NDLI: Flashover voltage computation of porcelain insulators under positive polarity lightning impulse voltages

Content Provider	IET Digital Library
Author	Shanmugam, Gowrishankar Kalapati, Surendra Karakad, Sunitha
Abstract	The porcelain ceramic insulators have been used for outdoor insulation applications for a long time due to their impressive electrical and mechanical properties. The lightning impulse withstand voltage and flashover voltage characteristics of the insulators are important for insulation coordination of transmission lines and substations. This study presents a computer-based simulation methodology to determine the positive polarity lighting impulse flashover voltage of porcelain suspension and station post-insulators. The flashover voltage is determined by evaluating the streamer inception, propagation and sustenance criteria along the suitable paths based on finite-element-method-based electric field computation. The streamer propagation path is found through air along the dry arcing distance rather than along the creepage path of the insulator. The lightning impulse flashover voltage of suspension and post-insulators are computed based on simulation. The comparison of computed results with the experimental results gives a good agreement between them.
Starting Page	656
Ending Page	661
Page Count	6
ISSN	17518822
Volume Number	13
e-ISSN	17518830
Issue Number	Issue 5, Jul (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-smt/13/5
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-smt.2018.5605
Journal	IET Science, Measurement & Technology
Publisher Date	2019-02-18
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Computed Result Computer-based Simulation Methodology Connector Discharges (electric) Electric Field Finite Element Analysis Finite-element-method-based Electric Field Computation Flashover Impressive Electrical Property Insulation Coordination Insulator Lightning Impulse Flashover Voltage Long Time Mechanical Property Outdoor Insulation Application Porcelain Ceramic Insulator Porcelain Insulator Porcelain Suspension Positive Polarity Lighting Impulse Flashover Voltage Positive Polarity Lightning Impulse Voltage Power Line Supports Station Post-Insulator Statistics Streamer Propagation Path Substations Transmission Line Voltage Computation
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Electrical and Electronic Engineering

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