An estimation algorithm of harmonic source location based on ELM

Lei, Da; Yang, Yunlei; Zhang, Shifeng; Qin, BenShaung; Zhang, Xu

doi:10.1109/iciea.2019.8834307

2019 14th IEEE Conference on Industrial Electronics and Applications (ICIEA) 2019

DOI: 10.1109/iciea.2019.8834307

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An estimation algorithm of harmonic source location based on ELM

Da Lei

Yunlei Yang

Shifeng Zhang

et al.

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2024

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Cited by 2 publications

References 12 publications

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Time‐domain harmonic source location and evaluation methods based on non‐linear and time‐varying properties of devices

Zhang,

Li,

Han

et al. 2024

IET Generation Trans & Dist

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Most of the existing methods for harmonic analysis are from frequency‐domain perspective. In fact, the essential factor for generating harmonics is non‐linear characteristic or time‐varying property. Therefore, the harmonic generation mechanism and the harmonic source location method are investigated from the time domain perspective in this paper. Firstly, a general model of non‐harmonic sources is established. The non‐harmonic sources will match well with the proposed general model while the harmonic source will not. Then correlation coefficient that reflects compliance degree between each device and the general model is defined for distinguishing harmonic sources from non‐harmonic sources. On this basis, a novel time‐domain harmonic source location method is proposed. Numerous simulations and experiments have demonstrated that the proposed method has good performance under fluctuations, saturations, pre‐distortions, transient process, and resonances. The defined correlation coefficient can reflect non‐linearity/time‐varying degree of the harmonic source, which can be used for evaluating harmonic emission level of each harmonic source. On this basis, a simple harmonic responsibility division method is proposed, which is immune to possible fluctuations, pre‐distortions, saturations, resonances, and impedance variation.

show abstract

Time‐domain harmonic source location and evaluation methods based on non‐linear and time‐varying properties of devices

Zhang,

Li,

Han

et al. 2024

IET Generation Trans & Dist

View full text Add to dashboard Cite

show abstract

Electricity quality problems investigation in networks with a voltage of 0,4 kV

Biryulin

Kudelina

Brezhnev

2022

«Izvestiya vysshikh uchebnykh zavedenii. PROBLEMY ENERGETIKI»

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THE PURPOSE. Consider the issues of electricity quality in power supply systems and the results obtained by the authors of the article when monitoring the electrical energy quality in urban electrical networks with a voltage of 0.4 kV. The results of these measurements indicate that at some facilities there are violations of the electricity quality in almost all indicators. Therefore, to ensure proper quality, it is necessary to develop comprehensive measures to maintain power quality indicators within the established limits.METHODS. When solving the problem, methods of comparison and analysis of experimental data were used. RESULTS. We indicate the main problems which inevitably arise when the quality of electrical energy decreases. Present the causes of the electricity low quality. It is shown that in this case there is a violation of the various electrical receivers operation.CONCLUSION. We indicate that earlier investigations of the electrical energy quality mainly considered power supply systems and power receivers of industrial enterprises. We present the examples of poor electricity quality, including in the event of voltage fluctuations. Therefore, when developing measures to maintain the electricity quality within acceptable limits in urban electrical networks, monitoring of electricity quality indicators should be carried out. Only on the basis of its results it is necessary to develop a set of measures to improve the electricity quality. This approach is also expedient because the electricity consumers can potentially order monitoring of the electric energy quality to specialized organizations and, in case of non-compliance with the requirements of GOST 32144-2013, file lawsuits against power supply organizations about violations of the electricity quality with great chances of satisfying them.

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An estimation algorithm of harmonic source location based on ELM

Cited by 2 publications

References 12 publications

Time‐domain harmonic source location and evaluation methods based on non‐linear and time‐varying properties of devices

Time‐domain harmonic source location and evaluation methods based on non‐linear and time‐varying properties of devices

Electricity quality problems investigation in networks with a voltage of 0,4 kV

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