Results 31 to 40 of about 10,700 (291)
Sensitivity of Low-Voltage Variable-Frequency Devices to Voltage Sags
IEEE Access, 2019 Variable frequency drives (VFDs) are the types of power electronic device commonly used to drive motors with a wide range of industrial and practical applications, especially in power systems.
Yonghai Xu +4 more
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International Journal of Electrical Power & Energy SystemsVoltage sags often disrupt the normal functioning of sensitive equipment and distributed generators (DGs), making voltage sag mitigation based on corresponding assessments crucial. Voltage sag characteristics, including voltage magnitude and sag duration,
Xian-yong Xiao +3 more
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Measurement + Control, 2020 The voltage sag problem in a power grid can be solved by a voltage regulator. In this study, the voltage regulator based on thyristor was used to compensate the single-phase and three-phase voltage of voltage sag fault, so as to recover the normal level ...
Zonglu Zhang
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Zhongguo dianli, 2020 For realizing marketization of voltage sag governance, two major problems need to be solved: lowering the investment cost and reasonably setting the service fee.
Bo ZHANG +5 more
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Design and Control of Modular Multilevel Converter for Voltage Sag Mitigation
Energies, 2022 Voltage sag in a power system is an unavoidable power quality issue, and it is also an urgent concern of sensitive industrial users. To ensure the power quality demand and economical operation of the power system, voltage sag management has always drawn ...
Fazal Muhammad +4 more
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Voltage Sag Compensation Using Dynamic Voltage Restorer
International Journal of Engineering and Advanced Technology, 2019 Power quality plays a very important vital role in the modern utility grid where sensitive loads are employed. Equipment damage, temporary shutdowns, product quality degradation and Voltage Sag are the major problem associated with power quality. Dynamic Voltage Restorer (DVR) is a powerful device which is used to improve voltage mitigation of weak ...
D. Arulselvam* +3 more
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Sex Hormones Associate With Amyotrophic Lateral Sclerosis Risk and Survival
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Amyotrophic lateral sclerosis (ALS) risk differs by sex and age, implicating sex hormones as potential modifiers. This study examined plasma levels of biologically active sex hormones and their association with ALS odds and survival in cases (females n = 131, males n = 189) and controls (females n = 138, males n = 150) from the University of ...
Stephen A. Goutman +5 more
wiley +1 more source
A comprehensive evaluation method of DC voltage sag in medium–low voltage DC distribution system
Energy Reports, 2022 The development of the DC distribution system (DCDS) has attracted increasing attention, due to its technological superiorities in integrating new energy sources and DC power loads more friendly and effectively.
Zhenqiang Li +5 more
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Arthritis Care &Research, Accepted Article.Objectives Sjögren's disease is an autoimmune disorder that can impact multiple organ systems, including the peripheral nervous system (PNS). PNS manifestations, which can exist concurrently, include mononeuropathies, polyneuropathies, and autonomic nervous system neuropathies. To help patients and providers in the decision‐making process, we developed
Anahita Deboo +19 more
wiley +1 more source
Advanced Engineering Materials, EarlyView.This article provides an overview of recent advancements in bulk processing of rare‐earth‐free hard magnetic materials. It also addresses related simulation approaches at different scales. The research on rare‐earth‐free magnetic materials has increased significantly in recent years, driven by supply chain issues, environmental and social concerns, and
Daniel Scheiber, Andrea Bachmaier
wiley +1 more source