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Harmonic Stability in Power Electronic Based Power Systems: Concept, Modeling, and Analysis
2018
IEEE Transactions on Smart Grid
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Since 2009, he has been with Aalborg University, where he is currently an Associate Professor with the Department of Energy Technology. ...
Index Terms-Harmonic stability, damping, power electronics, power systems, resonance. ...
The other case is the negative damping added above the Nyquist frequency by the ACC loop with the reduced time delay [15] , and the negative damping may destabilize the LC resonance frequency above the ...
doi:10.1109/tsg.2018.2812712
fatcat:n6sn6qxolnca5ejsmnfalm2si4
Harmonic transfer functions based controllers for linear time-periodic systems
2018
Transactions of the Institute of Measurement and Control
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On the other hand, there are also some studies that focus on data-driven identification of LTP systems with unknown state-space formulations. ...
We propose a new methodology to design P-, PD-and PIDtype controllers for LTP systems using Nyquist diagrams and the eigenlocus of the HTFs. ...
Research Council of Turkey (TÜ BITAK) granted to Elvan Kuzucu. ...
doi:10.1177/0142331218778748
fatcat:5p3cx6tq3jectmnaykrmdxepxa
Utilizing the cochlea as a bio-inspired compressive sensing technique
2013
Smart materials and structures (Print)
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The nervous system is capable of real-time processing and data transmission of external stimuli through an extremely condensed format with very basic processing units. ...
However, a number of performance bottlenecks remain including challenges with cost-effectively scaling monitoring systems up to large nodal counts. ...
The authors would like to express deep gratitude to Mr Sean O'Connor and Professor Anna Gilbert for their insight and assistance with compressive sensing methods. ...
doi:10.1088/0964-1726/22/10/105027
fatcat:r5azeekunfdnpk47vqdzk7fnya
Analysis and Mitigation of Harmonic Resonances in Multi–Parallel Grid–Connected Inverters: A Review
2022
Energies
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The concepts are illustrated by means of an example case of multiple inverters operating in a low voltage distribution system. ...
With the move towards decarbonization of the energy system and increased use of renewable generation, the number of power electronics converter interfaced resources connecting to the grid is growing. ...
Conflicts of Interest: The authors declare no conflict of interest. ...
doi:10.3390/en15155438
fatcat:adzxz7iumfh73ioecpkcioppmy
Amplitude modulation in δ Sct stars: statistics from an ensemble study ofKeplertargets
2016
Monthly notices of the Royal Astronomical Society
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We analyse and discuss examples of δ Sct stars with constant amplitudes and phases; those that exhibit amplitude modulation caused by beating of close-frequency pulsation modes; those that exhibit pure ...
amplitude modulation (with no associated phase variation); those that exhibit phase modulation caused by binarity; and those that exhibit amplitude modulation caused by nonlinearity. ...
AC K N OW L E D G E M E N T S We thank the anonymous reviewer for their feedback that improved this paper. We also thank professor Hideyuki Saio for useful discussions. ...
doi:10.1093/mnras/stw1153
fatcat:jyb65hcndnfodammr65aruu5au
Design Space Optimization of a Three-Phase LCL Filter for Electric Vehicle Ultra-Fast Battery Charging
2021
Energies
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In particular, the grid-side filter, which ensures sinusoidal current absorption with low pulse-width modulation (PWM) harmonic content, can be a major contributor to the overall converter size and losses ...
Moreover, separate tests are performed with different values of grid inner impedance, verifying the converter control stability in various operating conditions and supporting the general validity of the ...
The digital sampling and update process is performed once per switching period ( f s = f sw = 20 kHz), however the current feedback values are obtained by means of oversampling (32 samples per switching ...
doi:10.3390/en14051303
fatcat:zmoz2mps25g7jni4oq5j3uongy
High-performance speed estimation ofinduction machines based on adaptivefiltering
2019
IET electric power applications
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The capability of using the estimated signal as speed feedback in a sensorless drive is tested and confirmed. ...
The estimator structure is proposed, for extracting and tracking the RSH found in the stator line current, which offers improved results compared with previously published methods. ...
The maximal theoretical speed is determined by the sampling frequency, according to the Nyquist-Shannon theorem. ...
doi:10.1049/iet-epa.2019.0609
fatcat:p7ko3jmoozakdgrdesa2gjqc74
Model cerebellar granule cells can faithfully transmit modulated firing rate signals
2014
Frontiers in Cellular Neuroscience
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inhibitory feedback (open-loop mode). ...
utilized, especially in combination with push-pull coding. ...
