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Journal ArticleDOI

Review: Uninterruptible Power Supply (UPS) system

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TLDR
In this paper, a comprehensive review of UPS topologies, circuit configurations, and different control techniques used in the UPS system is presented and compared based on the performance, size, cost, and efficiency of the system.
Abstract
Uninterruptible Power Supplies (UPS) have reached a mature level by providing clean and uninterruptible power to the sensitive loads in all grid conditions. Generally UPS system provides regulated sinusoidal output voltage, with low total harmonics distortion (THD), and high input power factor irrespective of the changes in the grid voltage. This paper provides comprehensive review of UPS topologies, circuit configurations, and different control techniques used in the UPS system. A comparison based on the performance, size, cost, and efficiency of the system is presented. Different hybrid energy source UPS system and new generation UPS system for smart grid and micro-grid has been explained. Finally the paper describes performance evaluation of UPS system and explains different aspects that are to be considered for choosing a suitable UPS system by the user.

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Citations
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Lithium-Ion Battery Storage for the Grid—A Review of Stationary Battery Storage System Design Tailored for Applications in Modern Power Grids

TL;DR: In this article, the authors present a review of battery energy storage systems for serving grid support in various application tasks based on real-world projects and their characteristics with respect to performance and aging.
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Active power filter (APF) for mitigation of power quality issues in grid integration of wind and photovoltaic energy conversion system

TL;DR: In this paper, the most advanced active power filters (APFs) were evaluated by reducing the number of power switches and focus on the reduction of cost, size, and weight of grid-connected inverters.
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Review of System Integration and Control of Proton Exchange Membrane Fuel Cells

TL;DR: This review will comprehensively present existing research based on four aspects, including fuel cell stacks, subsystems, system integration and control strategy optimizations, to fully understand the coupling effects of different factors on the overall performance and durability of PEMFCs.
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Evaluation of grid-level adaptability for stationary battery energy storage system applications in Europe

TL;DR: Simulation results show that grid challenges, addressed by battery storage systems in low-voltage grids, have positive multiplicative impacts on upper grid levels, reducing local grid demand and lowering power peak stress.
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Resonant power converters with respect to passive storage (LC) elements and control techniques – An overview

TL;DR: The principles of resonant power converters (RPCs) and their classifications based on their DC-DC converter family, and ability to achieve soft switching are presented.
References
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Journal ArticleDOI

The path of the smart grid

TL;DR: The electrical power industry is undergoing rapid change as discussed by the authors, and the major drivers that will determine the speed at which such transformations will occur will be the rising cost of energy, the mass electrification of everyday life, and climate change.
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Z-source inverter

TL;DR: The Z-source converter employs a unique impedance network to couple the converter main circuit to the power source, thus providing unique features that cannot be obtained in the traditional voltage-source (or voltage-fed) and current-source converters where a capacitor and inductor are used, respectively.
Journal ArticleDOI

Energy storage systems—Characteristics and comparisons

TL;DR: In this paper, the main characteristics of different electricity storage techniques and their field of application (permanent or portable, long- or short-term storage, maximum power required, etc.).
Journal ArticleDOI

Proportional-resonant controllers and filters for grid-connected voltage-source converters

TL;DR: The proportional-resonant (PR) controllers and filters, and their suitability for current/voltage control of grid-connected converters, are described in this article.
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