Performance of 400 kV line Insulators under pollution | PDF | PPT

Download the full seminar report of Investigation of the performance of 400 kV line Insulators under pollution with editable DOC format and PDF. Also get the best PPT regarding the topic for electrical engineering.The report focuses on the effects of various pollutants on the performance of Insulators with test reports, methods, experiments, diagrams and results.
The original content is in PDF form titled "Experimental Investigation of the performance of 400 kV line Insulators under pollution" by Manoj Rai from IIT, Kanpur published in 2003. Kindly go through the document to study and perform the experiments your own. We have converted the pdf into a doc file and you are advised to follow the original document for graphs, tables, diagrams and other contents.

Abstract 

Outdoor insulators are subjected to nature Polluted environmental contaminants, which may include sea salt, cement dust, fly ash, birds droppings, industrial emissions etc. deposit on their surface With the increasing industrialization not only the degree of pollution but also the type of pollution has an effect on the performance of the insulators. In the present work. Experimental investigation of the Performance of 400 kV line ceramic insulators under Pollution is studied. Flashover under dense fog conditions on 400 kV Kanpur-Obra line has been investigated. For these investigations, four single ceramic insulator discs of the actual line were made available. Two out of which was used one and other two were unused (new). One each old and new was of 160 kN and other two was of 120kN mechanical strength ratings. Different failure modes of the Insulators were investigated. Pollutant Layer on the insulator was analyzed using X-ray Diffraction meter. It showed that the Pollutant dust layer on insulators contained a large percentage of NaCl, KOH, and Caso4.2h20. Flashover tests under different simulated atmospheric conditions were performed. Experimental results revealed that under Polluted and wet conditions, the flashover voltage falls below 10 kV whereas it was measured to be more than 60 kV under Polluted and dry conditions. Experimental results did not have a significant difference for old and new insulators. Capacitance’s of old and new insulators were measured with the help of Schering Bridge Surface gradient estimation on the three Phases of the line has been made. The voltage distribution across the insulator string has also been estimated. Remedies are suggested for reducing flashover on polluted lines. Literature study revealed non - ceramic insulators are more effective under polluted conditions. Particularly RTV Silicone coated ceramic insulators have been found very effective under polluted conditions.
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