TY - JOUR

T1 - Improved flashover mathematical model of polluted insulators

T2 - A dynamic analysis of the electric arc parameters

AU - Faramarzi Palangar, Mousalreza

AU - Mirzaie, Mohammad

AU - Mahmoudi, Amin

PY - 2020/2

Y1 - 2020/2

N2 - This paper presents an improved dynamic mathematical model of critical parameters for ceramic insulators based on an extended equivalent electric circuit model of a polluted insulator. The extended equivalent electric circuit model introduces a capacitance in dry band. The model proposes that the electric arc constants (n, N) of critical parameters (voltage and current) in the mathematical model are not static. These factors depend on insulator's profile, pollution intensity and thermal characteristic of insulator discharge. The dynamic values of electric arc parameters are suggested based on the analysis of the experimental data and mathematical calculation of critical voltage of the polluted insulators. The calculated critical voltage of the proposed mathematical model is compared against the experimentally measured values of the critical voltage under different operating conditions. The experimental test results validate the competency of the proposed dynamic model in an accurate performance prediction of the polluted insulators.

AB - This paper presents an improved dynamic mathematical model of critical parameters for ceramic insulators based on an extended equivalent electric circuit model of a polluted insulator. The extended equivalent electric circuit model introduces a capacitance in dry band. The model proposes that the electric arc constants (n, N) of critical parameters (voltage and current) in the mathematical model are not static. These factors depend on insulator's profile, pollution intensity and thermal characteristic of insulator discharge. The dynamic values of electric arc parameters are suggested based on the analysis of the experimental data and mathematical calculation of critical voltage of the polluted insulators. The calculated critical voltage of the proposed mathematical model is compared against the experimentally measured values of the critical voltage under different operating conditions. The experimental test results validate the competency of the proposed dynamic model in an accurate performance prediction of the polluted insulators.

KW - Arc constants

KW - Critical voltage

KW - Dynamic mathematical model

KW - Equivalent electric circuit

KW - Flashover

KW - Leakage current

KW - Polluted insulators

UR - http://www.scopus.com/inward/record.url?scp=85074683817&partnerID=8YFLogxK

U2 - 10.1016/j.epsr.2019.106083

DO - 10.1016/j.epsr.2019.106083

M3 - Article

AN - SCOPUS:85074683817

VL - 179

JO - Electric Power Systems Research

JF - Electric Power Systems Research

SN - 0378-7796

M1 - 106083

ER -