An assessment of a square-wave series voltage compensator increasing low voltage ride through capability on industrial electronic loads
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Universidade Federal de Minas Gerais
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This paper addresses a study of Dynamic Voltage Restorers (DVRs) and Series Voltage Compensators (SVCs) applied to voltage surge protection and able to maintain the voltage on susceptible loads. The restorer is applied on industrial environments when reliability of drives and electronics systems is desired, avoiding stops by voltage surges and problems from electrical grid, such as voltage sags. It is estimated that power quality problems generate production losses and downtime in manufacturing process at industries, in consequence of sensible loads to voltage variation, simplified solutions will be presented for this concern. First, the conventional sinusoidal dynamic voltage restorer will be cited, and then, three simplified topologies will be discussed, with the proposal of a square-wave series voltage compensator (SW-SVC) able to compensate voltage sags with improved cost-efficiency. The design includes a description of the inherent system parts, such as the coupling transformer, harmonic filter at the output of the static power converter, the converter configuration and its semiconductors, the input rectifier, grid synchronization system. Then will be discussed the performance analysis mitigating voltage sags, increasing Low Voltage Ride Through (LVRT) of electronic loads and improving industrial power quality.
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Afundamento de tensão, Eletrônica de potência, Indústria - Brasil
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Power quality , Industries , Rectifiers , Voltage control , Electrical engineering , Static VAr compensators , Topology, voltage sag , power quality , PQ , dynamic voltage restorer , DVR , square-wave series voltage compensators , SW-SVC , Low Voltage Ride Through , LVRT, Low Voltage , Square Wave , Electronic Load , Voltage Compensation , Power Grid , Simple Solution , Industrial Environment , Power Conditions , Power Quality , Voltage Spikes , Voltage Sag , High Voltage , Personal Computer , DC Voltage , Financial Losses , Voltage Levels , Fast Switching , Electronic Equipment , Semiconductor Industry , Programmable Logic Controllers , Phase-locked Loop , Grid Voltage , Under Voltage , Cause Of Defects , Output Filter , Original Equipment Manufacturers , Rectifier Stage , Turns Ratio
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https://ieeexplore.ieee.org/document/8627073