ABSTRACT This paper presents the development work done for virtualization of a typical high voltage laboratory especially named as virtual high voltage laboratory. The main objective of the paper is to develop an understanding of rectangular pulse current generator’s circuit parameters’ effect on the standard output waveforms. The most significant part includes analyses of various internal cons...

This paper introduces the indicators for surge arrester condition assessment based on the leakage current analysis. Maximum amplitude of fundamental harmonic of the resistive leakage current, maximum amplitude of third harmonic of the resistive leakage current and maximum amplitude of fundamental harmonic of the capacitive leakage current were used as indicators for surge arrester condition mon...

At present, UHV surge arresters have a large number of sections and complex structures. The existing live detection online monitoring technologies can no longer effectively determine the problem deterioration internal resistance arrester. This paper studies structure, power supply, temperature humidity measurement wireless transmission methods measuring probes that be placed in arrester for lon...

The paper considers the possibility of improving technical characteristics gas surge arresters for co-ordination insulation at low voltage, medium voltage and high levels. idea a arrester is based on application radioactive source 241Am in area cathode. Intensive ionization with alpha particles significantly increases number free electrons space between electrodes, which shortens time their tra...

Accurate modeling and parameters identification of Metal Oxide Surge Arrester (MOSA) are very important for arrester allocation, systems reliability and insulation coordination studies. Several models with acceptable accuracy have been proposed to describe this behavior. It should be mentioned that the estimation of nonlinear elements of MOSAs is very important for all models. In this paper, a ...

in this paper, intelligent water drop algorithm (iwd) is used to analyze single overhead line connected to grid-grounded arrester. in this approach, at first norton’s equivalent circuit of the overhead line over lossy soil is computed by method of moments (mom) and then for the problem under consideration, a nonlinear equivalent circuit in the frequency domain is proposed. finally applying inte...

A study has been made of the fatigue-crack propagation properties of a series of laminated Nbreinforced Nb3Al intermetallic-matrix composites with varying microstructural scale but nominally identical reinforcement volume fraction (20 pct Nb). It was found that resistance to fatigue-crack growth improved with increasing metallic layer thickness (in the range 50 to 250 mm) both in the crack-divi...