Application of UHF method for partial discharge source location in power transformers

2018 ◽  
Vol 25 (6) ◽  
pp. 2266-2278 ◽  
Author(s):  
Djordje Dukanac
Keyword(s):  
Partial Discharge ◽  
Source Location ◽  
Power Transformers ◽  
Discharge Source

Otkrivanje i analiza signala parcijalnih pražnjenja u energetskom transformatoru UHF metodom

2020 ◽  
Vol 22 (1-2) ◽  
pp. 96-101
Author(s):  
Đorđe Dukanac ◽  
Keyword(s):  
Detailed Analysis ◽  
Background Noise ◽  
Power Transformer ◽  
Partial Discharge ◽  
Spectral Composition ◽  
Partial Discharges ◽  
Power Transformers ◽  
Discharge Source ◽  
Useful Components

This paper presents the practical detection of partial discharge signals using a UHF sensor mounted on a power transformer and then the detailed analysis of a signal is done. The first part of the paper describes possible partial discharge sources in power transformers, UHF method and UHF sensor. In the second part of the paper, received signal at UHF sensor is considered. In order to accurately determine the magnitude of the partial discharge signal, especially if the location of the partial discharge source is far from the location of the UHF sensor, it is necessary to separate the signal from the background noise. This is only possible at intervals between individual bursts of the observed partial discharges. The spectral composition of the received signal is considered and a method for separating the present noise from the useful components of the partial discharge signal is established. The presumable main cause of partial discharges is evaluated.

A simple approach of partial discharge source location in high voltage cables

2017 ◽  
Vol 40 (12) ◽  
pp. 3507-3514
Author(s):  
Jose Ramírez-Niño ◽  
Carlos G Azcarraga ◽  
Alberth Pascacio ◽  
Rito Mijarez ◽  
Joaquin Rodríguez-Rodríguez
Keyword(s):  
Sensor Array ◽  
Partial Discharge ◽  
Source Location ◽  
Simple Approach ◽  
Propagation Direction ◽  
Partial Discharges ◽  
Power Cables ◽  
New Approach ◽  
Discharge Source ◽  
Incipient Faults

This article presents a new approach of partial discharges (PD) source location in power cables. The main advantage of this approach is the detection of the propagation direction of the PD. The method provides a pattern named by the authors PD+D, which, in contrast to the well–known phase-resolved partial discharge (PRPD) pattern, graphically shows the direction of PD propagation and uses the polarity of a sensor array on top of the magnitudes of the positive and negative parts of each PD pulse to detect the direction of propagation, is described in detail. The proposed technique is useful for the evaluation and diagnosis of power cables, since it can identify incipient faults. The attained results that demonstrate the value of this methodology and their scope and limitations are discussed.

A New Application of Rogowski Coil Sensor for Partial Discharge Localization in Power Transformers

2021 ◽  
pp. 1-1
Author(s):  
Sajjad Sharifinia ◽  
Mehdi Allahbakhshi ◽  
Teymoor Ghanbari ◽  
Asghar Akbari ◽  
Hassan Reza Mirzaei
Keyword(s):  
Partial Discharge ◽  
Rogowski Coil ◽  
Power Transformers
Sign in / Sign up

Export Citation Format

Share Document