Results 11 to 20 of about 84,501 (299)

Householder-based Prony Method for Identification of Low-frequency Oscillation in Power System [PDF]

E3S Web of Conferences, 2019
In this paper, the Prony analysis tool with the software used in the actual operation has a large error. The improved Prony method is used to identify the low-frequency oscillation mode of the power system. The traditional Prony algorithm has the problem
Zhang Simin, Liu Guangye, Li Yaxin, Yao Jiangang   +3 more
doaj   +2 more sources

Improvement of the low frequency oscillation model for Hall thrusters

AIP Advances, 2016
The low frequency oscillation of the discharge current in Hall thrusters is a major aspect of these devices that requires further study. While the existing model captures the ionization mechanism of the low frequency oscillation, it unfortunately fails ...
Chunsheng Wang, Huashan Wang
doaj   +2 more sources

Online Evaluation Method for Low Frequency Oscillation Stability in a Power System Based on Improved XGboost

Energies, 2018
Low frequency oscillation in an interconnected power system is becoming an increasingly serious problem. It is of great practical significance to make online evaluation of actual power grid’s stability. To evaluate the stability of the power system
Wenping Hu, Jifeng Liang, Yitao Jin, Fuzhang Wu, Xiaowei Wang, Ersong Chen   +5 more
doaj   +2 more sources

Cause Analysis and Suppression Strategy of Power System Low-Frequency Oscillation Based on Recording Curves

Zhongguo dianli, 2021
How to swiftly determine the cause of the power system low-frequency oscillation and suppress it effectively is always a subject of great concern. A novel integrated solution is proposed to analyze and suppress the power system low-frequency oscillation ...
Risheng FANG, Yaodong LIN, Zhenhua XU, Ting HUANG, Daoshan HUANG, Wei JIANG, Jikeng LIN, Jian ZHANG   +7 more
doaj   +2 more sources

An Additional Damping Control Strategy for Grid-Forming Energy Storage to Address Low-Frequency Oscillation

Energies
Grid-forming (GFM) energy storage can be utilized as a backup power source for the power grid to ensure the security of the power grid. GFM energy storage can also enhance the strength of the power grid and improve its stability.
Chi Tian, Jianyuan Xu, Xin Lin, Gaole Yu, Weidong Chen   +4 more
doaj   +2 more sources

The low-frequency BOLD signal oscillation response in the insular associated to immediate analgesia of ankle acupuncture in patients with chronic low back pain

Journal of Pain Research, 2019
Anfeng Xiang,1,* Yang Yu,2,* Xize Jia,3,4 Huibin Ma,5,6 Hui Liu,1 Yu Zhang,1 Jun Rong,7,* Sheng Liu1,* 1School of Acupuncture-Moxibustion and Tuina, Shanghai University of Traditional Chinese Medicine, Shanghai, China; 2Department of Psychiatry, the ...
Xiang A, Yu Y, Jia X, Ma H, Liu H, Zhang Y, Rong J, Liu S   +7 more
doaj   +1 more source

Sub-Seasonal Prediction of Sea-Gale Processes in the Yangtze River Estuary of China

Atmosphere, 2023
The sea-gale process (SGP) is a significant and disastrous weather event for the marine industry. However, the sub-seasonal predictability of SGP remains unclear.
Xiao Xie, Ping Liang, Qiwen Qian
doaj   +1 more source

Control Strategies for Suppressing Frequency Oscillation of Doubly-Fed Wind Farms Connected to Grid

Shanghai Jiaotong Daxue xuebao, 2022
Aimed at the problem of low-frequency oscillations caused by cross-region power transmissioin of large-scale wind farms, a single neuron adaptive proportion integration differentiation (PID) additional damping control strategy for low-frequency ...
LIU Xinyu, LU Xinyan, ZENG Long, HAO Zhenghang, ZHAO Qifang, LI Xianwei, HAO Tongmeng
doaj   +1 more source

A Low-Frequency Oscillator [PDF]

Review of Scientific Instruments, 1953
A low-frequency simple-harmonic oscillator, employing a relatively new method of approach, is described. An electronic analog computer of the differential analyzer type is used to solve the differential equation of a mass-spring system. Three dc operational amplifiers perform the computation and a sinusoidal output is obtained as the solution of the ...
Howe, Robert Milton, Leite, Richard Joseph   +1 more
openaire   +2 more sources

A synthetic low-frequency mammalian oscillator [PDF]

Nucleic Acids Research, 2010
Circadian clocks have long been known to be essential for the maintenance of physiological and behavioral processes in a variety of organisms ranging from plants to humans. Dysfunctions that subvert gene expression of oscillatory circadian-clock components may result in severe pathologies, including tumors and metabolic disorders.
Tigges Marcel, Dénervaud Nicolas, Greber David, Stelling Joerg, Fussenegger Martin   +4 more
openaire   +4 more sources