Design Of A Non Isolated Single Phase Online Ups Topology With Parallel Battery Bank For Low Power Applications
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Design Of A Non Isolated Single Phase Online Ups Topology With Parallel Battery Bank For Low Power Applications
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Author : Muhammad Aamir
language : en
Publisher: Springer
Release Date : 2018-07-14
Design Of A Non Isolated Single Phase Online Ups Topology With Parallel Battery Bank For Low Power Applications written by Muhammad Aamir and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-07-14 with Technology & Engineering categories.
This book presents a new topology of the non-isolated online uninterruptible power supply (UPS) system consisting of 3 components: bridgeless boost rectifier, battery charger/discharger, and an inverter. The online UPS system is considered to be the most preferable UPS due to its high level of power quality and proven reliability against all types of line disturbances and power outages. The new battery charger/discharger reduces the battery bank voltage, which improves performance and reliability, while a new control method for the inverter regulates the output voltage for both linear and nonlinear loads. The proposed USP system shows an efficiency of 94% during battery mode and 92% during the normal mode of operation.
Fuel Cell Based Battery Less Ups System
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Author : Mirunalini Venkatagiri Chellappan
language : en
Publisher:
Release Date : 2008
Fuel Cell Based Battery Less Ups System written by Mirunalini Venkatagiri Chellappan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.
With the increased usage of electrical equipment for various applications, the demand for quality power apart from continuous power availability has increased and hence requires the development of appropriate power conditioning system. A major factor during development of these systems is the requirement that they remain environment-friendly. This cannot be realized using the conventional systems as they use batteries and/or engine generators. Among various viable technologies, fuel cells have emerged as one of the most promising sources for both portable and stationary applications. In this thesis, a new battery less UPS system configuration powered by fuel cell is discussed. The proposed topology utilizes a standard offline UPS module and the battery is replaced by a supercapacitor. The system operation is such that the supercapacitor bank is sized to support startup and load transients and steady state power is supplied by the fuel cell. Further, the fuel cell runs continuously to supply 10% power in steady state. In case of power outage, it is shown that the startup time for fuel cell is reduced and the supercapacitor bank supplies power till the fuel cell ramps up from supplying 10% load to 100% load. A detailed design example is presented for a 200W/350VA 1- phase UPS system to meet the requirements of a critical load. The equivalent circuit and hence the terminal behavior of the fuel cell and the supercapacitor are considered in the analysis and design of the system for a stable operation over a wide range. The steady state and transient state analysis were used for stability verification. Hence, from the tests such as step load changes and response time measurements, the non-linear model of supercapacitor was verified. Temperature rise and fuel consumption data were measured and the advantages of having a hybrid source (supercapacitor in parallel with fuel cell) over just a standalone fuel cell source were shown. Finally, the transfer times for the proposed UPS system and the battery based UPS system were measured and were found to be satisfactory. Overall, the proposed system was found to satisfy the required performance specifications.
Handbook On Battery Energy Storage System
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Author : Asian Development Bank
language : en
Publisher: Asian Development Bank
Release Date : 2018-12-01
Handbook On Battery Energy Storage System written by Asian Development Bank and has been published by Asian Development Bank this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-12-01 with Technology & Engineering categories.
This handbook serves as a guide to deploying battery energy storage technologies, specifically for distributed energy resources and flexibility resources. Battery energy storage technology is the most promising, rapidly developed technology as it provides higher efficiency and ease of control. With energy transition through decarbonization and decentralization, energy storage plays a significant role to enhance grid efficiency by alleviating volatility from demand and supply. Energy storage also contributes to the grid integration of renewable energy and promotion of microgrid.
Investigation Of Ups Topologies For Personal Computer Backup
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Author : Richard Morrison
language : en
Publisher:
Release Date : 2000
Investigation Of Ups Topologies For Personal Computer Backup written by Richard Morrison and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Computer engineering categories.
