Results 291 to 300 of about 1,715,225 (335)

Detecting transient voltage stability and voltage sag

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, 2004
This paper presents method to discriminate between transient voltage stability and voltage sag. The discrete wavelet transform (WT) is a powerful tool in the analysis of the transient phenomena in power systems because of its ability to extract information in both the time and frequency domain.
Jurado, Francisco, Saenz, José Ramón
openaire   +2 more sources

Voltage sag source location based on instantaneous energy detection

Electric Power Systems Research, 2008
Voltage sag is a major power quality problem, which could disrupt the operation of voltage-sensitive equipment. This paper presents the method based on variation components-based instantaneous energy for voltage sag source detection.
Kong, Wei, Chen, Zhe; id_orcid, Dong, Xinzhou   +2 more
exaly   +1 more source

Real-time voltage sag detection and classification for power quality diagnostics

, 2020
This work proposes an innovative approach to detect, segment and classify voltage sags according to their causes. To detect and segment, Independent Component Analysis is used, with the advantage of being fast and with low computational effort in the ...
Erick A. Nagata, D. Ferreira, M. Bollen, B. Barbosa, E. G. Ribeiro, C. Duque, P. Ribeiro   +6 more
semanticscholar   +1 more source

Improved DR and CBM methods for finding relative location of voltage sag source at the PCC of distributed energy resources

, 2020
The presence of distributed energy resources (DERs) such as inverter based distributed generations (IBDGs) in active distribution systems has a significant effect on the location of voltage sag sources.
Younes Mohammadi, R. Leborgne
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

Method to Select Optimal Device for Mitigating Voltage Sag Based on Voltage Sag Assessment

The Transactions of The Korean Institute of Electrical Engineers, 2015
This paper presents a method to select optimal device for mitigating voltage sags. The method is based on economic evaluation and voltage sag assessment involving sag duration as well as magnitude. The economic evaluation is performed by using the operation cost and economic benefit of the mitigation devices.
Kyebyung Lee, Jong-Hoon Han, Gilsoo Jang, Chang-Hyun Park   +3 more
openaire   +1 more source

A fast single-phase voltage sag detection for voltage sag compensation system

TENCON 2014 - 2014 IEEE Region 10 Conference, 2014
This paper proposes a fast single-phase voltage sag detection for voltage sag compensation system. The operation of proposed method is based on synchronously rotating reference frame which provides fast and accurate voltage sag detection. a proposed fast single-phase voltage sag detection uses the differentiator as a (−90)-degree phase shifter to ...
openaire   +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 detection - A survey

2009 International Conference for Technical Postgraduates (TECHPOS), 2009
Voltage sag has been the focus of considerable research in recent years. It can cause expensive downtime. Research on voltage sag detection has also grown up and it is an essential part of the voltage sag compensator. There are many methods have been introduced to measure and detect voltage sags.
Muhamad Mansor, Nasrudin Abdul Rahim
openaire   +1 more source

Stochastic Characterization of Voltage Sag Occurrence Based on Field Data

IEEE Transactions on Power Delivery, 2019
Computational methods for predicting voltage sags consider their occurrence as a Poisson process, although without confirmation from monitoring data, until now.
A. Santos, Tiago Rosa, M. T. Correia de Barros   +2 more
semanticscholar   +1 more source