Analysis for the Defect of Chromatogram in 35kv Oil-immersed Electric Reactor

¹ Maintenance of northern Hebei Province Electric Power Co. Ltd, Substation maintenance center, Beijing, China

² Maintenance of northern Hebei Province Electric Power Co. Ltd, Substation maintenance center, Beijing, China

³ Maintenance of northern Hebei Province Electric Power Co. Ltd, Substation maintenance center, Beijing, China

⁴ Maintenance of northern Hebei Province Electric Power Co. Ltd, Substation maintenance center, Beijing, China

⁵ Maintenance of northern Hebei Province Electric Power Co. Ltd, Substation maintenance center, Beijing, China

Abstract

A defect of chromatogram in a 35kV oil-immersed three-phase one-piece electric reactor in a 500kV substation 。 The initial analysis suggests that the defect is caused by the loose connection of the iron core magnet shield (magnet shield layer of iron core or earthling top). Examination of winding DC resistance, DGA and other relevant examinations were carried out to investigate the defect reasons., which is demonstrated by the dismantlement. In-depth study is taken and corresponding prevention measures are put forward in the paper.

KeywordsOil-immersed Electric ReactorChromatogram DefectMagnet Shield LayerPartial Discharge

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Analysis for the Defect of Chromatogram in 35kv Oil-immersed Electric Reactor

Abstract

References (9)