DocumentCode :
591638
Title :
AC flashover performance for line post and pin post insulators in distribution 22 kV
Author :
Thipprasert, W. ; Sritakeaw, P. ; Jirapong, Peerapol
Author_Institution :
Dept. of Electr. Eng., Rajamangala Univ. of Technol. Lanna Chiang Rai, Chiang Rai, Thailand
fYear :
2012
fDate :
9-12 Oct. 2012
Firstpage :
464
Lastpage :
468
Abstract :
Electrical insulators in 22kV distribution system of the Provincial Electricity Authority (PEA) are mostly porcelain insulator types that consists of suspension, pin type, line post, and pin post insulators. The distribution lines will be polluted by industrial contaminants, salt fog or natural dust. Experience shows that pollution flashover is one of the main natural calamities harming and affecting the voltage stability and reliability of distribution system. This paper compares the test results obtained from artificial pollution tests according to IEC 60507 with line post type and pin post type insulators of medium system under same test conditions. The salt fog test results indicate that the pollution flashover performance of line post insulator is less than to 50 percent of wet power frequency withstand voltage at equivalent salt deposit density (ESDD) = 0.5 mg/cm2 and the leakage current (LC) of line post insulator increased to 10.2 mA at ESDD = 0.5 mg/cm2 at nominal voltage. In the experiment indicate that AC pollution flashover performance of pin post insulator has better than line post insulator in the serious pollution area.
Keywords :
IEC standards; flashover; leakage currents; porcelain insulators; power distribution reliability; stability; AC pollution flashover performance; IEC 60507; artificial pollution tests; distribution lines; distribution system reliability; electrical insulators; equivalent salt deposit density; industrial contaminants; leakage current; line post insulators; natural calamities; natural dust; pin post insulators; pin type insulators; porcelain insulator; provincial electricity authority; salt fog; suspension insulators; voltage 22 kV; voltage stability; Flashover; Power transformer insulation; Reliability; Thermal pollution;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Vehicle Power and Propulsion Conference (VPPC), 2012 IEEE
Conference_Location :
Seoul
Print_ISBN :
978-1-4673-0953-0
Type :
conf
DOI :
10.1109/VPPC.2012.6422794
Filename :
6422794
Link To Document :
بازگشت