A study on harmonic current summation using field measurement data

Gu, Ye; Ćuk, V.; Cobben, J.F.G.

doi:10.1109/powercon.2016.7753887

Cited by 3 publications

(2 citation statements)

References 8 publications

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“…In addition, both the voltage and current distortions vary with different loading levels and are time-varying PQ characteristics. Hence, it is highly complex to accurately determine current harmonics magnitude and phase angle values for every time instant [15]. Summation coefficients are provided by IEC standard 61000-3-6 to perform the summation of harmonic magnitudes [16].…”

Section: Introductionmentioning

confidence: 99%

Current Harmonic Aggregation Cases for Contemporary Loads

et al. 2022

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Power electronic circuits in modern power supplies have improved the conversion efficiency on the one hand but have also increased harmonic emissions. Harmonic currents from the operation of these units affect the voltage waveforms of the network and could compromise the reliability of the network. Load and source non-linearity can, therefore, limit the renewable source’s hosting capacity in the grid, as a large number of inverter units may increase the harmonic distortions. As a result, voltage and current distortions could reach unbearable levels in devices connected to the network. Harmonic estimation modelling often relies on measurement data, and differences may appear in mathematical simulations as the harmonic aggregation or cancellation may generate different results due to the inaccuracies and limitations of the measurement device. In this paper, the effect of harmonic currents cancellation on the aggregation of different load currents is evaluated to show its impact in the network by presenting a comparison between the measurement and mathematical aggregation of harmonics. Furthermore, the harmonic cancellation phenomenon is also qualified for multiple loads connected to the power supply.

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Section: Introductionmentioning

confidence: 99%

Current Harmonic Aggregation Cases for Contemporary Loads

et al. 2022

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“…Due to the uncertainty of the magnitude and angle of the phase, values less than the arithmetic summation of the maximum amplitudes will result from the aggregation of diferent harmonics sources [6]. If the harmonic study only considers the arithmetical sum as the total harmonic, this can cause costs and mitigation eforts beyond what is necessary [7]. Terefore, cancelling efect needs to be analysed, considering the variety of harmonic phase angles [8].…”

Section: Introductionmentioning

confidence: 99%

Observations on Harmonics Summation in Transmission Systems: Alternative Aggregation Estimation

Salles

Silva

Ribeiro

2022

International Transactions on Electrical Energy Systems

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The aggregation of harmonic components from different sources is one of the critical and challenging assessments in electric power systems. Harmonic summation analysis and estimation is not a simple task since there will be variations because of the grid complexity, nonlinear sources, and unpredictable behaviour of harmonic currents that affect the results. An evaluation of harmonic summation using alternative methods to calculate the harmonic composition at any network point is suggested. A typical arrangement of transmission grids was modelled and used to simulate the results. This paper aims to highlight the results obtained by these alternative methods of harmonic summation and show the role of this type of analysis in transmission systems planning. The contributions are (a) illustrate how alternative methods of harmonic summation can be applied to investigate harmonic aggregation from different sources; (b) provide a case study that also discusses the harmonic aggregation effects with different locations of sources and component phase angle shifting; (c) show comparison and correlation between those alternative summations calculations with a standardized and firmly adopted method (proposed by IEC 61000-3-6). The software MATLAB/Simulink performs simulation and analysis. Finally, the work discusses the findings.

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