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      Study of electric field stress on the surface contour and at the triple junction in three phase GIS with FGM spacer under the depression defect

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          Abstract

          Now days, the establishment of spacers is in wide usage in three-phase Gas Insulated Busduct (GIB) for providing mechanical support and better insulation to the conductors. The region of the intersection of SF6 gas, enclosure end and the spacer is one of the weakest links in GIB, so the major concentration is done on minimization of electric field stress at this junction by using Functionally Graded Material (FGM) technique. The other incidents of insulation failures are due to several defects like depression, delamination etc. reduces the dielectric strength of the spacers. In this paper, an FGM post type spacer has been designed for a three-phase GIB under depression and further electric field stress at Triple Junction (TJ) is reduced by introducing a metal insert (MI) nearer to the TJ. Several filler materials are used as doping materials for obtaining different permittivity values using FGM technique to achieve uniform electric field stress. Simulation is carried out for the designed spacer at various operating voltages with different types of FGM gradings. The effect of depression with different dimensions and positions is analyzed before and after inserting MI to the FGM post type spacer in three-phase GIB.

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          Electromagnetic waves from partial discharges and their detection using patch antenna

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            Insulation performance of three types of micro-defects in inner epoxy insulators

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              Application of functionally graded material for reducing electric field on electrode and spacer interface

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                Author and article information

                Journal
                International Journal of Emerging Electric Power Systems
                Walter de Gruyter GmbH
                1553-779X
                2194-5756
                September 11 2020
                September 11 2020
                : 0
                : 0
                Affiliations
                [1 ]Department of EEE, Lendi Institute of Engineering and Technology, Vizianagaram, India
                [2 ]Department of EEE, JNTUA College of Engineering Pulivendula, Andhra Pradesh, India
                [3 ]Department of EEE, Dr L. Bullayya College of Engineering for Women, Visakhapatnam, India
                [4 ]Department of EEE, GITAM University, Visakhapatnam, India
                Article
                10.1515/ijeeps-2020-0080
                bc4a505d-ad63-4be5-94f8-493d9e36aa0a
                © 2020

                http://creativecommons.org/licenses/by/4.0

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