TY - JOUR
T1 - Electrostatic and electrodynamic field analyses of 33kV line insulators
AU - Metwally, Ibrahim A.
AU - Salam, Md Abdus
AU - Al-Maqrashi, Ali
AU - Sumry, Saif A.R.
AU - Al-Harthy, Saif S.H.
PY - 2006
Y1 - 2006
N2 - Electrostatic and electrodynamic field analyses of 33kV line insulators were introduced to compare the electric-field and the current density profiles of commonly used line insulators in Oman; namely, silicone rubber (SiR) and porcelain line post insulators, and porcelain cap and pin insulator string. SLIM software package was used for such simulation, which is a fully integrated collection of software modules that provides facilities for the generation and solution of electro-magnetic finite element models. The simulation results reveal that for the electrostatic simulation under pollution conditions, SiR and porcelain line-post insulators give maximum values of the electric field of 360kV/m and 1700kWm, respectively. The latter value exceeds the recommended electric field level of 500kV/m. For the electrodynamic simulation under pollution conditions, the electric field and the current density are much higher for porcelain insulator compared to those of SiR insulator. The simulation of four cap-pin standard insulator string reveals that there is high electric field (1250kV/m) at the cap-insulator gap which can cause high current density for polluted case. Finally, the trend of the simulation results has been verified by experimental tests, which has been conducted on different 33kV line insulators having different designs and materials.
AB - Electrostatic and electrodynamic field analyses of 33kV line insulators were introduced to compare the electric-field and the current density profiles of commonly used line insulators in Oman; namely, silicone rubber (SiR) and porcelain line post insulators, and porcelain cap and pin insulator string. SLIM software package was used for such simulation, which is a fully integrated collection of software modules that provides facilities for the generation and solution of electro-magnetic finite element models. The simulation results reveal that for the electrostatic simulation under pollution conditions, SiR and porcelain line-post insulators give maximum values of the electric field of 360kV/m and 1700kWm, respectively. The latter value exceeds the recommended electric field level of 500kV/m. For the electrodynamic simulation under pollution conditions, the electric field and the current density are much higher for porcelain insulator compared to those of SiR insulator. The simulation of four cap-pin standard insulator string reveals that there is high electric field (1250kV/m) at the cap-insulator gap which can cause high current density for polluted case. Finally, the trend of the simulation results has been verified by experimental tests, which has been conducted on different 33kV line insulators having different designs and materials.
KW - AC flashover voltage
KW - Current density
KW - Electric field
KW - Electrodynamic modeling
KW - Electrostatic modeling
KW - Leakage current
KW - Line insulators
KW - Pollution
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U2 - 10.2202/1553-779X.1330
DO - 10.2202/1553-779X.1330
M3 - Article
AN - SCOPUS:33749415026
SN - 1553-779X
VL - 7
SP - 1
EP - 24
JO - International Journal of Emerging Electric Power Systems
JF - International Journal of Emerging Electric Power Systems
IS - 3
ER -