Results 231 to 240 of about 2,083 (260)
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Voltage-Induced Swelling and Deswelling of Weak Polybase Brushes
Langmuir, 2011We have investigated a novel method of remotely switching the conformation of a weak polybase brush using an applied voltage. Surface-grafted polyelectrolyte brushes exhibit rich responsive behavior and show great promise as "smart surfaces", but existing switching methods involve physically or chemically changing the solution in contact with the brush.
Weir, MP +6 more
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Dynamic Control Strategy in Medium Voltage DVR for Mitigating Voltage Sags/Swells
2006 International Conference on Power System Technology, 2006This paper presents control algorithm for dynamic voltage restorer (DVR) to improve voltage quality problems such as voltage sags/swells in distribution systems. When voltage sags/swells occur, possibly, due to faults and some load switching, DVR has to detect the problem and inject appropriate voltage component as soon as possible.
Boonchiam, P., Mithulananthan, Nadarajah
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Voltage dips and swells in Danish distribution grids
CIRED - Open Access Proceedings Journal, 2017 Henrik Hansen, Morten Erlang
exaly +2 more sources
Study on Compensation of Voltage Sag and Voltage Swell by Using DVR (Dynamic Voltage Restorer)
2018 International Conference on Current Trends towards Converging Technologies (ICCTCT), 2018Significant feature for electrical engineering is quality of power in modern days. Due to growing use of solid state, non-linear, power semiconductor switching devices power quality issues are formed. A power quality crisis refers to the problems that are cause by the increase of a non standard voltage or current or frequency.
Riddhi Pandya, FalRuni Bhavsar
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A Generalized Voltage Compensation Strategy for Mitigating the Impacts of Voltage Sags/Swells
IEEE Transactions on Power Delivery, 2005Dynamic restoration of load voltage achieved through the application of voltage-injection technique is considered. The injected voltage is generated from a voltage-source-inverter-based series compensator. It is shown that during a voltage sag, the restoration process almost inevitably requires the injection of energy from the compensator to the ...
S.S. Choi, J.D. Li, D.M. Vilathgamuwa
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Optimization of voltage sag/swell using dynamic voltage restorer (DVR)
2016 International Conference on Electrical, Electronics, and Optimization Techniques (ICEEOT), 2016The most interesting issue for electrical engineers is power quality/power quality improvement in modern era. Power quality is the most noticeable trouble for electrical engineering students. This problem occurs due to occurrence of substandard voltage, may be substandard current, and of frequency which contain harmonics which may damage to power ...
Ragini Saxena, Manorma Kushwah
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Intelligent solid-state voltage restorer for voltage swell/sag and harmonics
IEE Proceedings - Electric Power Applications, 2004Voltage swell/sag along with extended undervoltage conditions and voltage harmonics are of vital concern to the majority of industries today. A neural network control method for the problems of voltage sag/swell and harmonics is proposed. A novel topology of the AC-AC boost converter solves the problems of voltage swell/sag, while a voltage controlled ...
B.N. Singh, M. Simina
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Application of Dynamic Voltage Restorer in microgrid for voltage sag/swell mitigation
2015 IEEE Power, Communication and Information Technology Conference (PCITC), 2015Microgrids are becoming increasingly attractive to consumers as it allows utilization of freely available renewable energy sources. They are usually installed at consumer's sites i.e the distribution end. Due to high penetration of distributed generation units with different types of loads, microgrids can cause power quality and power control issues ...
M.T.L. Gayatri +2 more
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Mitigation of Voltage Swell by Switched Autotransformer with Random Hysteresis Voltage Control
2011 Asia-Pacific Power and Energy Engineering Conference, 2011This paper presents a voltage swell compensator based on a switched autotransformer by random hysteresis voltage control. The advantage of this compensator is that it uses only one controlled switch per phase with no energy storages. Also the control scheme purposed here distributes the harmonic spectrum of the load voltage and reduces its total ...
Hamed Mehranfar +2 more
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Compensation of voltage sags and swells by using Dynamic Voltage Restorer (DVR)
2016 International Conference on Electrical, Electronics, and Optimization Techniques (ICEEOT), 2016The most important aspect for electrical engineering is power quality in recent year. Power quality problem is an event of abnormal voltage, current or frequency. Utility distribution networks experience from various types of disturbances. The major problems dealt here are the voltage sags/swells.
Akanksha V. Ital, Sumit A. Borakhade
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