Abstract
Recently, with the increase in home electric appliances with power electronics devices, influences of harmonics are increasing. In order to investigate influences due to harmonics currents, grasp of waveforms for electric appliances in use in low voltage distribution system is important. In this study, four types of electric appliances were chosen as a single-phase load used on low voltage distribution system, and harmonic characteristics were measured. Measured data were compared with limits for harmonic emissions calculated by the standards of JIS C 61000-3-2 (Electromagnetic compatibility (EMC)-Part 3-2: Limits). Subsequently, average harmonic current characteristics profiles for four types of appliances were obtained. EMTP model for appliances using this profile was developed.
