10kV XLPE电缆击穿振动在砂土中的传播规律  

Propagation Law of 10 kV XLPE Cable Breakdown Vibration in Sand

作　　者：刘刚[1] 金尚儿 黄嘉盛 

机构地区：[1]华南理工大学电力学院,广东广州510640 [2]广州供电局有限公司输电所,广东广州510310

出　　处：《华南理工大学学报（自然科学版）》2014年第8期34-38,63,共6页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家"973"计划项目(2009CB724507);广东电网公司科技项目(K-GD2011-023)

摘　　要：通过模型试验研究了直埋式10 k V XLPE电缆击穿振动在砂土中的传播衰减特性,分别用指数衰减、负乘幂衰减公式对试验数据进行拟合,并验证公式的合理性.结果表明:指数衰减、负乘幂衰减公式均可用于描述电缆击穿振动在砂土中的传播衰减特性,相关系数均在0.97以上;振动波在近处衰减快,远处衰减慢;砂土的指数衰减系数为0.0704、乘幂衰减系数为1.3494.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 respectively by using the exponential decay formula and the negative power attenuation formula,and the reasonableness of the formulas is verified. The results show that（ 1） both the exponential decay formula and the negative power attenuation formula 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 vicinity and slowly in the distance; and（ 3） the exponential decay coefficient and the power attenuation coefficient of sand are respectively 0. 0704 and 1. 3494.

关 键 词：电缆击穿振动 衰减特性 模型试验 衰减系数 

分 类 号：TM7[电气工程—电力系统及自动化]