3次谐波电流对照明线路导体截面选择的影响

Third Harmonic Current Affecting on Conductor Cross Section in Lighting Circuit

照明配电系统中,气体放电灯产生的3次谐波电流对中性线导体电流影响很大。分析了3次谐波电流在三相四线制线路中的影响,导体截面选择的依据和相关计算。实例计算分析结果表明,在照明供电线路中,3次谐波电流对导线截面的选择起决定作用,因此在照明线路的设计中应考虑谐波的影响,避免供电事故的发生。

The third harmonic current of gas discharge lamp has a very large impact on the current of neutral conductor in lighting distribution system. The influences of third harmonic current were analyzed in three-phase four-wire line, and the conductor cross section selection basis and related calculation. Calculation analysis results show that in the lighting power supply circuit for conductor cross section clue to third harmonic current selection decision role, so in the design of lighting uircuit should consider the influence of harmonic, to avoid power supply accidents.