Results 321 to 330 of about 1,578,109 (354)

Optimization of voltage sag/swell using dynamic voltage restorer (DVR)

2016 International Conference on Electrical, Electronics, and Optimization Techniques (ICEEOT), 2016
The 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

Mitigation of Voltage Sags and Swells by Dynamic Voltage Restorer

Advanced Materials Research, 2013
This paper presents the modelling and simulation of Dynamic Voltage Restorer (DVR) for mitigation of voltage sags and swells which are the major problems and issues on non linear loads.The Dynamic Voltage Restore (DVR) has become popular as a cost effective solutions for the protection of sensitive loads from voltage sags and swells..
Shakti Prasad Mishra, Lisby Varghese, J. Preetha Roselyn, D. Devaraj   +3 more
openaire   +1 more source

An Advanced Control Strategy for a Weak Grid-Connected DG for Enhancing Voltage Support During Co-occurrence of Sag and Swell

IEEE transactions on power electronics
Numerous control strategies for voltage support are developed to encounter the voltage issues (sag, swell, low voltage, and high voltage). Yet, there is a significant gap in the voltage support concept, such as reduction of zero-sequence voltage along ...
Suresh Maganti, N. P. Padhy
semanticscholar   +1 more source

AC chopper dynamic voltage swells restorer design

Proceedings of The 7th International Power Electronics and Motion Control Conference, 2012
This article presents a novel design of voltage swells restorer using transformer and PWM AC chopper. The proposed dynamic voltage restorer uses an ac chopper converter to generate compensation voltage and adopts the transformer to isolate the power converter from the load.
Nan Jin, null Jiang Su-xia, null Cui Guang-zhao   +2 more
openaire   +1 more source

Mitigation of voltage dips and voltage swells by STATCOM/BESS

2006 China International Conference on Electricity Distribution (CICED 2006), 2006
A static synchronous compensator (STATCOM) with battery energy storage system (BESS) can be used to mitigate voltage dip/swell by injecting/absorbing active and reactive power to the point of connection with the grid. For this application, the dynamic performances of STATCOM/BESS are important since the load will not maintain normal operation if it is ...
null Jie Zeng, null Buhan Zhang, null Chengxiong Mao, null Yunling Wang   +3 more
openaire   +1 more source

Voltage SAG/SWELL mitigation using AC chopper

2013 International Conference on Circuits, Power and Computing Technologies (ICCPCT), 2013
A new topology is proposed here to compensate voltage sags in power systems. One of the major power quality issues encountered by industries is the voltage sag. To compensate sag, a new topology is designed without storage device. This sag adjuster is capable of compensating deep and long duration voltage sag.
M Vikash., M.K Ilampoornan., A.M Dhaarini.   +2 more
openaire   +1 more source

Characteristics of Voltage Swell in Multigrounded Systems

IEEE Transactions on Power Delivery, 2007
The effects of multigrounded neutral (MGN) in three-phase distribution systems are not easy to analyze due to the presence of a fourth conductor-the neutral and its multigrounded arrangement. As a result, the mechanism of voltage swell in MGN feeders becomes difficult to understand.
Janak Acharya, Wilsun Xu
openaire   +1 more source

Voltage-Induced Swelling and Deswelling of Weak Polybase Brushes

Langmuir, 2011
We 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, Heriot, SY, Martin, SJ, Parnell, AJ, Holt, SA, Webster, JRP, Jones, RAL   +6 more
openaire   +3 more sources

A Neural Network-Based Control Strategy for Three-Phase Four-Leg Dynamic Voltage Restorer for Both Voltage Sag/Swell and Harmonic Compensation

Prague Stringology Conference, 2019
Conventional dynamic voltage restorers are based on three-phase inverters, which are unable to compensate unbalanced voltage; therefore, in this paper, a four-leg three-phase inverter topology is employed to be used in DVR structure to compensate both ...
Sahand Liasi, M. Bina
semanticscholar   +1 more source

Intelligent solid-state voltage restorer for voltage swell/sag and harmonics

IEE Proceedings - Electric Power Applications, 2004
Voltage 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