IET Electric Power Applications, 2023 The ultra‐low frequency oscillation and poor speed regulation performance caused by the fast power control decrease the stability and efficiency of the variable speed pumped storage unit with a full size converter (FSC‐VSPSU).
Huabo Shi +4 more
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The Impact of Primary Frequency Control of WTs on Ultra-Low Frequency Oscillation
Journal of Physics: Conference Series, 2021 Abstract Since entering the 21st century, as wind power develops rapidly, wind power plays an increasingly important role in the safe and stable operation of power systems. Since the wind turbines under traditional control don’t provide frequency support, the frequency dynamics of the power grids after load disturbance will be ...
Lei Yang +6 more
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Long Term Characteristics of Ultra Low Frequency Oscillations in the Nordic Power System
2022 IEEE PES Innovative Smart Grid Technologies Conference Europe (ISGT-Europe), 2022 Publisher Copyright: © 2022 IEEE.
Seppanen, Janne +3 more
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Influence of Hydro Turbine Supervision and Control System on Frequency Characteristics of High Proportion Hydropower System [PDF]
E3S Web of Conferences, 2021 With the construction of interconnected power grid and the rapid development of clean energy, the frequency problem of power system is becoming increasingly prominent.
Wang Guanhong +8 more
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Frequency Oscillation Analysis of Power System With Multiple Governor Deadbands
IEEE Access, 2020 In recent years, the ultra-low frequency oscillation of power system is one of the most concerned frequency stability problem. The governor deadband are considered as one of the main influences.
Chengwei Fan +5 more
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The Mechanism of Ultra-Low Frequency Oscillations With the Same Mode Shapes
IEEE Access, 2020 The ultra-low frequency oscillation (ULFO) problem reappears in China recently. Different from the classical low frequency oscillation (LFO), the generators in ULFO have the same mode shapes, namely oscillating in the same pace.
Peng Wang +5 more
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Ultra Low Frequency Wave Produced by Underwater Oscillating Sphere and Its Measurement
Journal of Marine Science and Engineering, 2021 When an underwater target moves in viscous fluid, it may cause the periodic movement of the surrounding fluid and generate ultra-low-frequency (ULF) gravity waves.
Huan Wang +4 more
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Generalized Damping Torque Analysis of Ultra-Low Frequency Oscillation in the Jerk Space
CoRR, 2023 Ultra low frequency oscillation (ULFO) is significantly threatening the power system stability. Its unstable mechanism is mostly studied via generalized damping torque analysis method (GDTA). However, the analysis still adopts the framework established for low frequency oscillation. Hence, this letter proposes a GDTA approach in the jerk space for ULFO.
Yichen Zhou +3 more
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Modelling and Analysis of Frequency-Responsive Wind Turbine Involved in Power System Ultra-Low Frequency Oscillation [PDF]
IEEE Transactions on Sustainable Energy, 2022 This paper presents a dynamic analysis for ultra-low frequency oscillations (ultra-LFOs) observed in the wind-hydropower hybrid systems. In such systems, DFIG wind turbines (WTs) are required to be frequency-responsive with providing the inertia and frequency support.
Li Sun, Xiaowei Zhao
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Characterizing Quantum Effects in Optically Induced Nanowire Self-Oscillations: Coherent Properties
Photonics, 2021 Mechanical properties of metallic-nanowire self-oscillations are investigated through a coherent-state analysis. We focus on elucidating the time behavior of quantum energy in such oscillations, in addition to the analysis of fluctuations, evolution of ...
Jeong Ryeol Choi
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