Results 221 to 230 of about 258,257 (262)

Research on a Novel Dynamic Voltage Quality Regulator in Medium Voltage

2009 International Conference on Energy and Environment Technology, 2009
In accordance with the familiar power quality problem, such as voltage sag, flicker, harmonic suppression and short circuit fault, this paper designed a novel series voltage quality regulator in medium voltage for the multiple objective control basing on the cascaded multilevel H-bridge method, and analysis its working principle in detail.
Yajing Di, Zhongdong Yin, Xiangning Xiao, Renzhong Shan   +3 more
openaire   +1 more source

Quality Assurance for Josephson Array Voltage Standards

IEEE Transactions on Instrumentation and Measurement, 2011
A series of quality assurance (QA) procedures for the Josephson array voltage standard (JAVS) has been implemented to improve the efficiency and quality of dc voltage measurements in the National Metrology Centre, Agency for Science, Technology, and Research (A*STAR), Singapore.
Yinzhu Zhou, Sze Wey Chua, Jinni Lee, Yueyan Shan   +3 more
openaire   +1 more source

Adaptive filtering for voltage quality control in industrial system

1999 IEEE Africon. 5th Africon Conference in Africa (Cat. No.99CH36342), 2003
The active compensation of voltage fluctuations in industrial subsystems is considered. A solution based on an adaptive control of a fullbridge rectifier is proposed to compensate voltage fluctuations at supplying busbars. The controller is realized on an adaptive filtering scheme, which allows a real-time identification of the voltage disturbance.
MARINO, Pompeo, IULIANO G, LO SCHIAVO A, TESTA, Alfredo   +3 more
openaire   +3 more sources

Voltage Quality Improvement Using DVR

2010 International Conference on Recent Trends in Information, Telecommunication and Computing, 2010
The problem of voltage sags and Swells and its severe impact on sensitive loads is well known. To solve this problem, custom power devices are used. One of those devices is the Dynamic Voltage Restorer (DVR), which is one of the most efficient and effective modern custom power devices used in power distribution networks.
M. Arun Bhaskar, S.S. Dash, C. Subramani, M. Jagadeesh Kumar, P.R. Giresh, M. Varun Kumar   +5 more
openaire   +1 more source

A novel voltage quality monitoring system

2004 IEEE International Conference on Electric Utility Deregulation, Restructuring and Power Technologies. Proceedings, 2004
With the advent of electricity deregulation, the power quality of electricity supply is getting more and more concern. Customers prefers to have a good electricity supply. In this paper, a novel voltage monitoring system based on a compact microprocessor module is presented.
W.L. Tse, W.L. Chan
openaire   +1 more source

Voltage quality in urban and rural areas

2012 IEEE International Symposium on Electromagnetic Compatibility, 2012
The number of power distribution user networks feeding energy efficient equipment is growing. The situation is becoming even more complex with the introduction of distributed generation. The network connects non-linear electronic loads, as well as sources.
Timens, R.B., Buesink, Frederik Johannes Karel, Leferink, Frank Bernardus Johannes   +2 more
openaire   +2 more sources

Voltage quality improvement in distribution networks

2007 9th International Conference on Electrical Power Quality and Utilisation, 2007
This paper is presented by Chilectra, a subsidiary of the Endesa Group Spain and the biggest electric utility in Chile. It sets out a methodology for estimating and determining control parameters for the voltage quality to be delivered to its end customers. The methodology is able to estimate the voltage at each end customer location in the low voltage
Zuniga Reyes, Cristian Andres
openaire   +1 more source

Improved voltage quality through advances in voltage control techniques

7th International Conference on Developments in Power Systems Protection (DPSP 2001), 2001
It is incumbent upon power utilities to maintain customers' supplies within specified parameters under varying conditions of load. In the vast majority of cases, the last point at which the power utility can influence the voltage is the on-load tap-changer (OLTC).
openaire   +1 more source

Voltage quality bounds of multilevel converters

2012 IEEE International Energy Conference and Exhibition (ENERGYCON), 2012
Multilevel converters feature a staircase voltage waveform, resulting in a high voltage quality. By a practical time domain approach, upper and lower bounds of the voltage quality can be derived as closed form analytical expressions. The voltage quality bounds are introduced for single- and three-phase converters with an arbitrary number of voltage ...
Gert Mehlmann, Alex Ruderman, Gerhard Herold   +2 more
openaire   +1 more source

Influence of voltage stability in power quality

2010 9th IEEE/IAS International Conference on Industry Applications - INDUSCON 2010, 2010
Simulations and analysis of voltage stability and its influence on power quality are presented in this article. The voltage stability concern to the capacity of the power system to maintain an appropriate voltage profile, both in normal operation and in the event of severe disruption.
Ana Vitoria de Almeida Macedo, Benedito Antonio Luciano, Wellington Santos Mota   +2 more
openaire   +1 more source