Partial discharge

About: Partial discharge is a research topic. Over the lifetime, 13997 publications have been published within this topic receiving 102058 citations. The topic is also known as: PD.

Location of partial discharge source on distribution line by measuring emitted pulse-train electromagnetic waves

Abstract: This paper presents a new system designed for detecting the pulse-train electromagnetic waves emitted from partial discharge. The authors utilize a VHF wideband antenna array as electromagnetic sensors and calculate the time delay between them in order to locate partial discharge in 3 dimensions. The standard cross correlation and smoothed coherence transform are used and compared to estimate the time delay. The time delay is then statistically calculated from a lot of pulses in one time of detection. The proposed system shows the effectiveness in the detection and location of partial discharge, and enhances the reliability of a method. A field experiment is performed to approach the concept of this method.

Electromagnetic Field Intensity Generated by Partial Discharge in High Voltage Insulating Materials

Abstract: Partial dischagre is the precursor of insulators breakdown. In this work the propagation of electromagnetic radiation emitted from partial discharge in high voltage insulating materials is investigated. Three common dielectric materials used in power industry: polymer, epoxy resin and ceramics are studied. The results obtained are envisaged to support the development of appropriate sensors for partial discharge detection. The radiation pattern is dependent on a multitude of parameters. Among these, the intensity distribution of the source as well as the dielectric material and its geometry are the main parameters. Signiflcant difierences in the radiation spectra are obtained for insulators made of ceramic material compare to non- ceramic insulators.

Propagation characteristics of UHF signals in transformers for locating partial discharge sources

Abstract: This paper looks at the propagation characteristics of UHF signals in transformers for locating partial discharge sources

Electroactive polymer transducers

Abstract: Dielectric elastomer or electroactive polymer film transducers configured to minimize high electrical field gradients that can lead to partial discharge and corona.

Device for detecting partial discharge in power equipment using radiated electromagnetic wave

Abstract: Disclosed is a device for detecting a partial discharge of power equipment. EM (electromagnetic wave) sensors detect EM signals from a partial discharge in a metal clad switchgear, a power cable, and a GIS. EM detectors amplify the signals from the sensors, and output only noise-removed IF signals. A pulse generator integrates the IF-processed EM to compare the integrated value with a previous value, and outputs a pulse according to a partial discharge. An EM level processor compares the IF-processed EM with reference voltages to output EM pulses of a plurality of levels. A waveform shaper shapes the pulses. A controller calculates the average number of pulses per 1 cycle by counting the partial discharge pulses for a predetermined time, receives the waveform-shaped pulses to calculate the partial discharge amount, and transmits the calculated amount, combined with the average number, to an external monitoring system.