Analysis of supra-harmonics in smart grids

Yalçin, Turgay; Ozdemir, Muammer; Kostyła, Paweł; Leonowicz, Zbigniew

doi:10.1109/eeeic.2017.7977812

Cited by 21 publications

(8 citation statements)

References 11 publications

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“…In this case, the SH comes from the switching circuits of the inverter, which can be pumped into the grid as long as the inverter is in operation. However, If the inverter does not work or generate output (not operating), the unit will become a basin of SH [25]. The RE sources integrated into the main grid, which uses inverters as an output interface, can produce significant harmonics in the SH range.…”

Section: B Supraharmonics Characteristicsmentioning

confidence: 99%

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: B Supraharmonics Characteristicsmentioning

confidence: 99%

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

et al. 2021

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“…In this case, SH originates from the inverter switching circuits and is then pumped into the grid for as long as the inverter operates. When the inverter is not operating or producing output, the device can become a sink for SH [104]. For the harmonic current at the interface of a device or a complete installation, the basic principles are the same and the MG or main grid depends on sources inside and outside of the device [96].…”

Section: B Characteristics Of Shmentioning

confidence: 99%

Power Quality in Microgrids Including Supraharmonics: Issues, Standards, and Mitigations

et al. 2020

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A microgrid (MG) is a small-scale power system with a cluster of loads and distributed generators operating together through energy management software and devices that act as a single controllable entity with respect to the grid. MG has become a key research element in smart grid and distribution power systems. MG mainly contains different renewable energy sources (RESs) that use various technological advancements, such as power electronics-based technologies. However, it has an unstable output, thereby causing different types of power quality (PQ) events. As a result, standards and mitigation methods have been developed in recent years. To mitigate PQ issues due to MG integration, various methods and standards have been proposed over the last years. Although these individual methods are well documented, a comparative overview had not been introduced so far. Thus, this study aims to fill the gap by reviewing and comparing the prior-art PQ issues, solutions, and standards in MGs. We compare the main issues related to voltage sag, voltage swell, voltage and current harmonics, system unbalances, and fluctuations to ensure high-quality MG output power. The new technologies associated with MGs generate harmonics emission in the range of 2-150 kHz, thereby causing a new phenomenon, namely, supraharmonics (SH) emission, which is not sufficiently covered in the literature. Therefore, the characteristics, causes, consequences, and measurements of SH are highlighted and analyzed. The mitigation strategies, control, and devices of PQ issues are also discussed. Moreover, a comparison is conducted between the most popular devices used to mitigate the PQ issues in MG in terms of cost, rating, and different aspects of performance. This review study can strengthen the efforts toward the mitigation and standards development of PQ issues in MG applications, especially SH. Finally, some recommendations and suggestions to improve PQ of MG, including SH, are highlighted.

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“…The problems associated with the presence of powerelectronic devices in power systems are gaining attention given the high penetration of FACTS, distributed generation units (DGUs), active filters, HVDC transmission, among others. Due to this trend, well-known undesirable harmonic effects such as increasing the equipment ratings [24]- [26] and losses [27]- [29], decreasing the equipment reliability [30], [31] and interference with the communication systems [3], among others, are becoming more critical in many different aspects of the system [32]. Most of the analyses performed on powerelectronic-based systems (e.g., stability, design, capacity planning, etc.)…”

Section: Literature Reviewmentioning

confidence: 99%

“…The new interactions have given rise to new phenomena, which was previously unexpected. Regarding power quality, the new harmonic generation patterns have triggered the analysis of supra-harmonics [3] and recommendations for the modeling of components. Concerning power system stability, the new dynamic interactions have led to a new stability problem currently known as harmonic or electromagnetic transient stability.…”

Section: Introductionmentioning

confidence: 99%

Frequency Domain Methods for Accuracy Assessment of Wideband Models in Electromagnetic Transient Stability Studies

Segundo

Bayo-Salas

Esparza³

et al. 2020

IEEE Trans. Power Delivery

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Modern power systems face several problems at frequencies above the range of traditional stability studies due to the increasing penetration of power electronic devices. This phenomenon has been recently referred to as electromagnetic transient stability and is a growing issue in systems with power electronic converters at any power and voltage level, such as FACTS, HVDC, interfaces for grid connection of renewable energies, custom power devices for power quality enhancement, among others. The study of power systems stability is usually carried out by simulation tools that represent the power system through phasor models. However, due to the faster dynamics of modern systems, the harmonic interaction among the controllers, the converters, and the electric power components, recent research results suggest that some stability analysis should be conducted with models suitable for wider frequency ranges, e.g., electromagnetic transient models. This paper reviews the use of frequency domain methods to analyze the influence of the modeling approach of passive power components on the results of electromagnetic transient stability studies.

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Analysis of supra-harmonics in smart grids

Cited by 21 publications

References 11 publications

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

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

Power Quality in Microgrids Including Supraharmonics: Issues, Standards, and Mitigations

Frequency Domain Methods for Accuracy Assessment of Wideband Models in Electromagnetic Transient Stability Studies

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