa Shimizu, T Fujita, Gunji Kimura, J HiroseAbstract:This paper presents a new topology for a pulsewidth modulation (PWM) rectifier which achieves unity Power factor on the AC supply side and ripple reduction on the DC output side. The main circuit of this rectifier consists of a conventional PWM rectifier and a pair of additional switches. The switches and PWM rectifier are controlled such that the ripple current on the DC line is reduced, and unity Power factor is achieved on the AC line. As a result, this circuit does not require a large DC capacitor or a passive LC resonant circuit. Furthermore, control of the additional switches and PWM rectifier requires only a simple control circuit. The effectiveness of this circuit was confirmed by experiments and analysis. The rectifier is useful for Uninterruptible Power Systems (UPSs) and DC Power supplies, especially for cases in which batteries are connected to the DC line.
Toshihisa Shimizu - One of the best experts on this subject based on the ideXlab platform.
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DC ripple current reduction on a single-phase PWM voltage source rectifier
Conference Record of the 1999 IEEE Industry Applications Conference. Thirty-Forth IAS Annual Meeting (Cat. No.99CH36370), 1999Co-Authors: Toshihisa Shimizu, Y. Jin, Gunji KimuraAbstract:A novel topology of single-phase pulsewidth modulation (PWM) voltage-source rectifier capable of achieving not only a sinusoidal input current, but also a zero-ripple output current, is presented. The rectifier consists of a conventional single-phase PWM voltage-source rectifier, a pair of additional switches and an inductor. Hence, the proposed rectifier requires neither a large DC capacitor nor a passive L-C resonant circuit. The input current control is achieved by the conventional PWM current control technique. However, DC ripple current reduction control is difficult because one of the switching legs in the DC ripple current reduction circuit is shared with the PWM rectifier circuit. Two control methods, referred to here as the DC C inductor method and the AC inductor method, are proposed for DC ripple reduction, and the characteristics of these control methods are discussed. These control methods are implemented using a microprocessor, and the effectiveness of the circuit is confirmed experimentally. This rectifier has useful applications in Uninterruptible Power Systems and DC Power supplies, especially for cases in which the batteries are connected in parallel to the DC line.
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a unity Power factor pwm rectifier with dc ripple compensation
IEEE Transactions on Industrial Electronics, 1997Co-Authors: Toshihisa Shimizu, T Fujita, Gunji Kimura, J HiroseAbstract:This paper presents a new topology for a pulsewidth modulation (PWM) rectifier which achieves unity Power factor on the AC supply side and ripple reduction on the DC output side. The main circuit of this rectifier consists of a conventional PWM rectifier and a pair of additional switches. The switches and PWM rectifier are controlled such that the ripple current on the DC line is reduced, and unity Power factor is achieved on the AC line. As a result, this circuit does not require a large DC capacitor or a passive LC resonant circuit. Furthermore, control of the additional switches and PWM rectifier requires only a simple control circuit. The effectiveness of this circuit was confirmed by experiments and analysis. The rectifier is useful for Uninterruptible Power Systems (UPSs) and DC Power supplies, especially for cases in which batteries are connected to the DC line.
Ildo Luis Sauer - One of the best experts on this subject based on the ideXlab platform.
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Power quality and energy efficiency assessment and the need for labelling and minimum performance standard of Uninterruptible Power Systems ups in brazil
Energy Policy, 2012Co-Authors: Ildo Luis Sauer, Hedio Tatizawa, Francisco Antonio Marino SalottiAbstract:The poor quality of electrical Power in Brazil has led to an increase in the sales of Power conditioning equipment such as Uninterruptible Power Systems (UPS) to supply a voltage wave shape without distortion or interruption. However, there are indications that the average performance of the UPS equipment available in the Brazilian market requires some improvement. Information about the energy-related behaviour of UPS units is scarce. In this paper, we estimate and analyse the installed capacity of UPS units and assess their Power consumption, losses and impact on the Power quality in the electrical system. The analysis is performed through energy efficiency and Power quality measurements performed on UPS units that are commonly available in Brazil. We estimate the energy conservation potential of the UPS. The results of assessments strongly support the need for public policies for energy efficiency and Power quality improvements, particularly the labelling of UPS units and the introduction of minimum performance standards for UPS devices.
