Analysis of Power Quality Evaluation Method Stipulated by IEC 62749: Assessment of power quality-Characteristics of electricity supplied by public networks

Abstract

Combined with the evaluation methods stipulated by IEC 62749 for power quality and by IEC 61000 series standards for EMC (Electromagnetic Compatibility), it elaborated the fundamental thoughts from the power quality evaluation in IEC 62749, analyzed the differences between the two evaluation methods and summerized their basic steps. By examples listed here, it explained that the evaluation method for power quality is harsher than the one for EMC, although the limitation values of power quality is as equal as limitation values of EMC. This conclusion is also the major concern of IEC 62749 for its various limitation stipulations.

Keywords

• IEC 62749
• power quality
• EMC
• 95% percentile value
• evaluation method