Study on Harmonic Impedance Estimation and Harmonic Contribution Evaluation Index [PDF]
IEEE Access, 2020 Harmonic impedance estimation and suitable evaluation index selection are the key steps of harmonic contribution evaluation. Most of the traditional harmonic impedance estimation methods are only applicable to the scenario, where the background harmonic ...
Ziteng Liu +3 more
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Impedance Characteristics and Harmonic Analysis of LCL-Type Grid-Connected Converter Cluster [PDF]
Energies, 2022 This study addresses the output impedance model of the LCL-type grid-connected converter considering the dead-time effects and the digital control delay.
Xiaojie Zhou, Dezhi Xu, Yourui Huang
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Harmonic Contribution Quantification for Multiple Harmonic Sources Based on Minimum Impedance Fluctuation [PDF]
IEEE Access, 2023 The background harmonic fluctuation has a significant impact on the results of harmonic contribution quantification. However, the existing methods, especially those applied for multiple harmonic sources scenario, usually assume that the background ...
Xin Tang +7 more
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Train Impedance Reshaping Method for Suppressing Harmonic Resonance Caused by Various Harmonic Sources in Trains-Network Systems With Auxiliary Converter of Electrical Locomotive [PDF]
IEEE Access, 2019 With the development of electrified railway, harmonic resonance accidents occur from time to time. Based on the mechanism of resonance, a harmonic resonance suppression radical method by impedance reshaping is proposed.
Shihui Liu +4 more
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Impedance matching in photonic crystal microcavities for Second Harmonic Generation [PDF]
, 2005 By numerically integrating the three-dimensional Maxwell equations in the time domain with reference to a dispersive quadratically nonlinear material, we study second harmonic generation in planar photonic crystal microresonators.
Andrea Di Falco +21 more
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Harmonic impedance estimation in frequency deviation scenario [PDF]
2018 18th International Conference on Harmonics and Quality of Power (ICHQP), 2018 Harmonic impedance is an important parameter for electrical power system analyses. This parameter can be used in some important application such as island and resonance detection. The methods used for impedance estimation can be separated in two categories: invasive and noninvasive methods.
Henrique L. M. Monteiro +5 more
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Adaptive Harmonic Impedance Control and Flexible Compensation Method for AI Data Centers [PDF]
EnergiesThe stochastic fluctuations of AI computational loads inject harmonic currents into the DC bus, amplifying bus voltage ripples and weakening the power quality. Existing strategies typically rely on high-gain control strategies to minimize harmonic output
Jinsong Li +5 more
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The study of the harmonic impedance measurement
IOP Conference Series: Materials Science and Engineering, 2019 Harmonic impedance of system is the important parameter for the harmonic suppression and it is also useful to the design of filter, circuit analysis, et al. Generally, a controllable harmonic perturbation is used and injected into the target circuit port, and then harmonic impedance can be captured by the corresponding harmonic voltage and current.
Hongtao Shi +3 more
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Utility harmonic impedance estimation based on mutual information and data optimization
电力工程技术, 2023 Accurate calculation of harmonic impedance is the premise of harmonic control and reasonable division of harmonic responsibility. The existing harmonic impedance estimation methods should meet the conditions that the background harmonic fluctuations are ...
XU Fangwei +5 more
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Solution technology of system side harmonic variable impedance based on minimum norm
电力工程技术, 2023 To calculate the harmonic impedance on the system side is crucial for the safe and stable operation of the new power system. Existing algorithms for harmonic impedance estimation usually assume that the harmonic impedance on the system side is constant ...
XU Fangwei +3 more
doaj +1 more source