Continuous monitoring of dielectric properties of LDPE samples during electrical treeing
Paper i proceeding, 2010

A technique capable of utilizing voltage waveforms containing harmonics for measurements of dielectric response over a range of frequencies is presented. It has proved useful in several applications and offers high accuracy and flexibility. This paper presents measurement of the changes imposed by electrical treeing in the dielectric properties of LDPE samples and shows that the capacitance increase monitored during the tree growth corresponds well with the optically measured tree length. There is also a change of dielectric loss associated with partial discharge activity during the tree growth, which could be correlated to different treeing modes. The method provides an attractive alternative to the traditional measurements of tree growth by means of optical observations, as it allows for investigations of nontransparent materials. ©2010 IEEE.

Partial discharges

Dielectric response measurements

Tree length measurements

Electrical treeing

Författare

Björn Sonerud

Chalmers, Material- och tillverkningsteknik, Högspänningsteknik

Jörgen Blennow

Chalmers, Material- och tillverkningsteknik, Högspänningsteknik

Stanislaw Gubanski

Chalmers, Material- och tillverkningsteknik, Högspänningsteknik

Susanne Nilsson

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

Tord Bengtsson

ABB Corporate Research Center

2010 IEEE International Conference on Solid Dielectrics, 4th - 9th July 2010, Potsdam,Germany

683-686

Ämneskategorier

Annan elektroteknik och elektronik

DOI

10.1109/ICSD.2010.5568224

ISBN

978-1-4244-7942-9