Study On Tracking Performance For Pollution Insulators By Using Salt Fog Test

Muhammad Shaffiq Izwan, Abdul Aziz (2015) Study On Tracking Performance For Pollution Insulators By Using Salt Fog Test. Project Report. UTeM, Melaka, Malaysia. (Submitted)

Text (24 pages) Study On Tracking Performance For Pollution Insulators By Using Salt Fog Test 24 Pages.pdf - Submitted Version Download (323kB)

Abstract

The pollution flashover performance of insulators is generally tested by the steam fog method. However, environmental temperature in tests differs greatly, so the dispensability of test results is high. Moreover, the influence of fog-water conductivity has been taken into recorded. Compared with the steam fog method, the cold-fog method simulating natural fog is more consistent with the actual operating conditions of transmission line insulators. This deals with the influence of salt deposit density (SDD) and fog-water conductivity on pollution flashover performance. The contaminant level is consideration of the ratio water with salt. The influence of the two factors is determined by analyzing the results of laboratory experiments where polluted insulators were tested by using the salt cold-fog method. The results show that the 50% AC pollution flashover voltage (U50) decreases as SDD and fog-water conductivity increase. The correction coefficient indicating the influence of fog-water conductivity on U50 can be expressed as an exponential function. This is the technique for figuring out the condition of ageing occurs among the insulators on line or predicts their remaining life span has yet to be proposed. In addition, a study on diagnosis and monitoring of aged glass insulators is found lacking. At the end, leakage current flow has been recorded. The findings in this research suggest that under wet insulator surface condition of the transmission line glass insulator leakage current are good indicator of ageing. Furthermore this technique can be applied for online monitoring and diagnosing ageing transmission line glass insulator and it is very useful to the utility supplier.

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