Journal of South China University of Technology (Natural Science Edition) ›› 2014, Vol. 42 ›› Issue (8): 34-38,63.doi: 10.3969/j.issn.1000-565X.2014.08.006

• Power & Electrical Engineering • Previous Articles     Next Articles

Propagation Law of 10 kV XLPE Cable Breakdown Vibration in Sand

Liu Gang1 Jin Shang-er1 Huang Jia-sheng2   

  1. 1.School of Electric Power,South China University of Technology,Guangzhou 510640,Guangdong,China;2.Transmission Department,Guangzhou Power Supply Bureau Co.,Ltd.,Guangzhou 510310,Guangdong,China
  • Received:2014-03-19 Revised:2014-06-12 Online:2014-08-25 Published:2014-07-01
  • Contact: 刘刚(1969-)，男，博士，副教授，主要从事智能高压电网、过电压及其防护、电力设备外绝缘研究． E-mail:liugang@scut.edu.cn
  • About author:刘刚(1969-)，男，博士，副教授，主要从事智能高压电网、过电压及其防护、电力设备外绝缘研究．
  • Supported by:

    国家“973”计划项目( 2009CB724507) ; 广东电网公司科技项目( K-GD2011-023)

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Abstract:

This paper deals with the propagation attenuation behaviors of the breakdown vibration of the directburied 10 kV XLPE cable in sand by means of the model experiment.The experimental data are fitted respectivelyby using the exponential decay formula and the negative power attenuation formula,and the reasonableness of theformulas is verified.The results show that ( 1) both the exponential decay formula and the negative power attenuationformula can be used to describe the propagation attenuation behaviors of the cable breakdown vibration in sand,and their correlation coefficients are both more than 0.97; ( 2) the vibration wave attenuates quickly in the vicinityand slowly in the distance; and ( 3) the exponential decay coefficient and the power attenuation coefficient of sandare respectively 0.0704 and 1.3494.

Key words: cable breakdown vibration, attenuation behavior, model experiment, attenuation coefficient