Study on Bending and Twisting Mechanical Properties of High Voltage Porcelain Post Insulator

Abstract:

To study the mechanical properties of porcelain post insulators, the finite element model was established by ANSYS to calculate stress and strain distribution under bending or torsion moments. Mechanical tests based on resistance strain measurement technology were carried out on the actual porcelain post insulators to measure their strain distribution. The results show that sheds will cause strain concentration at the roots of porcelain column whether the post insulator is bearing bending or torsion load. The stress and strain of shed roots gradually increase from top to bottom along the post insulator when bearing bending moment, while they are relatively uniform under torsion moment. It should be taken full account of the stress concentration caused by sheds during the selection or maintenance of porcelain post insulators.

• Periodical: Applied Mechanics and Materials (Volume 521)
• Pages: 334-338
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.521.334
• Online since: February 2014
• Authors: En Wei Zhang*, Yun Bo Yang, Wei Song, Xiao Wei Wei, Zhi Bin Qiu, Jiang Jun Ruan, Dao Chun Huang
• Keywords: Bending Moment, Finite Element Method (FEM), Mechanical Property, Porcelain Post Insulator, Stress and Strain Distribution, Torque

References

[1] Zhicheng Guan, Yingyan Liu, Yuanxiang Zhou, etal. Insulator and external insulation of electric transmission and transformation equipment (Press of Tsinghua University, Beijing, 2006) (in Chinese).

[2] Zhongsen Yao, Guangya Wu, Hongming He, etal. High Voltage Engineering, Vol. 28 (2002), pp.57-58 (in Chinese).

[3] Jinping Han, Yu Cheng, Gangyi Xuan, etal. High Voltage Engineering, Vol. 31 (2005), pp.88-89 (in Chinese).

[4] Dong Yan, Ming Lu, Pen Shen. High Voltage Engineering, Vol. 32 (2006), pp.127-128 (in Chinese).

[5] Shun Yuan, Wenjun Cui. Design and renovation of high voltage switchgear (China Electric Power Press, Beijing, 2007) (in Chinese).

[6] Shenoi K, Gorur R S. IEEE Transactions on Dielectrics and Electrical Insulation, Vol. 15 (2008), pp.1731-1738.

[7] Volat C, Meghnefi F, Farzaneh M. IEEE Transactions on Dielectrics and Electrical Insulation, Vol. 17 (2010), pp.443-450.

DOI: 10.1109/tdei.2010.5448099

[8] Morocutti T, Berg T, Muhr M, etal. Developments of high voltage porcelain post-insulators. Conference Record of the 2012 IEEE International Symposium on Electrical Insulation (ISEI), San Juan, Puerto Rico, (2012).

DOI: 10.1109/elinsl.2012.6251497

[9] Song Zhou, Benrong Chen, Hongyan Zhang, etal. Sichuan Electric Power Technology, Vol. 29 (2006), pp.32-35 (in Chinese).

[10] Tao Sun, Hanning Xiao. Insulators and Surge Arresters, Vol. 2 (2007), pp.19-21 (in Chinese).

[11] Liming Wang, Chuang Wang, Tian Yuan, etal. High Voltage Engineering, Vol. 38 (2012), pp.655-662 (in Chinese).