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The IEEE 519-2014 standard establishes criteria for voltage and current harmonics distortion in electrical system design. It provides detailed explanations of the existing voltage and current waveforms throughout the system and sets waveform distortion goals for system designers.
The standard undergoes periodic updates to stay aligned with industry advancements. Since its inception in 1981, it has been revised multiple times, with the most recent major update being IEEE 519-2014. Additional updates in 2022 (details available here). This article covers key term definitions and statistical evaluation techniques, focusing on the significant changes introduced in the IEEE 519-2014 edition.
To understand the aims of this document, the following terms are defined. For other terms not defined here, refer to the IEEE Standards Dictionary Online.
IEEE 519-2014 introduces new measurement methods and statistical evaluation techniques to determine compliance with recommended limits.
Harmonics Measurement Methods: Adopts the 10/12 cycle gapless harmonic subgroup measurement from IEC 61000-4-7. Aggregations of 150/180 cycles (~3 sec) and 10 min are required for statistical assessments.
Very Short Time Harmonic Measurements: Assessed over a 3-second interval based on an aggregation of 15 consecutive 12 (10) cycle windows for 60 (50) Hz power systems.
The suggested practice limits are applied at the point of common coupling (PCC) between the system owner or operator and system users. The PCC is often the point in the power system closest to the user where services to other users could be provided.
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