The Experts below are selected from a list of 17577 Experts worldwide ranked by ideXlab platform
đani Juricic - One of the best experts on this subject based on the ideXlab platform.
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fast measurement of proton exchange membrane fuel cell Impedance based on pseudo random binary sequence perturbation signals and continuous wavelet transform
Journal of Power Sources, 2014Co-Authors: Andrej Debenjak, Pavle Boskoski, Bojan Musizza, Janko Petrovčič, đani JuricicAbstract:This paper proposes an approach to the estimation of PEM fuel cell Impedance by utilizing pseudo-random binary sequence as a perturbation signal and continuous wavelet transform with Morlet mother wavelet. With the approach, the Impedance Characteristic in the frequency band from 0.1 Hz to 500 Hz is identified in 60 seconds, approximately five times faster compared to the conventional single-sine approach. The proposed approach was experimentally evaluated on a single PEM fuel cell of a larger fuel cell stack. The quality of the results remains at the same level compared to the single-sine approach.
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fast measurement of proton exchange membrane fuel cell Impedance based on pseudo random binary sequence perturbation signals and continuous wavelet transform
Journal of Power Sources, 2014Co-Authors: Andrej Debenjak, Pavle Boskoski, Bojan Musizza, Janko Petrovčič, đani JuricicAbstract:This paper proposes an approach to the estimation of PEM fuel cell Impedance by utilizing pseudo-random binary sequence as a perturbation signal and continuous wavelet transform with Morlet mother wavelet. With the approach, the Impedance Characteristic in the frequency band from 0.1 Hz to 500 Hz is identified in 60 seconds, approximately five times faster compared to the conventional single-sine approach. The proposed approach was experimentally evaluated on a single PEM fuel cell of a larger fuel cell stack. The quality of the results remains at the same level compared to the single-sine approach.
Andrej Debenjak - One of the best experts on this subject based on the ideXlab platform.
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fast measurement of proton exchange membrane fuel cell Impedance based on pseudo random binary sequence perturbation signals and continuous wavelet transform
Journal of Power Sources, 2014Co-Authors: Andrej Debenjak, Pavle Boskoski, Bojan Musizza, Janko Petrovčič, đani JuricicAbstract:This paper proposes an approach to the estimation of PEM fuel cell Impedance by utilizing pseudo-random binary sequence as a perturbation signal and continuous wavelet transform with Morlet mother wavelet. With the approach, the Impedance Characteristic in the frequency band from 0.1 Hz to 500 Hz is identified in 60 seconds, approximately five times faster compared to the conventional single-sine approach. The proposed approach was experimentally evaluated on a single PEM fuel cell of a larger fuel cell stack. The quality of the results remains at the same level compared to the single-sine approach.
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fast measurement of proton exchange membrane fuel cell Impedance based on pseudo random binary sequence perturbation signals and continuous wavelet transform
Journal of Power Sources, 2014Co-Authors: Andrej Debenjak, Pavle Boskoski, Bojan Musizza, Janko Petrovčič, đani JuricicAbstract:This paper proposes an approach to the estimation of PEM fuel cell Impedance by utilizing pseudo-random binary sequence as a perturbation signal and continuous wavelet transform with Morlet mother wavelet. With the approach, the Impedance Characteristic in the frequency band from 0.1 Hz to 500 Hz is identified in 60 seconds, approximately five times faster compared to the conventional single-sine approach. The proposed approach was experimentally evaluated on a single PEM fuel cell of a larger fuel cell stack. The quality of the results remains at the same level compared to the single-sine approach.
Heng Nian - One of the best experts on this subject based on the ideXlab platform.
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analysis and reshaping on Impedance Characteristic of dfig system based on symmetrical pll
IEEE Transactions on Power Electronics, 2020Co-Authors: Heng Nian, Liang Chen, Frede BlaabjergAbstract:With the increasing penetration of renewable energy, wind turbines based on doubly fed induction generators (DFIG) are becoming more and more important in the power system. The Impedance reshaping control strategy based on the virtual Impedance method can be utilized to solve the stability problem of the DFIG-grid interconnected system under the weak grid. However, the stability issues caused by phase-locked loop (PLL) is more complicated due to the frequency coupling Characteristic. This article presents an improved control strategy of the DFIG system based on a symmetrical PLL, in which the frequency coupling Characteristic can be avoided and the system can be simplified as a single-input single-output system that facilitates the design of virtual Impedance. The influence of symmetrical PLL on the operation of the DFIG system is studied, and an improved Impedance reshaping control strategy is proposed. Simulation and experimental results are conducted to verify the effectiveness of the proposed Impedance reshaping control strategy.
