References
[1] Boheme H, Obenaus F. Pollution flashover tests on insulators in the laboratory and in systems and the model concept of creepage path flashover. Cigre 1966: paper 407.
[2] Abdel-Salam HAH, Nagat MKA, Bahaa AA. Effect of desert environmental conditions on the flashover voltage of insulators. Energy Conversion and Management 2002; 43: 2437–2442.
[3] Ward SW, Sanwar MR. A study of pollution effect on flashover phenomenon for south-west Iraqi (132kV) grid insulators. Al-Qadisiyia Journal for Engineering Sciences 2010; 3 (1): a1-a18.
[4] Chandrashekhar AB, Pradipkumar D. Analytical model to predict pollution flashover voltages of porcealin disc insulators. Acta Electrotechnica et Informatica 2015; 15 (1): 42–49.
[5] Challagondla NK. Behaviour of water drop on the insulator surface and study of electric field distribution on parallel insulators under DC. PhD Thesis. Brandenburg University of Technology: 2015.
Tikrit Journal of Engineering Sciences (2018) 25(1) 69- 73
Effect of the Combined Pollution of Brick Industry and Sandstorms on the Performance of High Voltage Insulators and Flashover Phenomenon
Israa Amer Dahham | |
College of Engineering, University of Al-Qadisiyah, Iraq |
Abstract
Recent repeated flashovers and power outage incidents in an (400/132) kV substation, located in the Ad Diwaniyah Province, have called for extensive investigations to evaluate the effect of subsequent deposition of sandstorm and free carbon particles (soot) on the performance of HV insulators and probable flashover occurrences. In the Ad Diwaniyah Province, the insulators of the transmission lines and substations are normally subjected to sandstorms (once or twice per year). Moreover, rapid brick industry expansion (10 brick factories constructed and operated over the last ten years) within the area of the Shafeyea, where, the (400/132) kV substation is located, has also led to a noticeable industrial pollution. Porcelain and polymeric insulators were exposed to sand and soot polluted environments and the effect of pollution severity on the flashover characteristics was investigated. Flashover voltages were measured under various simulated polluted environments for both porcelain and polymeric insulators. Obtained results show that the deposition rate of soot particles is highly increased when both porcelain and polymeric insulators are already polluted with sand particles regardless of whether the sand particles are charged or not. However, moistening was found very critical to pollutant layer build-up and consequently increases the severity of pollution.
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Keywords: Flashover, HV insulators, leakage current, pollution