Results 11 to 20 of about 19,209 (287)
EnergiesIn response to the requirements of mitigating ultra-low frequency oscillation (ULFO) and enhancing primary frequency regulation (PFR) performance in hydropower-dominated systems, a novel control strategy, namely the center-frequency-structured governor ...
Yong Jia +5 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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Energies, 2020 In recent years, ultralow-frequency oscillation has repeatedly occurred in asynchronously connected regional power systems and brought serious threats to the operation of power grids.
Sijia Wang +3 more
doaj +2 more sources
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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FLC-Based Ultra-Low-Frequency Oscillation Suppression Scheme for Interconnected Power Grids
EnergiesThe appearance of ultra-low-frequency oscillations in the grid at the sending end, after asynchronous grid interconnection, poses a significant threat to the stable operation of the system. For post-asynchronous interconnection in a multi-DC transmission
Chao Xing +7 more
doaj +2 more sources
Ultra-low frequency oscillation analysis and robust fixed order control design
International Journal of Electrical Power and Energy Systems, 2019 Abstract Yunnan Grid, a hydro-dominated system, has experienced many times ultra-low frequency oscillations (ULFO) since the grid is connected to the China Southern Grid via DC ties in 2016. The root cause of the oscillation phenomena is investigated in this work.
Chongxi Jiang +2 more
exaly +2 more sources
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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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
openaire +1 more source
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
doaj +1 more source
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
doaj +1 more source