Effect of shed configuration on DC flashover performance of ice-covered 110 kV composite insulators

Composite insulators have been used in power system for more than 20 years in China. Compared to porcelain and glass insulators, the pollution flashover performance of composite insulators is better, whereas the icing flashover performance is worse. Shed configuration is a key factor that influences flashover voltage of composite insulators covered ice or snow in icing regions. The DC flashover tests of artificially ice-covered 110 kV composite insulators with different shed configuration were carried out in the multi-function artificial climate chamber. The test results revealed that there are huge differences between the icing flashover voltages of the composite insulators with different shed configuration. The test results indicate that icing flashover performance of the improved composite insulators for icing regions is not always superior to that of the standard composite insulators.

[1]  Shu Lichun.  Transmission lines' ice accidents and analysis of the formative factors , 2005 .

[2]  J. Hanssen,et al.  Long range transported pollutants and conductivity of atmospheric ice on insulators , 1993 .

[3]  Yan Wang,et al.  Study on icing of energized insulators with AC service and electrical performance , 2004, Conference Record of the 2004 IEEE International Symposium on Electrical Insulation.

[4]  Caixin Sun,et al.  Flashover Performance of Pre-contaminated and Ice-covered Composite Insulators to be Used in 1000 kV UHV AC Transmission Lines , 2007, IEEE Transactions on Dielectrics and Electrical Insulation.

[5]  M. Farzaneh,et al.  Selection of station insulators with respect to ice and snow-part I: technical context and environmental exposure , 2005, IEEE Transactions on Power Delivery.

[6]  Hu Yi,et al.  Analysis and Countermeasures Discussion for Large Area Icing Accident on Power Grid , 2008 .

[7]  Sun Cai-xin.  Numerical Simulation of Water Droplet Impingement on Composite Insulator Surface and Analysis of Shed Configuration , 2008 .

[8]  Zhou Wenjun.  Investigation of Ice-Covered Transmission Lines and Analysis on Transmission Line Failures Caused by Ice-Coating in China , 2008 .

[9]  M.A.R.M. Fernando,et al.  Performance of Silicone Rubber Composite Insulators in Sri Lanka , 2006, First International Conference on Industrial and Information Systems.

[10]  Qin Hu,et al.  Effects of shed configuration on AC flashover performance of ice-covered composite long-rod insulators , 2012, IEEE Transactions on Dielectrics and Electrical Insulation.

[11]  Masoud Farzaneh,et al.  An experimental study of flashover performance of various post insulators under icing conditions , 2000, 2000 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.00CH37132).

[12]  A. Bernstorf,et al.  Selection of station insulators with respect to ice and snow-part II: methods of selection and options for mitigation , 2005, IEEE Transactions on Power Delivery.

[13]  Xingliang Jiang,et al.  Equivalence of Influence of Pollution Simulating Methods on DC Flashover Stress of Ice-Covered Insulators , 2010, IEEE Transactions on Power Delivery.

[14]  Jianlin Hu,et al.  DC flashover performance and effect of sheds configuration on polluted and ice–covered composite insulators at low atmospheric pressure , 2011, IEEE Transactions on Dielectrics and Electrical Insulation.

[15]  Xingliang Jiang,et al.  Flashover performance of 10 kV DC composite insulator under icing and low atmospheric pressure conditions , 2003, Proceedings of the 7th International Conference on Properties and Applications of Dielectric Materials (Cat. No.03CH37417).

[16]  M. Farzaneh,et al.  A laboratory investigation of the flashover performance of outdoor insulators covered with ice , 1994, Proceedings of 1994 4th International Conference on Properties and Applications of Dielectric Materials (ICPADM).

[17]  K. Hokari,et al.  DC discharge performance at the tip of an icicle , 1989, Conference on Electrical Insulation and Dielectric Phenomena,.

[18]  Masoud Farzaneh,et al.  The Icing Stress Product : A Measure for Testing and Design of Outdoor Insulators in Freezing Conditions , 2000 .

[19]  Yan Wang,et al.  Study on AC Flashover Performance and Discharge Process of Polluted and Iced IEC Standard Suspension Insulator String , 2007, IEEE Transactions on Power Delivery.

[20]  M. Farzaneh,et al.  Insulators for Icing and Polluted Environments , 2009 .

[21]  Masoud Farzaneh,et al.  Flashover performance of IEEE standard insulators under ice conditions , 1996, Proceedings of 1996 Transmission and Distribution Conference and Exposition.