Partial discharge detection device using ultrasonic sensor on medium voltage XLPE cable

Abstract

There are many methods that have been studied by earlier researchers in order to detect the acoustic properties of Partial Discharge (PD) emitted by PD sources. One of the methods known as ultrasonic sensing on medium voltage Cross-Linked Polyethylene (XLPE) cable was adopted to detect partial discharges on commercial applications, usually by using Acoustic Emission (AE) sensors. This paper presents the processes of designing a PD sensor to detect the acoustic properties of the partial discharges on medium voltage XLPE cable. This PD sensor method works by detecting the partial discharges occurred at the joint of the cable which can act as an early warning device to help minimize the repair and maintenance costs of degrading cable. Result of the experiment shows the complete design of the prototype device, the device after fabrication and the functionality of the device. This design of the prototype can be beneficial for future uses in designing cost efficient and smaller sized PD detection devices. By positioning the sensor in horizontal position directly to the source of PD on the cable, the sensor will be able to detect acoustic properties of PD, by picking up the frequencies beyond 40 kHz. By varying the voltage applied values, a design of experiment (DOE) is carried out accordingly. Result of the experiment shows that the prototype device is functioning as expected, and hence this finding will be very useful to the consumers of power industries as the sensor device can serve as an alternative device to the commercialized PD sensing devices which are bulky and expensive.

Modeling of high frequency high voltage of waveforms on life of enamel insulation

“…The life of two kinds of enamel wires of organic resin and nanofilled resin were studied and modeling of a lifetime was predicted [14]. I F Radzi et al [15] argued that there is an improvement of degradation at long term by PD in a drastic way when the applied voltage is 6.5 kV to 8.5 kV. Breakdown studies with a step of 50V/s for AC and a step of 100 V/s for DC on thin-film insulation with a thickness of 100 μm were done [16].…”

A t-shaped partial ground microstrip patch antenna based UHF sensor for partial discharge detection

“…Partial discharge (PD) occurrences in high voltage equipments is one of major concerns in power utility industry, as it may lead to inconvenient power outage and involves cost intensive repairs. PD is an electrical discharge that do not completely or partially bridge the insulation between conductors and which can or cannot occur adjacent to a conductor [1]. The physical symptom appears such as visible burn marks at the solid insulation.…”

Partial discharges location in power transformers using piezoceramic sensors

“…More specifically, in the analysis of PDs, they are used extensively in the detection and localization of PDs in high voltage equipment such as rotating machinery and transformers [14,[20][21][22][23][24]. In fact, Piezoceramic films performing at high frequency (High Temperature Ultrasonic Transducers-HTUTs) have been developed by Industrial Materials Institute, National Research Council of Canada [25,26].…”