Acoustic diagnoses of ac corona on the surfaces of insulators

Vahidi, B.; Alborzi, M.J.; Aghaeinia, Hassan; Abedi, Mohsen

doi:10.1109/ptc.2003.1304649

Cited by 10 publications

(4 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several measurement systems have been developed using the corona effect to identify the conservation status of elements subjected to high voltage (HV). The corona effect is detected indirectly based on measurement of conducted current (CHUN et al, 2001), ultraviolet radiation (PINNANGUDI et al, 2002PINNANGUDI et al, 2005), thermographic cameras, sound, and ultrasound (VAHIDI et al, 2003),…”

Section: Theorymentioning

confidence: 99%

High Sensitivity Envelope Detector Assisted by Microwave Photonics

Gonçalves¹,

Ivo²,

Coutinho³

2022

Smart Systems: Theory and Advances

View full text Add to dashboard Cite

Theory and Advances is licensed under CC BY 4.0.This license requires that reuses give credit to the creator. It allows reusers to distribute, remix, adapt, and build upon the material in any medium or format, even for commercial purposes.The content of the work and its data in its form, correctness and reliability are the sole responsibility of the authors, and do not represent the official position of Amplla Publishing. Downloading and sharing of the work is permitted as long as credit is given to the authors. All rights to this edition were ceded to Editora Amplla.

show abstract

Section: Theorymentioning

confidence: 99%

High Sensitivity Envelope Detector Assisted by Microwave Photonics

Gonçalves¹,

Ivo²,

Coutinho³

2022

Smart Systems: Theory and Advances

View full text Add to dashboard Cite

show abstract

“…Each current pulse of a discharge has a unique rise time and carries a unique amount of charge that can be gathered by measuring indirectly or directly the cur rent pulse in an electrical circuit [28][29][30]. Furthermore, each discharge event causes in parallel emissions of sound waves and photons, providing an alternative possibility to gather the information by wideband-, acoustic-, optical-and UHF-based PD measurement procedures [29][30][31][32][33][34][35][36]. These PD events appear as fast current pulses of rise time in nanoseconds and comprise tremendous information which can be analyzed using conventional and non-conventional PD methods.…”

Section: Measuring Surface Dischargesmentioning

confidence: 99%

“…The currently available diagnostic test methods may provide altogether the possibility of an early detection of the surface degradation of the insulator [6,10,[19][20][21][22][23][32][33][34][35]. Naturally, a clear discrimination between wet and dry surface deposition becomes possible [6,19,20].…”

Section: Diagnostic Measurementsmentioning

confidence: 99%

Application of UHF-based partial discharge detection and analysis of tar-polluted insulator of a wet ESP unit

Arumugam¹,

Schröder²,

Neubauer³

2018

Meas. Sci. Technol.

View full text Add to dashboard Cite

This paper investigates partial discharges occurring on the tar-polluted surface of a porcelain insulator through UHF-based non-conventional partial discharge measurements. First a sample is extracted from an actual tar-polluted porcelain insulator, and the UHF signals arising due to partial discharges on the tar-polluted surface are recorded and analyzed. The patterns manifested by the surface discharges are studied and the respective signals are analyzed in time and frequency domain. Once this is accomplished, pertinent findings are validated on an actual porcelain insulator installed in a wet electrostatic precipitator unit. It is expected that the results from the test sample and on-site validation may help in improving existing maintenance strategies, thereby minimizing procedures hazardous to the environment and human life. At the least, the typical response of tar and its influence on the condition of the porcelain insulator must be determined in the macroscopic scale, which still requires deeper investigation.

show abstract

“…The acoustic method is one of the nondestructive diagnostic methods used to measure, detect and localize PD in insulation systems of power facilities. Another advantage of this method is immunity to electromagnetic interference [1].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Partial Discharge in Power Transformers by Acoustic Emission Method and Propagation Modeling of Acoustic Signal

Peimankar¹,

Kazemi²,

Mohammad

et al. 2013

IJOEE

View full text Add to dashboard Cite

Transformers are one of the most important and costly components of any power system. Proper monitoring of the health of a transformer is thus inevitable. Online monitoring of partial discharges (PD) is one of the ways by which the risk of catastrophic failure of a power apparatus can be reduced. Common insulation in power transformers are pressboard and oil. Unconventional PD measurement was developed for several decades ago as a form of PD detection system. In these PD measurement systems that are named unconventional method PD is analyzed by indirect features of this phenomenon, which includes electrical, acoustic, UHF, optical, and chemical methods. The main advantage of unconventional method is the ability of this method in order to decrease the amount of signal to noise ratio for on-site or on-line measurement. A study of the correlation between acoustic emission signals generated by PD and electrical PD charges is inevitable. By developing the speed of measuring devices like digital signal processor (DSP) the possibility of evaluation and calculation of acoustic signals in very short time have been increased. The aim of this paper is evaluation of acoustic signals for two different kind of pressboard (new and aged) with two types of sensors (75 kHz and 150 kHz peak frequency) and simulation of Acoustic Emission (AE) signals propagation which are produced due to PD inside a sample transformer tank by using Finite Element Method (FEM). 

show abstract

Acoustic diagnoses of ac corona on the surfaces of insulators

Cited by 10 publications

References 6 publications

High Sensitivity Envelope Detector Assisted by Microwave Photonics

High Sensitivity Envelope Detector Assisted by Microwave Photonics

Application of UHF-based partial discharge detection and analysis of tar-polluted insulator of a wet ESP unit

Evaluation of Partial Discharge in Power Transformers by Acoustic Emission Method and Propagation Modeling of Acoustic Signal

Contact Info

Product

Resources

About