Results 11 to 20 of about 54,093 (284)

FLC-Based Ultra-Low-Frequency Oscillation Suppression Scheme for Interconnected Power Grids

Energies
The 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, Mingqun Liu, Junzhen Peng, Yuhong Wang, Yichen Zhou, Zongsheng Zheng, Shilin Gao, Jianquan Liao   +7 more
doaj   +3 more sources

A Novel Control Strategy for Hydraulic Turbines to Consider Both Primary Frequency Regulation and Ultra-Low Frequency Oscillation Suppression

Energies
In 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, Bangwei Tan, Wentao Zhang, Dongrong Jiang, Chao Yang, Yunhao Wen   +5 more
doaj   +4 more sources

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, Yang Yang 0002, Tao Zhou, Yonggang Li   +3 more
openaire   +3 more sources

Small-Signal Stability Analysis of Photovoltaic-Hydro Integrated Systems on Ultra-Low Frequency Oscillation

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, Xiangyu Wu, Gang Chen, Yin Xu   +3 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, Jinghao Zhou, Deqiang Gan   +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, Lehtonen, Matti, Kuivaniemi, Mikko, Haarla, Liisa   +3 more
openaire   +3 more sources

Suppression strategy of coupled oscillation and power anti‐regulation of variable speed pumped storage unit with full size converter

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, Yuhong Wang, Gang Chen, Lijie Ding, Jianquan Liao   +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, Geng Zhichen, Ai Dongping, Wei Wei, Li Ying, Li Gan, Jin Liming, Li Wenfeng, Tang Yong   +8 more
doaj   +1 more source

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, Gang Chen, Zhen Chen, Huabo Shi, Chang Liu, Yufei Teng   +5 more
doaj   +1 more source

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, Baohong Li, Jingbo Zhao, Tianqi Liu, Qin Jiang, Gang Chen   +5 more
doaj   +1 more source