Results 261 to 270 of about 760,879 (293)
Some of the next articles are maybe not open access.
Characterizing voltage sags and swells using three-phase voltage ellipse parameters
2014 IEEE Industry Application Society Annual Meeting, 2014This paper presents an algorithm for detection, classification, and characterization of voltage sags and swells in electricity networks using three-phase voltage ellipse parameters. The proposed method employs the instantaneous magnitude of three-phase voltage signals in three axes, which are separated from each other by 120..
Mollah R. Alam +2 more
openaire +6 more sources
Extended Voltage Swell Ride-Through Capability for PWM Voltage-Source Rectifiers
IEEE Transactions on Industrial Electronics, 2002Voltage swells are one of the most harmful voltage disturbances for static power converters. A supply voltage increase may severely damage or trip converters, causing production and revenue losses. In the case of the PWM voltage source rectifier, a swell causes saturation of its control system, followed by a transition to 6-pulse operation that leaves ...
Rolando Burgos, Eduardo P. Wiechmann
openaire +2 more sources
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
openaire +3 more sources
Compensation of Voltage Swell by Using STATCOM
2018In power system, power quality is one of the important aspects as power quality problems are occurred due to occurrence of voltage swell, voltage sag, transient, harmonics distortion, etc. in the transmission line. Out of these, voltage swell has less predominantly occurred and creates severe impact on transmission line and sensitive devices connected
Singare, Abhijit R. +3 more
openaire +1 more source
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
openaire +3 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
openaire +1 more source
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
openaire +1 more source
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
openaire +1 more source
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
openaire +1 more source
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
openaire +1 more source