Comparison of Measurement Methods for the Frequency Range 2–150 kHz (Supraharmonics) Based on the Present Standards Framework

Khokhlov, Victor; Meyer, Jan; Grevener, Anne; Busatto, Tatiano; Rönnberg, Sarah

doi:10.1109/access.2020.2987996

Cited by 57 publications

(20 citation statements)

References 12 publications

(23 reference statements)

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“…More accurate results for SH current versus frequency were shown, although only one element, an EV charger, was used as a source of emissions. Some authors, [4] and [13], presented comparative applications for the standard-based methods. Through these tests, applying the two mentioned methodologies was performed individually for each of the four cases.…”

Section: A Overview Of Sh Measurement Methodsmentioning

confidence: 99%

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Supraharmonics in Power Grid: Identification, Standards, and Measurement Techniques

et al. 2021

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In the electric power distribution system, power electronics technologies associated with renewable energy systems (RES) and smart grids have gained growing interest. The power electronics devices are used to convert, control, or transfer electric power from RES to the power grids. However, the continuous increase in switching frequencies resulting from these power electronics technologies has led to the emergence of new emissions in the range of 2-150 kHz, outside the classical frequency range for power quality. These emissions are known worldwide as supraharmonics (SH).These emissions negatively affect the power quality of electrical distribution systems and reduce their efficiency and lifetime. Thus, the supraharmonics emissions have been investigated in the literature, and several methods were developed focusing on identifying, measuring, and setting new standards to mitigate the impact of these emissions on the power quality. Although these individual studies have been well documented, a comparative overview of its identifications, current standards, and measurement techniques had not been described so far. Therefore, this study extensively reviews the related techniques and standards for identifying, measuring, and mitigating SH emissions. Moreover, the current research gap in this important field is highlighted, and an illustration on how this problem was tackled in the past few years is presented. Additionally, the SH characteristics alongside with insights into the mitigations and measurements are highlighted and analyzed accordingly. Finally, some important recommendations to mitigate SH emissions are suggested. This review will hopefully strengthen the efforts toward the development of SH domain by providing the necessary groundwork for further mitigations, standards, and measuring techniques improvement. INDEX TERMS Grid integration; harmonics emissions; high frequency; power quality; renewable energy sources; supraharmonics.

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Section: A Overview Of Sh Measurement Methodsmentioning

confidence: 99%

“…519. In [13], some of the measurement methods described in the present standards have been deeply compared, including the method in CISPR 16-1-1. Other studies have deeply described the signal processing techniques to identify lower-and higher-frequency phenomena based on SH emission band identification.…”

Section: Introductionmentioning

confidence: 99%

Supraharmonics in Power Grid: Identification, Standards, and Measurement Techniques

et al. 2021

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“…A pivotal role in comparing measurement methods is played by the test signals employed in the analysis. Some previous studies were based on simple single-frequency tones of constant or variable amplitude [10], [12], which is appropriate for assessing the amplitude accuracy of specific frequencies in laboratory conditions, but far from being a faithful representation of the distortion that can be found in power networks. More complex signals, including representative grid recordings have been utilized [9], [12], but these cannot be used to calculate the accuracy of the methods, since their true frequency content is unknown.…”

Section: Description Of Test Signals a Generation Of Synthetic mentioning

confidence: 99%

“…At present, the relevant standards specify only informative (non-normative) field measurement methods for assessment of grid compliance [6], [7], [8]. Comparisons between these measurement methods have been performed and published, discussing the differences in their characteristics, testing them with simple synthetic signals, or comparing their performance with recorded grid signals [9], [10], [11], [12]. However, in recent years many efforts have been put into developing alternative measurement methods.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Measurement Methods for 2–150-kHz Conducted Emissions in Power Networks

Ritzmann

Lodetti

Veg

et al. 2021

IEEE Trans. Instrum. Meas.

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This paper presents a comparison of measurement methods for current and voltage distortion in low voltage networks in the frequency range from 2 kHz to 150 kHz (supraharmonics). The comparison encompasses the methods informatively described in IEC and CISPR international standards, as well as other innovative techniques presented in the literature. The presented work is carried out within a novel framework that includes advanced and complex synthetic test signals, as well as real grid recordings, that allow an accurate comparison of the performance of the tested methods. Specifically designed indices are employed to characterize the accuracy of the tested methods in the frequency and amplitude assessment. In light of that, strengths and weaknesses of the methods are identified. The results of this paper contribute to the ongoing standardization work carried out by the IEC SC77A/WG9 with the purpose of defining a normative measurement method suitable for assessing grid disturbance levels in the range from 2 kHz to 150 kHz.

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“…At present, the relevant standards specify only informative (nonnormative) field measurement methods for assessment of grid compliance [6]- [8]. Comparisons between these measurement methods have been performed and published, discussing the differences in their characteristics, testing them with simple synthetic signals, or comparing their performance with recorded grid signals [9]- [12]. However, in recent years, many efforts have been put into developing alternative measurement methods.…”

Section: Introductionmentioning

confidence: 99%

Measurement of 2–150 kHz Conducted Emissions in Power Networks

Ritzmann

Wright

Meyer

et al. 2020

2020 Conference on Precision Electromagnetic Measurements (CPEM)

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This article presents a comparison of measurement methods for current and voltage distortions in low-voltage networks in the frequency range from 2 to 150 kHz (supraharmonics). The comparison encompasses the methods informatively described in IEC and CISPR international standards, as well as other innovative techniques presented in the literature. This work is carried out within a novel framework that includes advanced and complex synthetic test signals, as well as real grid recordings that allow an accurate comparison of the performance of the tested methods. Specifically designed indices are employed to characterize the accuracy of the tested methods in the frequency and amplitude assessments. In light of that, the strengths and weaknesses of the methods are identified. The results of this article contribute to the ongoing standardization work carried out by the IEC SC77A/WG9 with the purpose of defining a normative measurement method suitable for assessing grid disturbance levels in the range from 2 to 150 kHz.

show abstract

Comparison of Measurement Methods for the Frequency Range 2–150 kHz (Supraharmonics) Based on the Present Standards Framework

Cited by 57 publications

References 12 publications

Supraharmonics in Power Grid: Identification, Standards, and Measurement Techniques

Supraharmonics in Power Grid: Identification, Standards, and Measurement Techniques

Comparison of Measurement Methods for 2–150-kHz Conducted Emissions in Power Networks

Measurement of 2–150 kHz Conducted Emissions in Power Networks

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