Experimental investigation into harmonic impedance of low-voltage cables

被引：10

作者：

Du, Y ^{[1
]}

Burnett, J ^{[1
]}

机构：

[1] Hong Kong Polytech Univ, Dept Bldg Serv Engn, Hong Kong, Hong Kong, Peoples R China

来源：

IEE PROCEEDINGS-GENERATION TRANSMISSION AND DISTRIBUTION | 2000年 / 147卷 / 06期

关键词：

Approximation theory - Buildings - Electric power distribution - Electric resistance measurement - Harmonic analysis;

D O I：

10.1049/ip-gtd:20000653

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Harmonic characteristics of power cables used in low-voltage distribution systems of commercia buildings are investigated. Analytical discussion of cable resistance and reactance at harmonic frequencies is presented. An experimental procedure for obtaining full matrix impedance of cables at harmonic frequency is introduced. It is found that table resistance increases with increasing harmonic order. Cable inductance, however, decreases due to the effect of flux cancellation. The analytical formulas presented yield reasonable accuracy for cable resistance for single-core cables, but provide an overestimation for multicore cables. The impact of various parameters on cable resistance and reactance. such as harmonic order, cable installation method, cable current distribution and the presence of magnetic material is also addressed, as well as the mechanisms for impedance variation. Finally, recommendations for using the approximate formulas for cables in low-voltage installations are provided.

引用

页码：322 / 328

页数：7

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