Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/49755
Title: PLL Based Method for Supraharmonics Emission Assessment
Keywords: Frequency measurement
Detectors
Phase locked loops
Standards
Time measurement
Receivers
Time-frequency analysis
Issue Date: 2021
Publisher: Institute of Electrical and Electronics Engineers
Citation: MENDES, T. M. et al. PLL Based Method for Supraharmonics Emission Assessment. IEEE Transactions on Power Delivery, [S. I.], 2021. DOI: 10.1109/TPWRD.2021.3112404.
Abstract: Supraharmonic (SH) disturbances are generated mainly by power electronics whose usage has increased significantly in the last decades. Consequently, supraharmonics have increased as well. The SH frequency range from 2~kHz to 150~kHz still lacks a normative measurement method. Compatibility levels and emission limits of SH are commonly presented as quasi-peak (QP) detector values for a bandwidth (BW) of 200~Hz measured by CISPR~16 receivers. In this context, this paper proposes an optimized method emulating the CISPR~16 receiver with QP detector for measuring grid disturbance levels. It makes innovative use of PLL (Phase-Locked Loop) units for estimating the highest distortion levels in the SH frequency range of the test signal, and in sequence, the QP detector with the appropriate specifications in the CISPR~16 standard is applied. Different cases of both synthetic and real signals were applied to the proposed method, which showed to be efficient in evaluating SH levels for current and voltage signals. An analysis of maximum permissible distortion levels is performed considering an individual SH distortion. In addition, the proposed method presents a computational cost reduction of approximately 91\% in relation to the CISPR~16 method onsidering a specific case of signal containing SH distortions used for power quality analysis.
URI: https://ieeexplore.ieee.org/document/9537588
http://repositorio.ufla.br/jspui/handle/1/49755
Appears in Collections:DAT - Artigos publicados em periódicos
DEG - Artigos publicados em periódicos

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