This research addresses the development of optimal designs of Uninterruptible Power Systems (UPS's) for use in the backup of computers. In the first phase, a design for external UPS, which is not integrated with the computer power supply, is proposed. The second phase concerns the design of a UPS which also acts as the power supply for the computer, termed an integrated UPS. Given the increasing levels of commerce carried out through the global computer network, it is likely that priority would be given to the server computer in considering the provision of uninterrupted power in the case of the majority of computer networks. Thus, the internal UPS design proposed, is specified for usage in server computers. The external UPS configuration is based on an ac/dc converter composed of an unisolated, two switch buck-boost ad/dc stage, integrated with a bidirectional, isolated dual active bridge dc/dc stage. The use of this converter facilitates the realisation of the system using a single, high frequency isolation transformer. Furthermore, the UPS peak power rating is minimised by including a dc/ac converter which delivers a trapezoidal shaped voltage to the load, the slope of the output voltage transitions may be adjusted such that the crest factor of the output current is close to unity. A modified version of the external UPS topology is investigated for the internal application. It is envisaged that the progressive reduction in integrated circuit supply voltages because of the increasing logic switching rates will likewise cause UPS battery voltages to be reduced. Thus the dc/dc stage is realised using a bidirectional version of the asymmetric duty cycle, half-bridge converter in order to minimise capacitor ripple current ratings. A modulation strategy for the buck-boost stage input switch is developed which minimises the power rating of the switches.
Lightning Protection Guide
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Author : Dehn + Söhne (Neumarkt i.d. OPf.)
language : en
Publisher:
Release Date : 2014
Lightning Protection Guide written by Dehn + Söhne (Neumarkt i.d. OPf.) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.
Emerging Power Converters For Renewable Energy And Electric Vehicles
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Author : Md. Rabiul Islam
language : en
Publisher: CRC Press
Release Date : 2021-05-30
Emerging Power Converters For Renewable Energy And Electric Vehicles written by Md. Rabiul Islam and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-05-30 with Technology & Engineering categories.
This book covers advancements of power electronic converters and their control techniques for grid integration of large-scale renewable energy sources and electrical vehicles. Major emphasis is on transformer-less direct grid integration, bidirectional power transfer, compensation of grid power quality issues, DC system protection and grounding, interaction in mixed AC/DC systems, AC and DC system stability, design of high-frequency high power density systems with advanced soft magnetic materials, modeling and simulation of mixed AC/DC systems, switching strategies for enhanced efficiency, and protection and reliability for sustainable grid integration. This book is an invaluable resource for professionals active in the field of renewable energy and power conversion. Md. Rabiul Islam received his PhD from the University of Technology Sydney (UTS), Australia. He was appointed as a Lecturer at Rajshahi University of Engineering & Technology (RUET) in 2005 and promoted to full-term Professor in 2017. In early 2018, he joined the School of Electrical, Computer, and Telecommunications Engineering, University of Wollongong, Australia. He is a Senior Member of IEEE. His research interests include the fields of power electronic converters, renewable energy technologies, power quality, electrical machines, electric vehicles, and smart grids. He has authored or coauthored more than 200 publications including 50 IEEE Transactions/IEEE Journal papers. He has been serving as an editor for IEEE Transactions on Energy Conversion and IEEE Power Engineering Letters, and associate editor for IEEE Access. Md. Rakibuzzaman Shah is a Senior Lecturer with the School of Engineering, Information Technology and Physical Science at Federation University Australia. He has worked and consulted with distribution network operators and transmission system operators on individual projects and has done collaborative work on a large number of projects (EPSRC project on multi-terminal HVDC, Scottish and Southern Energy multi-infeed HVDC) - primarily on the dynamic impact of integrating new technologies and power electronics into large systems. He is an active member of the IEEE and CIGRE. He has more than 70 international publications and has spoken at the leading power system conferences around the world. His research interests include future power grids (i.e., renewable energy integration, wide-area control), asynchronous grid connection through VSC-HVDC, application of data mining in power system, distribution system energy management, and low carbon energy systems. Mohd. Hasan Ali is currently an Associate Professor with the Electrical and Computer Engineering Department at the University of Memphis, USA, where he leads the Electric Power and Energy Systems (EPES) Laboratory. His research interests include advanced power systems, smart-grid and microgrid systems, renewable energy systems, and cybersecurity issues in modern power grids. Dr. Ali has more than 190 publications, including 2 books, 4 book chapters, 2 patents, 60 top ranked journal papers, 96 peer-reviewed international conference papers, and 20 national conference papers. He serves as the editor of the IEEE Transactions on Sustainable Energy and IET-Generation, Transmission and Distribution (GTD) journal. Dr. Ali is a Senior Member of the IEEE Power and Energy Society (PES). He is also the Chair of the PES of the IEEE Memphis Section.
