Partial Discharge Characterization based on Leakage Current Pulses Waveform for Contaminated Glass Insulator String

2016 ◽  
Vol 6 (2) ◽  
pp. 835
Author(s):  
N. A. Othman ◽  
M. A. M. Piah ◽  
Z. Adzis ◽  
Nasir A. Al-geelani
Keyword(s):  
Corona Discharge ◽  
Monitoring System ◽  
Leakage Current ◽  
Partial Discharge ◽  
Surface Discharge ◽  
Performance Tests ◽  
Current Pulses ◽  
Glass Insulator

This paper deals with the analysis of partial discharge (PD) occurrences based on leakage current (LC) pulses distribution under different level of contamination. In this work, laboratory based contamination performance tests are conducted on four units of glass insulator string stacked in I-position. Results show that PD can be characterized (according to their occurrence with respect to the AC supply) as follows: corona discharge occurring dominantly in lightly contaminated insulators, surface discharge occurring dominantly in medium contaminated insulators and finally internal discharge occurring dominantly in heavily contaminated insulators. The ability to distinguish the type of PDs from the LC waveform could be used to monitor and predict the condition of the insulator. The outcome can be incorporated in a conditioning monitoring system.

scholarly journals Partial Discharge Characterization based on Leakage Current Pulses Waveform for Contaminated Glass Insulator String

2016 ◽  
Vol 6 (2) ◽  
pp. 835
Author(s):  
N. A. Othman ◽  
M. A. M. Piah ◽  
Z. Adzis ◽  
Nasir A. Al-geelani
Keyword(s):  
Corona Discharge ◽  
Monitoring System ◽  
Leakage Current ◽  
Partial Discharge ◽  
Surface Discharge ◽  
Performance Tests ◽  
Current Pulses ◽  
Glass Insulator

This paper deals with the analysis of partial discharge (PD) occurrences based on leakage current (LC) pulses distribution under different level of contamination. In this work, laboratory based contamination performance tests are conducted on four units of glass insulator string stacked in I-position. Results show that PD can be characterized (according to their occurrence with respect to the AC supply) as follows: corona discharge occurring dominantly in lightly contaminated insulators, surface discharge occurring dominantly in medium contaminated insulators and finally internal discharge occurring dominantly in heavily contaminated insulators. The ability to distinguish the type of PDs from the LC waveform could be used to monitor and predict the condition of the insulator. The outcome can be incorporated in a conditioning monitoring system.

scholarly journals The Correlation between Surface Tracking and Partial Discharge Characteristics on Pressboard Surface Immersed in MIDEL eN

2017 ◽  
Vol 7 (2) ◽  
pp. 631 ◽  
Author(s):  
Nur Amirah Othman ◽  
Hidayat Zainuddin ◽  
Aminuddin Aman ◽  
Sharin Abd Ghani ◽  
Imran Sutan Chairul
Keyword(s):  
Surface Layer ◽  
Monitoring System ◽  
Condition Monitoring ◽  
Partial Discharge ◽  
Experimental Results ◽  
Surface Discharge ◽  
Discharge Characteristics ◽  
Surface Tracking ◽  
Tracking Process ◽  
Condition Monitoring System

This paper presents the investigation of the surface tracking on pressboard surface immersed in MIDEL eN oil.  In this work, the development of surface discharge was analyzed by correlating the visual records of surface tracking on impregnated pressboard and the partial discharge (PD) activities.  The PD activities during the surface tracking process were analyzed in terms of Phase Resolved Partial Discharge (PRPD) patterns.  Throughout the experiment, surface discharge is found as the development of tree-like patterns in the form of white marks occurring on the oil-pressboard interface.  This phenomenon is generally accepted as the drying out process that involves evaporation and decomposition of the oil molecules in the pressboard pores due to the surface discharge activities on the pressboard surface layer.  The development of surface discharge on the pressboard surface can continue from minutes to months or even years until failure.  Thus, condition monitoring system is important to characterize this type of faulty condition.  The experimental results show that there is the decreasing trend of PD magnitude during the development of white mark hallway of a gap distance which is eventually suffered from an unexpected fault.

scholarly journals Computer–Based Monitoring System for Analysing Surface Leakage Current in an IEC 587 Test Set–Up

2012 ◽  
Author(s):  
Md. Afendi Md. Piah ◽  
Ahmad Darus
Keyword(s):  
Monitoring System ◽  
Leakage Current ◽  
Surface Discharge ◽  
Test Set ◽  
Insulating Materials ◽  
Surface Leakage Current ◽  
On Line ◽  
Computer Based ◽  
Set Up ◽  
Surface Leakage

Surface discharge is a common electrical discharge that normally occurs on outdoor insulators under wet and contaminated conditions. The dry–band discharge exists because of the leakage current that flows on the insulator surface. Measuring the surface leakage current can identify the performance of insulating materials as well as the characteristics of discharges. A computer–based on–line monitoring of surface leakage current is found to be more practical due to the long period of time taken in conducting the laboratory test. This paper describes the design and development of a leakage current monitoring system associated with surface tracking and erosion resistance test set–up of IEC 587. The LabVIEW software package is used to develop a measurement program for recording and analysing leakage current signals. Experimental works have shown the capability of the developed system in detecting the performance of insulating materials as well as identifying the characteristics of the surface discharges. Besides the on–line monitoring function, a data storage feature is also added to the system to allow for further analysis. Key words: surface discharge; leakage current; signal analysis; virtual instrument program

Decomposition Characteristics of C3F7CN/EP With Different Partial Discharge Intensities on Surface Discharge

2021 ◽  
Author(s):  
Guohui Hao ◽  
Qiulin Zhao ◽  
Shaoli Zhang ◽  
Cong Wang ◽  
Xin Ai ◽  
...  
Keyword(s):  
Partial Discharge ◽  
Surface Discharge

scholarly journals Sensitivity Calibration of UHF Partial Discharge Monitoring System in GIS

2002 ◽  
Vol 122 (11) ◽  
pp. 1226-1231
Author(s):  
Tatsuro Kato ◽  
Fumihiro Endo ◽  
Shingo Hironaka
Keyword(s):  
Monitoring System ◽  
Partial Discharge ◽  
Discharge Monitoring
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