On-line partial discharge measurement on high voltage power cables

Phung, B.T.; Blackburn, TR; James, R.E.

doi:10.1049/cp:19990859

Cited by 7 publications

(2 citation statements)

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“…2) Acoustic Sensing: Partial discharge (PD) measurement is an important diagnostic tool, especially for medium-and highvoltage cables, where local intensity of electric stress can reach breakdown values. A broad range of PD measurement techniques includes acoustic, current, and voltage [27], [28], electromagnetic [29], time-and frequency-domain reflectrometry [30], and optical sensing [31]. Acoustic sensing is very successful for switchgear and transformers [32], [33], because it is free from electrical interference, very easy to apply, has no need to power down, and does not require additional components, such as high-voltage capacitors [34].…”

Section: B Evaluation Of the Electrical Insulation Statusmentioning

confidence: 99%

Robotic Monitoring of Power Systems

Jiang

Mamishev

2004

IEEE Trans. Power Delivery

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Monitoring of electric power systems in real time for reliability, aging status, and presence of incipient faults requires distributed and centralized processing of large amounts of data from distributed sensor networks. To solve this task, cohesive multidisciplinary efforts are needed from such fields as sensing, signal processing, control, communications, optimization theory, and, more recently, robotics. This review paper focuses on one trend of power system monitoring, namely, mobile monitoring. The developments in robotic maintenance for power systems indicate significant potential of this technological approach. Authors discuss integration of several important relevant sensor technologies that are used to monitor power systems, including acoustic sensing, fringing electric field sensing, and infrared sensing.

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Section: B Evaluation Of the Electrical Insulation Statusmentioning

confidence: 99%

Robotic Monitoring of Power Systems

Jiang

Mamishev

2004

IEEE Trans. Power Delivery

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“…The described partial discharge detector is based on the fact that PD acoustic emission can be registered by means of piezoelectric sensors. Some publications [1,2] and patents [3] have analyzed the issue of acoustic partial discharge detection and localization through their acoustic emission and its propagation [4]. Signal processing tools are also used to identify different sources and type of discharges [5][6][7] and their location within the power transformer [8].…”

Section: Introductionmentioning

confidence: 99%

Acoustic measuring of partial discharge in power transformers

Ramírez-Niño¹,

Pascacio²

2009

Meas. Sci. Technol.

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Power transformers' reliability can be seriously affected by partial discharges. For this reason, it is necessary to implement technical methods to identify endangered equipment before catastrophic failures occur. A well-known method that can be applied either in the laboratory or in the field is the detection and localization of partial discharges, by means of the analysis of the acoustic signals they produced. An innovative partial discharge detector was developed based on the analysis of an acoustic or electrical PD signal envelope. This paper describes the architecture of the developed acoustic detector, which is composed of a set of ultrasonic sensors, signal conditioning and control modules, a graphical interface and the required software for the location of the affected area within the transformer. The conditioning and control modules perform analog to digital conversion, arrival time measurement, communication and control operations. Finally, some power transformer diagnostic testing is presented and discussed.

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