Effect of UV Radiation on Different Voltage Grade of HTV-Silicon Rubber in Dry Conditions Performance

Abstract:

Along with our country " west-east electricity transmission " project and UHV projects, HTV-silicon rubber with superior properities has been more and more widely used in the western regions of China.The paper focus on hami to zhengzhou ±800kV UHV DC transmission project which in hami HTV-silicon rubber insulators aging problems, extract dry and the strong UV radiation climatic characteristics of the hami area to quantify, in the dry environment we conduct UHV levels of HTV-silicon rubber materials and normal voltage levels of HTV-silicon rubber materials on UV accelerated aging experiment.And the tests of hardness,static contact angle and Fourior transform infrared spectroscopy ( FTIR) are performed for the samples. The experimental results show that both samples hardness are larger, the flexibility are reduced; their both surface static contact angle are decreased, the hydrophobic are part of the loss; their both surface roughness are bigger,and a part of filler is leaked; FTIR of peak area of Si-CH3 and Si-O-Si keys absorption peak are reduced, shows a portion of the Si-CH3 and Si-O-Si keys is interrupted into free radicals; under the condition of the initial data of the two kinds of samples are similar , the variation of UHV levels of each data sample is lower than it of normal levels of samples. This is due to the UHV grade of HTV-silicon rubber materials on the formulation and manufacturing process are optimized, in the dry environment the UV aging resistance of UHV levels of HTV-silicon rubber materials is superior to it of ordinary voltage grade of HTV-silicon rubber materials.

• Periodical: Applied Mechanics and Materials (Volumes 385-386)
• Pages: 11-15
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.385-386.11
• Online since: August 2013
• Authors: Yun Peng Liu, Qian Shi, Ying Liang
• Keywords: Aging, Dry, Formula Optimization, FT-IR, HTV-Silicon Rubber, UV Radiation

References

[1] QIU Zhi-xian. High Voltage composite insulator and its application [M]. Beijing, China: China Electric Power Press, (2006).

[2] FU Guan-jun, Wang Li-ming, Hou Lei, et al. Feasibility of application of composite insulators in ±800kV UHV DC tension strings[J]. Proceedings of the CSEE, 2011, 31(22): 119-125.

[3] J P R eyndery, I P Jandrell, et a1. Review of aging and recovery of silicone rubber Insulation for outdoor use[J]. IEEE Trans Dielectric and Electrical Insulation, 1999, 6(5): 620-631.

DOI: 10.1109/94.798119

[4] XU Qi-ying. Experimental study on aging resistance of silicone rubber composite insulators[J]. Insulating Materials, 2009, 42(3): 49-51.

[5] ZHOU Zhi-min. Development and application of silicone rubber composite insulators[J]. Popular Utilization of Electricity, 2004, 20( 6): 20- 22.

[6] LI Jing-xiong. Discussion of composite insulators[J]. Sichuan Electric Power Technology, 2003, 27( 4): 45- 46.

[7] ZHAO Lin-jie, LI Cheng-rong, XIONG Jun. et al. Evaluation of the hydrophobicity of composite insulators based on on-line detection [J]. Proceedings of the CSEE, 2008, 28(16): 135-142.

[8] Andrady A L, Hamid H, Torikai A. Effects of solar UV and climate change on materials[J]. Photochem. Photobiol. Sci, 2011, 10: 292-300.

DOI: 10.1039/c0pp90038a

[9] R S Gorur, R S Thallam. Effect of ultraviolet radiation and high tenperature on polymer insulating materials[C]. International Symposium on High Voltage Engineer-ing Dresden 1991, p.24.

[10] DL/T 810-2002 Technical specification for ±500 kV DC long rod composite insulators[S], (2002).

[11] HUANG Li. Polymer matierials [M]. Beijing, China. Chemical Industry Press, (2005).

[12] ZHAO He-xuan, ZHAO Shu-rong, WANG Lian-zhang, et al. Influence of UV irradiation on degradation of silicone rubber composite insulators in high-altitude regions[J]. North China Electric Power, 2009, 39(3): 10-13.

[13] HUANG Zi-rong, ZHANG De-jin. 1000kV/±800kV UHV composite insulator development [J], Grid Technology, (2006).

[14] LIU Yun-peng, WANG Qiu-sha, LU Fang-cheng, et al. Influence of UV radiation on HTV silicon rubber performance[J]. High Voltage Engineering, 2010, 36(11): 2634-2638.