ACKNOWLEDGMENTS This work was supported by a grant from the European Union (REALNET, 270434 FP7) and a grant from the Italian Ministry of Health (GR-2009-143804). ...
doi:10.3389/fncel.2014.00304
pmid:25352777
pmcid:PMC4195316
fatcat:czdofdtkyfbsfbgdb3lnwne4ji
Extremum Seeking Tuning for Reel Tension Control in Haptic Application
2009
AIP Conference Proceedings
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Such a system is usually controlled sub-optimally due to the complexity of its model. ...
The solution of this optimization gives a direct measure of the reel dynamic transparency evaluated by the proposed cost function. ...
| = γ 2(1 − cos ω) , (19) with a null response at exactly the Nyquist frequency. ...
doi:10.1063/1.3106485
fatcat:kahyhiph3zhb3nn64saphvdvie
A digital feedback system for advanced ion manipulation techniques in Penning traps
2021
Review of Scientific Instruments
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The possibility of applying active feedback to a single ion in a Penning trap using a fully digital system is demonstrated. ...
feedback parameters. ...
It can be found that the application of feedback with a phase of 0 ○ or 180 ○ can be used to arbitrarily modify the damping of the ion, γ fb = γ(1 − Re{G}). (5) This opens up the possibility of achieving ...
doi:10.1063/5.0064369
pmid:34717400
fatcat:f6ijxtycmvhzdnswld5f2jzoqe
2021 Index IEEE Transactions on Circuits and Systems II: Express Briefs Vol. 68
2021
IEEE Transactions on Circuits and Systems - II - Express Briefs
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The primary entry includes the coauthors' names, the title of the paper or other item, and its location, specified by the publication abbreviation, year, month, and inclusive pagination. ...
., +, TCSII Jan. 2021 381-385 Parameters Measurement of Multiple Exponentially Damped Sinusoids With Sub-Nyquist Sampling. ...
Yang, S.Y., +, TCSII July 2021 2404-2408 Parameters Measurement of Multiple Exponentially Damped Sinusoids With Sub-Nyquist Sampling. ...
doi:10.1109/tcsii.2022.3144928
fatcat:bm53w7gva5bthholfhhiq4yg3a
A Digital Feedback System for Advanced Ion Manipulation Techniques in Penning Traps
[article]
2021
arXiv
pre-print
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The use of FPGA technology allowed the implementation of a fully-featured data acquisition system, making it possible to realize feedback techniques that require constant monitoring of the ion signal. ...
The system's capabilities were demonstrated by applying feedback to the ion detection system primarily consisting of a resonant circuit. ...
•
ferred using multiple cycles with varying phase evolution
times. ...
arXiv:2110.01404v1
fatcat:2sy6m6cljzgqfaxbuwckvg5bmu
Active noise control
1993
IEEE Signal Processing Magazine
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by a sinusoidal reference signal with four samples/cycle and a four-sample delay in the secondary path. ...
The feedback control architecture illustrated in Fig. 7c can be readily extended to plants with multiple inputs and multiple outputs. ...
doi:10.1109/79.248551
fatcat:5dzcrcq5zzdfdcxgrhudxtlvg4
Performance Oriented DSP for Flexible Long Haul Coherent Transmission
2021
Journal of Lightwave Technology
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In long haul optical fiber communication networks, which can span thousands of kilometers, bandwidth is at a premium due to the relatively low availability of optical fibers when compared with network ...
Therefore, these networks require the highest performance in the physical layer, with transceivers that are capable of extracting all the available capacity from each optical fiber. ...
Citation information: DOI 10.1109/JLT.2021.3134155, Journal of Lightwave Technology ...
doi:10.1109/jlt.2021.3134155
fatcat:hq65xpf6zbajdbmuzdmlfmmkz4
Adapting a Cryogenic Sapphire Oscillator for Very Long Baseline Interferometry
2011
Publications of the Astronomical Society of the Pacific
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Hydrogen masers have traditionally been used as VLBI references, but atmospheric turbulence typically limits (sub) millimeter VLBI coherence times to ~1-30 s. ...
of astrophysical phenomena. ...
With Nyquist sampling at two bits, the aggregate data rate for a single polarization was 1 Gbit s À1 . At GGAO, a hydrogen maser provided the frequency reference for all VLBI instrumentation. ...
doi:10.1086/660156
fatcat:ag4g3ewpirggjbpkz3dkqhbote
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