Harmful effect of harmonics is considered one of the main factors that badly affect the electricity meters’ accuracy and power quality of distribution systems. In this paper, the impact of harmonics generated by various household appliances has been investigated. Household appliances have been divided into four groups according to the similarity of their current and voltage waveforms. The appliances have been collected together according to the reason of the year and time to analyze their waveform. Experimental measurements have been performed using a standard CALMET-TE30 three-phase power quality analyzer. Measurement uncertainty calculations have been taken into consideration to acquire the actual measurement results. The waveforms of these results have been precisely plotted using a specially designed MATLAB program.

中文翻译：

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家用电器的波形失真对电能质量的影响

谐波的有害影响被认为是严重影响电表的准确性和配电系统电能质量的主要因素之一。本文研究了各种家用电器产生的谐波的影响。家用电器根据电流和电压波形的相似性分为四类。已根据年份和时间的原因将这些电器收集在一起，以分析其波形。实验测量是使用标准CALMET-TE30三相电能质量分析仪进行的。为了获得实际的测量结果，已经考虑了测量不确定度的计算。这些结果的波形已使用专门设计的MATLAB程序精确绘制。