Study on Third Harmonic Suppression Experiment with Low-Voltage Distribution Power System

Abstract

To deal with the problem of ever increasing harmonic content in low-voltage distribution power system. A comparative experimental study on limiting the third harmonic current with low-voltage distribution power system in a residential area in Shijiazhuang. We’ve designed an experimental plan to limit the third harmonic under the condition of three-phase four-wire system and measured the impact of the limitation on current, voltage, current distortion rate, active power and distortion power. The results shows that limiting the third harmonic current can notably reduce the distortion power of low-voltage distribution power system and thus improve the electricity quality, but there's no significant power saving effect.