Partial discharges at different voltage waveshapes: Comparison between two different acquisition systems
Artikel i vetenskaplig tidskrift, 2018

In modern HV apparatuses the wide use of electronic converters, increase the stress on the involved insulation systems and thus affect the reliability of the whole power grid. Additionally, such non-sinusoidal voltage shapes contain high gradient flanks that create problems in the detection of partial discharge (PD) activity. The aim of this paper is to discuss the methodology on how to suitably approach PD detection in insulation systems exposed to various voltage waveshapes in general by comparing two different measuring systems. The first one, equipped with a resonant PD decoupler, designed specifically for detection at typical power electronic waveshapes and the other one, based on an antenna sensor with flat frequency response, a general-purpose AC system. It was found that not so much the acquisition principles as the features are important for effective detection of PD signals appearing at rapidly changing test voltages from power electronic devices.

Square voltage waveforms

Measurements

Partial discharges

Författare

P. Romano

Universita degli Studi di Palermo

Thomas Hammarström

Elnät och komponenter

Tord Bengtsson

ABB Corporate Research Center

A. Imburgia

Universita degli Studi di Palermo

A. Madonia

Universita degli Studi di Palermo

F. Viola

Universita degli Studi di Palermo

Stanislaw Gubanski

Elnät och komponenter

IEEE Transactions on Dielectrics and Electrical Insulation

1070-9878 (ISSN)

Vol. 25 584-593

Ämneskategorier

Medicinsk laboratorie- och mätteknik

Signalbehandling

Annan elektroteknik och elektronik

DOI

10.1109/TDEL.2018.006782