New Techniques for Field Inspection of Medium Voltage Surge Arresters

Oliveira, H.R.P. de; Martinez, M.L.B.; Campos, I.G.; Oliveira, Rafael Guilen de; Salles, C. de; Lefort, Christine

doi:10.1109/pct.2007.4538289

Cited by 5 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Equation (4) determines only the resistive component of harmonics, which in the case of voltage harmonics is a better indicator than total current for the aforementioned reasons. However, (4) implies that operating voltage harmonics are in phase with resistive leakage current harmonics. In the real case, this is not satisfied, and hence the application of this method of harmonic analysis leads to error.…”

Section: Har Methodsmentioning

confidence: 99%

“…Calculate resistive current and resistive voltage using (15) and (16). 4. Check if the resistive current is in phase with resistive voltage (using cross-correlation).…”

Section: Iter Methodsmentioning

confidence: 99%

“…Metal-oxide surge arresters (MOSAs) play an important role in preventing such emergency situations and in preserving the reliability of EPS. During their lifetime, electrical characteristics of MOSAs irreversibly change due to a number of factors [1][2][3][4]. All of these changes can lead to MOSA failure.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Experimental verification of monitoring techniques for metal‐oxide surge arrester

Dobrić

Stojković

Stojanović

2020

IET Generation, Transmission & Distribution

View full text Add to dashboard Cite

Section: Har Methodsmentioning

confidence: 99%

“…Calculate resistive current and resistive voltage using (15) and (16). 4. Check if the resistive current is in phase with resistive voltage (using cross-correlation).…”

Section: Iter Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Experimental verification of monitoring techniques for metal‐oxide surge arrester

Dobrić

Stojković

Stojanović

2020

IET Generation, Transmission & Distribution

View full text Add to dashboard Cite

“…Nowadays, the determination of the condition of gapless MO arresters is achieved using many alternative methods, such as ultrasonic and radio interference detection [9], partial discharge and electromagnetic radiation measurement [10,11], thermovision methods [12] and certainly the leakage current measurement. As it has already been mentioned earlier, the majority of diagnostic methods are based on the measurements of the leakage current.…”

Section: Methods and Diagnostic Testsmentioning

confidence: 99%

Measurement of the resistive leakage current in surge arresters under artificial rain test and impulse voltage subjection

Christodoulou

Avgerinos

Ekonomou

et al. 2009

IET Sci. Meas. Technol.

View full text Add to dashboard Cite

Surge arresters are installed on transmission and distribution lines and in substations between phase and earth in order to improve the lightning performance and reduce the failure rates. High-energy stresses and housing deterioration are the main factors of degradation and damage of surge arresters. Thus, there is need for testing and monitoring the electrical network's arresters, in order to verify their good condition and their ability to effectively protect the lines. The most common method used, is the measurement of the arresters' total leakage current (with the isolation of the resistive part), which is an indicator of the arrester's condition, since every change, deterioration or damage leads to an increase of the resistive leakage current. In the current work, the total leakage current of two 20 kV ZnO surge arresters without gaps is measured and the resistive component for three different cases (brand new arresters, measurements under artificial rain and measurements after impulse voltage subjection) is computed. The analysis of the produced results can be useful in correct diagnosis of arresters' condition and in more effective schedule maintenance, since any recorded high-resistive currents do not necessarily result arrester's repair or replacement.

show abstract

“…Over the past years researchers have conducted many research studies related to aging and degradation of SAs by developing online and offline based monitoring techniques and indicators. Many methods for the determination of arresters' conditions have been presented such as V-I characteristic curve analysis [7], partial discharge and electromagnetic radiation measurement [12]- [13], ultrasonic and radio interference detection [14] and certainly the leakage current (LC) measurement where, the majority of diagnostic methods are based on the total leakage current (TLC) magnitude and harmonics measurements [15]- [32].…”

Section: Introductionmentioning

confidence: 99%

Internal and External Leakage Current Decomposition of Surge Arresters Using Discrete Fourier Transform

Almomani¹

2019

IJATCSE

View full text Add to dashboard Cite

Surge arresters are over voltage protection devices that provide protection to power transmission and distribution systems from over voltages caused by lightning surges, switching operations in power systems and temporary over voltages caused by faults. However, they are subjected to aging due to environmental conditions and overheating. Therefore to avoid catastrophic failures of surge arresters, it is necessary to evaluate their performance either by online monitoring or offline testing of the resistive leakage current which is considered as one of most techniques for assessing the degradation level of surge arresters. This paper presents an efficient technique for decomposition of leakage currents of surge arresters using discrete Fourier transform. The paper aims to decompose the leakage current, either internal or external, into its resistive and capacitive components. After, separating the two current components, the third harmonic resistive current, which is considered an important indicator of SA degradation, is extracted from the resistive current component. In this paper, diagnosis of three different 33 kV, 10 kA distribution-class surge arresters, namely Zinc Oxide Polymeric-, Zinc Oxide Silicon Rubber-and Silicon Carbide Porcelain-housed surge arresters is presented. Both the internal and the external currents were measured for each arrester up to its maximum continuous operating voltage.

show abstract

New Techniques for Field Inspection of Medium Voltage Surge Arresters

Cited by 5 publications

References 0 publications

Experimental verification of monitoring techniques for metal‐oxide surge arrester

Experimental verification of monitoring techniques for metal‐oxide surge arrester

Measurement of the resistive leakage current in surge arresters under artificial rain test and impulse voltage subjection

Internal and External Leakage Current Decomposition of Surge Arresters Using Discrete Fourier Transform

Contact Info

Product

Resources

About