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Content Provider | IET Digital Library |
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Author | Abimouloud, Adel Arif, Salem Korichi, Dris Emran, Sayyed Mahdi Ale |
Abstract | The aim of this work is to estimate the flashover voltage of cap-and-pin insulator using a novel improvement of the pollution resistance evaluation. In cap-and-pin suspension insulators, local arcing starts around the pin where the dry bands first appear due to the evaporation of the conductive layer. In appropriate conditions, a unique dominant arc starting from the pin propagates toward the cap resulting in a complete flashover. Since the highest current density is concentrated around the arc root during propagation, the pollution layer residual resistance variation, with respect to the arc position, is non-linear. Thus an original three-dimensional model, which depicts a real insulator using COMSOL MultiphysicsTM to evaluate the residual resistance, is developed. This model takes into consideration the actual geometry of the insulator and the current restriction at the arc root for a specific arc radius. A novel mathematical model for calculating the residual resistance of this polluted insulator was elaborated for all possible arc radii. The mathematical model and the 3D simulation results are in satisfactory agreement. To evaluate the flashover voltage, a new approach based on Saddle Point Finding Method is proposed. The new approach and model have been validated using experimental results of previous studies. |
Starting Page | 279 |
Ending Page | 286 |
Page Count | 8 |
ISSN | 17518822 |
Volume Number | 13 |
e-ISSN | 17518830 |
Issue Number | Issue 2, Mar (2019) |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-smt/13/2 |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-smt.2018.5105 |
Journal | IET Science, Measurement & Technology |
Publisher Date | 2018-11-06 |
Access Restriction | Open |
Rights Holder | © The Institution of Engineering and Technology |
Subject Keyword | Appropriate Condition Arc Position Arc Radius Arc Root Arcs (electric) Cap-and-pin Polluted Insulator Cap-and-pin Suspension Insulators Complete Flashover COMSOL Multiphysics Conductive Layer Connector Current Density DC Flashover Voltage Prediction Dry Band Flashover Flashover Voltage Highest Current Density Insulator Insulator Contamination Local Arcing Mathematical Model Pollution Layer Residual Resistance Variation Pollution Resistance Evaluation Possible Arc Radii Power Line Supports Saddle Point Finding Method Specific Arc Radius Surface Chemistry Three-dimensional Model Unique Dominant Arc |
Content Type | Text |
Resource Type | Article |
Subject | Atomic and Molecular Physics, and Optics Electrical and Electronic Engineering |
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