摘要
当今110 kV及以上的高压、大截面交联聚乙烯(XLPE)电力电缆多采用单芯结构。对于不同长度的电缆线路其金属护套的接地方式亦不尽相同,从而对电缆线路参数,尤其是对零序阻抗将产生较大的影响。通过对热津一、二线220 kV电缆线路在金属护套交叉互联系统改造前后进行线路参数的实际测量,分析了金属护套不同的接地方式下对零序阻抗及互感阻抗产生影响的原因,提出了相应的改进措施。
At present, usually single core is used for high voltage large size XLPE power cables 110 kV and above. The earthing method of the metal sheath varies somewhat in different cable lengths, which affects greatly line parameters, especially zero sequence impedance. The cause why the earthing method of the metal sheath affects zero sequence impedance and mutual inductance impedance is analyzed by measurements of line parameters before and after the renovation of the cross-connection system of the metal sheath in the 220 kV cables in Rehe-Tianjin Line 1 and 2 and measures for improvement are proposed.
出处
《电线电缆》
2009年第2期43-46,共4页
Wire & Cable
关键词
高压电力电缆
金属护套
接地方式
线路参数
high voltage power cable
metal sheath
earthing method
line parameters
