The Ground Effect and the Mirror Effect in small air gaps

Maglaras, L; Maglaras, A; Drigojias, I; Maglara, S

dc.contributor.author	Maglaras, L	en
dc.contributor.author	Maglaras, A	en
dc.contributor.author	Drigojias, I	en
dc.contributor.author	Maglara, S	en
dc.date.accessioned	2014-03-01T01:55:29Z
dc.date.available	2014-03-01T01:55:29Z
dc.date.issued	2006	en
dc.identifier.issn	11092777	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/27757
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-33749027759&partnerID=40&md5=2e81d586c59b5cac43b82bb7c47c8cdf	en
dc.subject	Air Gaps	en
dc.subject	Corona Current	en
dc.subject	FEM	en
dc.subject	Field Strength	en
dc.subject	Ground Effect	en
dc.subject	Mirror Effect	en
dc.subject.other	Boundary conditions	en
dc.subject.other	Electric breakdown	en
dc.subject.other	Electric corona	en
dc.subject.other	Electric current distribution	en
dc.subject.other	Electric field effects	en
dc.subject.other	Electric grounding	en
dc.subject.other	Electric space charge	en
dc.subject.other	Electrodes	en
dc.subject.other	Finite element method	en
dc.subject.other	Air gaps	en
dc.subject.other	Corona current	en
dc.subject.other	Mirror effect	en
dc.subject.other	Electric insulating materials	en
dc.title	The Ground Effect and the Mirror Effect in small air gaps	en
heal.type	journalArticle	en
heal.publicationDate	2006	en
heal.abstract	In the present paper we investigate the Ground Effect of small rod-rod air gaps, in connection to the Mirror Effect of rod-plate air gaps. The Ground Effect is a phenomenon, which is observed due to the fact that in air gap arrangements one of the two electrodes is usually at earth potential (grounded). The Mirror Effect is valid in rod-plate air gaps when the plate's diameter is very big. The field distribution along the axis of the gaps is analyzed with the Finite Element Method. The maximum values of the field strength in the gap are recorded for the two different arrangements the one with one electrode grounded, and the other with symmetrical charging of the electrodes. The distribution of the field along the axis of the gap is strongly affected by the gap length, the geometry of the arrangement, and the electrode, chosen to be at earth potential (grounded). The Mirror Effect establishes equivalence between the rod-plate and rod-rod arrangements. It is resulted that the Ground Effect and the Mirror Effect influence the corona onset and the breakdown voltage of the air gaps analogically. It is intense in small air gaps, while the influence of the corona current appears in longer air gaps and overlaps the Ground Effect. The principle of action-reaction is valid.	en
heal.journalName	WSEAS Transactions on Systems	en
dc.identifier.volume	5	en
dc.identifier.issue	11	en
dc.identifier.spage	2522	en
dc.identifier.epage	2529	en