Oil And Gas Production Handbook An Introduction To Oil And Gas Production
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Author : Havard Devold
language : en
Publisher: Lulu.com
Release Date : 2013
Oil And Gas Production Handbook An Introduction To Oil And Gas Production written by Havard Devold and has been published by Lulu.com this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with Gas fields categories.
Igbt Modules
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Author : Andreas Volke
language : en
Publisher:
Release Date : 2012
Igbt Modules written by Andreas Volke and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Insulated gate bipolar transistors categories.
Uninterruptible Power Supplies And Active Filters
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Author : Ali Emadi
language : en
Publisher: CRC Press
Release Date : 2017-12-19
Uninterruptible Power Supplies And Active Filters written by Ali Emadi and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-12-19 with Technology & Engineering categories.
As industry power demands become increasingly sensitive, power quality distortion becomes a critical issue. The recent increase in nonlinear loads drawing non-sinusoidal currents has seen the introduction of various tools to manage the clean delivery of power. Power demands of medical facilities, data storage and information systems, emergency equipment, etc. require uninterrupted, high quality power. Uninterruptible power supplies (UPS) and active filters provide this delivery. The first to treat these power management tools together in a comprehensive discussion, Uninterruptible Power Supplies and Active Filters compares the similarities of UPS, active filters, and unified power quality conditioners. The book features a description of low-cost and reduced-parts configurations presented for the first time in any publication, along with a presentation of advanced digital controllers. These configurations are vital as industries seek to reduce the cost of power management in their operations. As this field of power management technology continues to grow, industry and academia will come to rely upon the comprehensive treatment found within this book. Industrial engineers in power quality, circuits and devices, and aerospace engineers as well as graduate students will find this a complete and insightful resource for studying and applying the tools of this rapidly developing field.
Advanced Concepts For Renewable Energy Supply Of Data Centres
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Author : Jaume Salom
language : en
Publisher: CRC Press
Release Date : 2022-09-01
Advanced Concepts For Renewable Energy Supply Of Data Centres written by Jaume Salom and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-09-01 with Technology & Engineering categories.
The rapid increase of cloud computing, high performance computing (HPC) and the vast growth in Internet and Social Media use have aroused the interest in energy consumption and the carbon footprint of Data Centres. Data Centres primarily contain electronic equipment used for data processing (servers), data storage (storage equipment), and communications (network equipment). Collectively, this equipment processes, stores, and transmits digital information and is known as information technology (IT) equipment. Advanced Concepts for Renewable Energy Supply of Data Centres introduces a number of technical solutions for the supply of power and cooling energy into Data Centres with enhanced utilisation of renewable energy sources in order to achieve low energy Data Centres. Because of the high energy density nature of these unique infrastructures, it is essential to implement energy efficiency measures and reduce consumption before introducing any renewable energy source. A holistic approach is used with the objective of integrating many technical solutions such as management of the IT (Information Technology) load, efficient electrical supply to the IT systems, Low-Ex air-conditioning systems, interaction with district heating and cooling networks, re-use of heat, free cooling (air, seawater, groundwater), optimal use of heat and cold storage, electrical storage and integration in smart grids. This book is therefore a catalogue of advanced technical concepts that could be integrated into Data Centres portfolio in order to increase the overall efficiency and the share of renewable energies in power and cooling supply. Based on dynamic energy models implemented in TRNSYS some concepts are deeply evaluated through yearly simulations. The results of the simulation are illustrated with Sankey charts, where the energy flows per year within the subsystems of each concept for a selected scenario are shown, and graphs showing the results of parametric analysis. A set of environmental metrics (as the non-renewable primary energy) and financial metrics (CAPEX and OPEX) as well of energy efficiency metrics like the well-known PUE, are described and used to evaluate the different technical concepts.