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Harmonic Impedance Modeling of DFIG Considering Dead Time Effect of Rotor Side Converter
2018 IEEE Energy Conversion Congress and Exposition (ECCE), 2018Co-Authors: Chao Wu, Heng Nian, Peng Cheng, Qi Zhou, Bo PangAbstract:This paper proposes a novel harmonic Impedance modeling method of doubly fed induction generator (DFIG) considering the dead time effect. The dead time of the rotor side converter (RSC) will induce distorted voltage to the rotor side of DFIG. By obtaining the transfer function from stator voltage and rotor distorted voltage to stator current, the admittance of RSC+DFIG can be deduced. Considering that the harmonic currents caused by the dead time work as a current source, the Norton equivalent circuit of RSC+DFIG can be obtained. In this way, the harmonic currents not only caused by the grid harmonic voltages but also the dead time effect can be both accurately acquired, which is very useful for the harmonic currents analysis for wind farm. Furthermore, the Impedance Characteristic of RSC+DFIG is also obtained which is useful for harmonic resonance analysis. Finally, the correctness of the equivalent circuit and stator harmonic currents is validated by the simulation results.
Bojan Musizza - One of the best experts on this subject based on the ideXlab platform.
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fast measurement of proton exchange membrane fuel cell Impedance based on pseudo random binary sequence perturbation signals and continuous wavelet transform
Journal of Power Sources, 2014Co-Authors: Andrej Debenjak, Pavle Boskoski, Bojan Musizza, Janko Petrovčič, đani JuricicAbstract:This paper proposes an approach to the estimation of PEM fuel cell Impedance by utilizing pseudo-random binary sequence as a perturbation signal and continuous wavelet transform with Morlet mother wavelet. With the approach, the Impedance Characteristic in the frequency band from 0.1 Hz to 500 Hz is identified in 60 seconds, approximately five times faster compared to the conventional single-sine approach. The proposed approach was experimentally evaluated on a single PEM fuel cell of a larger fuel cell stack. The quality of the results remains at the same level compared to the single-sine approach.
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fast measurement of proton exchange membrane fuel cell Impedance based on pseudo random binary sequence perturbation signals and continuous wavelet transform
Journal of Power Sources, 2014Co-Authors: Andrej Debenjak, Pavle Boskoski, Bojan Musizza, Janko Petrovčič, đani JuricicAbstract:This paper proposes an approach to the estimation of PEM fuel cell Impedance by utilizing pseudo-random binary sequence as a perturbation signal and continuous wavelet transform with Morlet mother wavelet. With the approach, the Impedance Characteristic in the frequency band from 0.1 Hz to 500 Hz is identified in 60 seconds, approximately five times faster compared to the conventional single-sine approach. The proposed approach was experimentally evaluated on a single PEM fuel cell of a larger fuel cell stack. The quality of the results remains at the same level compared to the single-sine approach.
Janko Petrovčič - One of the best experts on this subject based on the ideXlab platform.
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fast measurement of proton exchange membrane fuel cell Impedance based on pseudo random binary sequence perturbation signals and continuous wavelet transform
Journal of Power Sources, 2014Co-Authors: Andrej Debenjak, Pavle Boskoski, Bojan Musizza, Janko Petrovčič, đani JuricicAbstract:This paper proposes an approach to the estimation of PEM fuel cell Impedance by utilizing pseudo-random binary sequence as a perturbation signal and continuous wavelet transform with Morlet mother wavelet. With the approach, the Impedance Characteristic in the frequency band from 0.1 Hz to 500 Hz is identified in 60 seconds, approximately five times faster compared to the conventional single-sine approach. The proposed approach was experimentally evaluated on a single PEM fuel cell of a larger fuel cell stack. The quality of the results remains at the same level compared to the single-sine approach.
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fast measurement of proton exchange membrane fuel cell Impedance based on pseudo random binary sequence perturbation signals and continuous wavelet transform
Journal of Power Sources, 2014Co-Authors: Andrej Debenjak, Pavle Boskoski, Bojan Musizza, Janko Petrovčič, đani JuricicAbstract:This paper proposes an approach to the estimation of PEM fuel cell Impedance by utilizing pseudo-random binary sequence as a perturbation signal and continuous wavelet transform with Morlet mother wavelet. With the approach, the Impedance Characteristic in the frequency band from 0.1 Hz to 500 Hz is identified in 60 seconds, approximately five times faster compared to the conventional single-sine approach. The proposed approach was experimentally evaluated on a single PEM fuel cell of a larger fuel cell stack. The quality of the results remains at the same level compared to the single-sine approach.