Comparison of On-Line Partial Discharge Detection Techniques for High Voltage Power Cable Joints and Terminations

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dc.contributor.authorChambela, Prisca Paul
dc.contributor.authorMushi, Aviti Thadei
dc.date.accessioned2023-03-03T18:29:36Z
dc.date.available2023-03-03T18:29:36Z
dc.date.issued2023-02-28
dc.description.abstractCable joints and terminations play a vital role in providing dependable electrical connection, mechanical support and physical safeguard. These provide electrical stress control to shielded power cables. Despite their usefulness, they suffer from partial discharges (PD) because of enhanced voltage stress, moisture ingress and poor workmanship (during installation). Therefore, it is necessary to undertake on-line PD detection to determine their state. Some of these techniques are capacitive coupler (CC); acoustic emission (AE); and high frequency current transducer (HFCT). This article presents a literature review of these techniques based on the cost, availability, and applicability. The comparative analysis is also provided on location of their sensors, quantification and detection ability. The CC technique involves the quantification of the coupler sensor input measured in mV/pC by realizing the time of flight between two sensors for which the results are used to estimate location of the PD. Meanwhile, the AE technique has an advantage of high immunity to electrical noise, with a caveat that acoustic signals are highly attenuated within the cable joints. Additionally, the combination of the acoustic sensors and PD electrical couplers can be used to discriminate PDs from electrical noise. The HFCT has two methods – with denoising (HFCT-WiD) and without denoising (HFCT-WoD). The HFCT-WiD technique can significantly reduce the sensor’s detection sensitivity due to its high value of noise to signal ratio (NSR). Comparatively, the HFCT has the best results of quantification and detection ability for PDs among all three techniques investigated. However, in places where electrical noise is severe, PD activities may be detected effectively with AE technique. Further work is needed to statistically map these methods and establish their correlation with experimental data.en_US
dc.identifier.urihttp://hdl.handle.net/20.500.11810/6014
dc.publisherCollege of Engineering and Technology, University of Dar es Salaamen_US
dc.subjectPartial dischargesen_US
dc.subjectSignal to noise ratioen_US
dc.subjectHigh frequency current transducersen_US
dc.subjectCapacitive coupleren_US
dc.subjectAccoustic emissionen_US
dc.titleComparison of On-Line Partial Discharge Detection Techniques for High Voltage Power Cable Joints and Terminationsen_US
dc.typeJournal Article, Peer Revieweden_US
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