Influence of ground and corona currents on dielectric behavior of small air gaps

Maglaras, A; Topalis, F

dc.contributor.author	Maglaras, A	en
dc.contributor.author	Topalis, F	en
dc.date.accessioned	2014-03-01T01:30:55Z
dc.date.available	2014-03-01T01:30:55Z
dc.date.issued	2009	en
dc.identifier.issn	1070-9878	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19677
dc.subject	Air gap	en
dc.subject	Breakdown	en
dc.subject	Corona	en
dc.subject	Field strength	en
dc.subject	Grounding effect	en
dc.subject	Polarity effect	en
dc.subject.classification	Engineering, Electrical & Electronic	en
dc.subject.classification	Physics, Applied	en
dc.subject.other	Electric breakdown	en
dc.subject.other	Electric conductivity	en
dc.subject.other	Electric fields	en
dc.subject.other	Electrodes	en
dc.subject.other	Ionization of gases	en
dc.subject.other	Temperature control	en
dc.subject.other	Air gap	en
dc.subject.other	Breakdown	en
dc.subject.other	Corona	en
dc.subject.other	Field strength	en
dc.subject.other	Grounding effect	en
dc.subject.other	Polarity effect	en
dc.subject.other	Electric corona	en
dc.title	Influence of ground and corona currents on dielectric behavior of small air gaps	en
heal.type	journalArticle	en
heal.identifier.primary	10.1109/TDEI.2009.4784549	en
heal.identifier.secondary	http://dx.doi.org/10.1109/TDEI.2009.4784549	en
heal.identifier.secondary	4784549	en
heal.language	English	en
heal.publicationDate	2009	en
heal.abstract	This paper investigates the influence of grounding on the field distribution and on the dielectric behavior of small rod-plate and rod-rod air gaps. This effect can be attributed to the grounding of one electrode. In the different arrangements with one electrode grounded or with the electrodes symmetrically charged the experimental results of the corona and breakdown are recorded and compared to the simulation results of the field distribution. It is resulted that the grounding influences significantly the electric field distribution, the dc corona and the dc breakdown. The field is less inhomogeneous in grounded rod - plate air gaps and in rod-rod air gaps with symmetrically charged electrodes, and consequently the values of the corona onset and the breakdown voltage are higher. In longer air gaps the corona current influences the field distribution and consequently the dc breakdown. The effect of grounding on the breakdown is weakened when the dc polarity of the voltage is negative, otherwise it is enhanced. In air gaps with lengths > 3 cm (negative dc polarity) or >8 cm (positive dc polarity) it is overlapped by the effect of the corona current. Relations between the field strength, the corona current, the corona onset and the breakdown voltage arise. The principle of action-reaction is valid. © 2006 IEEE.	en
heal.publisher	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC	en
heal.journalName	IEEE Transactions on Dielectrics and Electrical Insulation	en
dc.identifier.doi	10.1109/TDEI.2009.4784549	en
dc.identifier.isi	ISI:000263225200005	en
dc.identifier.volume	16	en
dc.identifier.issue	1	en
dc.identifier.spage	32	en
dc.identifier.epage	41	en