New method for measurement of the resistive leakage currents of metal-oxide surge arresters in service

A Wireless System for Monitoring Leakage Current in Electrical Substation Equipment

“…Condition monitoring of these devices can be achieved by measuring the on-line of leakage current. Leakage current combined with signal processing techniques is a reliable diagnostic tool which provides useful information on the state of the surge arrester [23][24]. Commercial devices are available for condition monitoring of surge arresters [25,26], but these are not ideal for continuous monitoring applications.…”

An improved time-delay addition method for MOSA resistive leakage current extraction under applied harmonic voltage

“…Surge arresters are known to exhibit an increase in the fundamental and third harmonics of the resistive current in relation with the arrester's operating time [7][8][9][10][11]. Therefore, the extraction of resistive current and its harmonic components is required for proper condition assessment.…”

“…Several methods such as capacitive current compensation method (CCCM) [9,8,17], the point-on-wave method (POWM) [18], the resistive current wave shape-based http://dx.doi.org/10.1016/j.measurement.2015.09.027 0263-2241/Ó 2015 Elsevier Ltd. All rights reserved. method (RCWM) [6], the harmonic analysis method (HAM) [19] and the current orthogonality method (COM) [20] are used to extract the resistive current of the MOSA.…”

“…For condition monitoring of surge arresters, many off-line and on-line techniques have been presented in literature such as: power loss method [5], V-I characteristic curve analysis [6], leakage current measurement [7][8][9][10][11], temperature measurement [12][13][14] and electro-magnetic field measurement [15,16].…”

Condition Monitoring of Zinc Oxide Surge Arresters

“…When R 1 and C changes, the capacitive current (I c ), and the resistive current (I r ) also change. The arrester's leakage current, in particular, the third harmonic component of the resistive leakage current, is known to be directly related to the degree of degradation of the ZnO arrester (Lundquist et al, 1990;Spellman et al, 1997;Zhou et al, 1998;Tang et al, 1999). In this work, in order to extract the resistive component from the total leakage current, the shifted current method ) was used.…”