Results 171 to 180 of about 3,842 (216)

Special Requirements on Gas-Insulated, Metal-Oxide Surge Arresters

2006 International Conference on Power System Technology, 2006
Equipment in high voltage power systems can be protected effectively by metal oxide surge arresters. Basically two different types of surge arresters are used: surge arresters with air insulation using porcelain or polymeric housings (AIS surge arresters) and surge arresters with SF6-insulation using a metallic housing (GIS surge arresters).
R. Gohler, L. Klingbeil
openaire   +1 more source

Metal-oxide surge arrester's leakage current analysis and thermography

2013 International Symposium on Lightning Protection (XII SIPDA), 2013
Metal-Oxide arresters are used to protect substation's equipment against surges. Because their constructive properties, a small current, called leakage current, flows through them in normal operation condition. The resistive part of this current is a good indicator of the arrester's degradation state and is also responsible for its heating.
Wagner A. M. Ursine, Jose L. Silvino, Leonardo G. Fonseca, Roberto M. de Andrade   +3 more
openaire   +1 more source

Search for new diagnostics for metal oxide surge arrester

Proceedings of the 6th International Conference on Properties and Applications of Dielectric Materials (Cat. No.00CH36347), 2002
A new diagnostic technique called "return voltage measurement" is investigated to assess its effectiveness for monitoring degradation in metal oxide blocks. The return voltage measurement was conducted on a number of distribution class zinc-oxide arresters. The findings from these measurements are described in this paper.
K.P. Mardira, M. Darveniza, T.K. Saha
openaire   +1 more source

Comparison of different metal oxide surge arrester models

International journal of emerging sciences, 2011
Two methods for modeling metal oxide surge arresters are presented and compared: the IEEE Working Group 3.4.11 surge arrester model and the simplified surge arrester model proposed by Pinceti and Giannettoni. The comparison of model performances and accuracy is conducted in the program package EMTP – RV.
Lovrić, Dino, Vujević, Slavko, Modrić, Tonći   +2 more
openaire   +3 more sources

Pressure Relief Design and Performance of Metal Oxide Surge Arresters

IEEE Transactions on Power Delivery, 1986
Surge arresters with porcelain housing must not have explosive breakage of the housing to minimize damage to other equipment when subjected to internal high short circuit currents. Also, arrester porcelain housings are generally susceptible to undesirable thermal shock.
J. Ozawa, A. Mizukoshi, S. Maruyama, K. Nakano, K. Sahto, G. St-Jean, Y. Latour, A. Pet   +7 more
openaire   +1 more source

A new monitoring system for metal oxide surge arresters

11th International Symposium on High-Voltage Engineering (ISH 99), 1999
For on-line monitoring of MO-surge arresters a system has been developed, that monitors and evaluates the performance characteristics of surge arresters. During normal operation without surge events, the peak values of the leakage currents and line voltages as well as the ambient temperature are measured and stored in periodic time intervals. In larger
openaire   +1 more source

Study of high frequency characteristics of Metal Oxide Surge arrester

2015 International Conference on Trends in Automation, Communications and Computing Technology (I-TACT-15), 2015
Metal Oxide Surge arresters are subjected to continuous operating voltages and transient voltages. In the gapless metal oxide surge arresters a leakage current flows through the arrester at working voltages. The leakage current increases as the temperature of the arrester block increases.
null Leela A M, V Muralidhara, K N Ravi, N Vasudev, R S Shivakumara Aradhya   +4 more
openaire   +1 more source

Parameter optimisation of support vector machine using mutant particle swarm optimisation for diagnosis of metal-oxide surge arrester conditions

Journal of experimental and theoretical artificial intelligence (Print), 2018
This paper proposes an enhanced support vector machine (SVM), whose parameters are optimised by a novel mutant particle swarm optimisation (mutant PSO) algorithm to identify metal-oxide surge arrester conditions.
Chien-Nan Chen, Thom Thi Hoang, M. Cho
semanticscholar   +1 more source

A New Parameter Estimation Algorithm for Metal Oxide Surge Arrester

Electric Power Components and Systems, 2011
Abstract The modeling and exact determination of metal oxide surge arrester parameters are very important for arrester allocation, insulation coordination studies, and systems reliability calculations. In this article, a new method, which is a combination of particle swarm optimization and ant colony optimization methods, is proposed to obtain the ...
M. Nafar, G. B. Gharehpetian, T. Niknam
openaire   +1 more source

Measurement Method for Resistive Current Components of Metal Oxide Surge Arrester in Service

IEEE Transactions on Power Delivery, 2018
As an important power system protection device, the condition of metal oxide surge arresters (MOSAs) in service could be monitored, and online monitoring might be considered in a few critical installations.
Zhongjun Fu, Jianyu Wang, A. Bretas, Yun Ou, Genyuan Zhou   +4 more
semanticscholar   +1 more source