Results 311 to 320 of about 1,560,331 (368)

Voltage Sag Studies in Distribution Networks—Part II: Voltage Sag Assessment

IEEE Transactions on Power Delivery, 2006
This paper is the second part of a joint paper aimed at predicting the voltage sag performance of distribution networks by estimating voltage sag indices. This part explores the characteristics of voltage sags caused by faults in a distribution network considering the effect of the protective devices installed in the network.
J.A. Martinez, J. Martin-Arnedo
openaire   +1 more source

Stability Analysis and Enhancement of Type-4 Wind Turbines Connected to Very Weak Grids Under Severe Voltage Sags

IEEE transactions on energy conversion, 2019
Modern grid codes require wind turbines (WTs), e.g., type-4 WTs, to have low voltage ride-through (LVRT) capability, and recently, great attention has been attracted on the stability issues of WTs during the period of the LVRT.
Hui Yuan, H. Xin, Linbin Huang, Zhen Wang, Di Wu   +4 more
semanticscholar   +1 more source

Voltage sag stochastic estimate

Conference Record of the 2001 IEEE Industry Applications Conference. 36th IAS Annual Meeting (Cat. No.01CH37248), 2002
The probabilistic nature of the electromagnetic phenomenon that characterizes a voltage sag makes the establishment of tendencies based only upon monitoring results quite a difficult work to be done. Simulations of short circuits deterministically predict their behavior in various types and situations of possible short circuits.
M.F. Alves, V.R.C. Fonseca
openaire   +1 more source

Active and Reactive Power Injection Strategies for Three-Phase Four-Wire Inverters During Symmetrical/Asymmetrical Voltage Sags

IEEE transactions on industry applications, 2019
Electric grid codes are expected to change in near future to accommodate an increased number of distributed generation units in the distribution power system without impairing its power quality.
D. Brandão, Frederico E. G. Mendes, Reginaldo V. Ferreira, S. Silva, I. Pires   +4 more
semanticscholar   +1 more source

Voltage sag analysis through wavelet transform

MELECON '98. 9th Mediterranean Electrotechnical Conference. Proceedings (Cat. No.98CH36056), 2002
The objective of the paper is an in-depth voltage sag characterization. Attention is turned in particular to detect the frequency range associated to the main transients contained in the voltage waveform during sag. A suitable tool for this study is the wavelet transform, which allows decomposition of a transient signal into a series of wavelet ...
QUAIA, STEFANO, PASTORE, STEFANO, TORELLI, LUCIO   +2 more
openaire   +2 more sources

International Coordination for Voltage Sag Indices

2005/2006 PES TD, 2005
This paper proposes a general five-step framework for obtaining system indices for voltage dip performance. The framework is used to describe existing standards and ongoing work in standard-setting organizations (IEC, IEEE, CIGRE). Using the framework it becomes clear where the missing links are towards system-wide performance indices for voltage dips.
M.H.J. Bollen, D.D. Sabin
openaire   +1 more source

Load modeling for voltage sag studies

2003 IEEE Power Engineering Society General Meeting (IEEE Cat. No.03CH37491), 2004
This paper investigates the influence of load modeling on voltage sag characteristics and compares the results of voltage sag calculation with different load models. It is shown that some voltage sag characteristics are strongly influenced by the models chosen for representing power system loads.
Martinez, Juan A., Martin-Arnedo, Jacinto, Milanovic, Jovica V.   +2 more
openaire   +1 more source

Sensitivity of Programmable Logic Controllers to Voltage Sags

IEEE Transactions on Power Delivery, 2019
This paper discusses the sensitivity of programmable logic controllers (PLCs) to voltage sags based on mechanistic analysis and numerous tests. First, the sag sensitivity caused by different values of rated working voltage is shown through an analysis of
Yonghai Xu, Yapen Wu, Mengmeng Zhang, Shaobo Xu   +3 more
semanticscholar   +1 more source

Voltage Sag Studies in Distribution Networks—Part III: Voltage Sag Index Calculation

IEEE Transactions on Power Delivery, 2006
Power quality indices have been developed to assess the performance of a single site or an entire system. They can guide utilities to improve their systems and can be used by manufacturers to decide about equipment immunity. This paper is the third part of a joint paper aimed at predicting the voltage sag performance of distribution networks by ...
J.A. Martinez, J. Martin-Arnedo
openaire   +1 more source

Voltage sag: Malaysian's experience

POWERCON '98. 1998 International Conference on Power System Technology. Proceedings (Cat. No.98EX151), 2002
Voltage sag is one of the major components of power quality of an electric power system. In Malaysia, transmission system's disturbance becomes a dominant source. Voltage sag affects every customer, however, industrial customers are the most affected.
B. Sawir, M.R. Ghani, A.A. Zin, A.H. Yatim, H. Shaibon, K.L. Lo   +5 more
openaire   +1 more source