电气回路存在谐波电流时导体截面的选择

Selection of Conductor's Sector Size While Harmonics Involved in Electrical Line

阐述了电气回路中谐波电流产生的原因及其引起中性线和相线过载的危险。指出在建筑电气设计中为防谐波电流引起的回路过载应相应增大中性线和相线的截面。文中还根据国际电工标准的规定,列举了按回路谐波含量百分数选择导体截面的例子。

The paper presents the causes of harmonics current and overload hazard of neutral line and phase line by harmonics in electrical line. It points out in building electrical design conductor's sector size should be enlarged in order to prevent line from overload resulted from harmonics current.It also provides some examples of selecting sector size in terms of harmonic percentage according to IEC 's regulation.