Results 21 to 30 of about 500 (164)
IEEE Access, 2022 In order to eliminate the harmonics of the grid connected inverters accurate harmonic detection is essential. Though there are many kinds of different harmonic detection methods are available, it can hardly be achieved without the help of grid frequency ...
Tawfique Uzzaman +2 more
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Eletrônica de Potência, 2017 This paper proposes the application of an accurate, fast and stable method to be used by the control systems in the selective compensation of harmonic currents in three phase systems susceptible to frequency changes and phase jumps.
Cássio Xavier Rocha +3 more
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One-Step-Prediction Discrete Observer Based Frequency-Locked-Loop Technique for Three-Phase System
IEEE Access, 2021 In grid-tied power converters, the grid parameters such as the frequency, phase angle of the fundamental component, and the harmonics are essential to the control of power converters, the fast and accurate estimation of the grid parameters is a challenge
Wei Hu +6 more
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Inertia Enhancement Control Strategy Based on Frequency-Locked Loop for Grid Connected Converter [PDF]
Dianli jianshe[Objective] With the increasing penetration of renewable energy sources， traditional rotating machines have been replaced with power electronic converters， causing a considerable decline in the overall inertia of power systems.
LI Xing, ZHAI Baoyu, LIANG Shuchao, TANG Weihan, CHEN Zhangyong, CHEN Yong
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Suppressing Harmonics in Resolver Signals via FLL-Based Complementary Filters
IEEE Access, 2021 In order to obtain accurate angular position and velocity from resolver signals, Resolver-to-Digital Conversion (RDC) is necessary. However, there are inevitable harmonics in resolver signals, which will deteriorate RDC accuracy seriously.
Rui Wang, Zhong Wu, Yongli Shi
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Synchronization signal extraction method based on enhanced DSSOGI-FLL in power grid distortion
Systems Science & Control Engineering, 2018 With the development of new energy, three-phase grid connected converter has been widely applied. In order to meet the requirement of synchronous signals extraction under the condition of asymmetry, dc components and harmonic distortion, the positive and
Xuhu Ren +4 more
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Energies, 2018 Adaptive proportional resonant (PR) controllers, whose resonant frequencies are obtained by the phase-locked loop (PLL), are employed in grid connected voltage source converters (VSCs) to improve the control performance in the case of grid frequency ...
Xing Li, Hua Lin
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IEEE Access, 2020 In order to track weak signals, GNSS receivers often use a frequency-locked loop (FLL) to track the carrier frequency. The performance of the frequency discriminator directly affects the receiver's signal tracking capability in the FLL.
Li Cheng +3 more
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Universal Grid-Forming Method for Future Power Systems
IEEE Access, 2022 Power system inertia typically refers to the energy stored in large rotating synchronous generators. Dynamics and stability of the traditional power system is closely linked to the natural inertia of these synchronous generators.
Hannu Laaksonen
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Carrier tracking algorithm based on joint acquisition of frequency locked loop and phase locked loop
, 2017 Aiming at the problem of frequency step in the frequency lock loop (FLL) - phase lock loop (PLL) carrier tracking algorithm’s conversion state, presenting an improved algorithm: PLL and FLL joint acquisition to replace the single FLL acquires frequency ...
Peng BaoTong, Zhao Qiang, Gao Kang
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