Results 31 to 40 of about 132,148 (255)

Flexible Frequency Response Strategy with Smooth Rotor Speed Recovery of a DFIG-Based Wind Turbine [PDF]

, 2023
Grid frequency must be regulated in its nominal range to guarantee the stable operation of an electric power grid. Excessive grid frequency excursions result in load shedding, grid frequency instability, or even synchronous generator damage.
Jiejie Huang, Xiaocen Xue, Shun Sang
core   +1 more source

Effect of Lower Limb vs. Abdominal Compression on Mobility in Orthostatic Hypotension: A Single-Blinded, Randomized, Controlled, Cross-Over Pilot Study in Parkinson’s Disease

Journal of Parkinson’s Disease, 2022
Background: Orthostatic hypotension (OH) in Parkinson’s disease (PD) is frequent and associated with impairments in quality of life and reduced activities of daily living.
Steffen Paschen, Clint Hansen, Julius Welzel, Judith Albrecht, Arash Atrsaei, Kamiar Aminian, Kirsten E. Zeuner, Robbin Romijnders, Elke Warmerdam, Paul Peter Urban, Daniela Berg, Walter Maetzler   +11 more
doaj   +1 more source

Dynamic power-based temporary frequency support scheme for a wind farm

Frontiers in Energy Research, 2022
Doubly fed induction generators can participate in frequency support following a disturbance by releasing their rotational energies. However, when regaining the rotor speed, a secondary frequency dip (SFD) tends to produce a sudden output drop.
Jiahan You, Dan Xu, Jiangdong Cao
doaj   +1 more source

Fast Frequency Control Strategy for Direct Drive Wind Turbines Considering the Suppression of Secondary Frequency Drop in the Power Grid

Journal of Physics: Conference Series, 2023
Abstract Inertia and damping in the power system are important parameters in frequency regulation and oscillation suppression. Inertia will reduce the rate and amplitude of frequency changes after active power sudden changes. Damping in the system can effectively suppress low-frequency oscillations after grid disturbances.
openaire   +1 more source

Presentation1_Cooperative Synthetic Inertia Control for Wind Farms Considering Frequency Regulation Capability.pdf [PDF]

, 2021
To fully utilize the frequency regulation (FR) capability of wind turbines (WTs) and to avoid a secondary frequency drop caused by the rotor speed recovery, this paper firstly proposes an FR capability evaluation method for wind farms based on the ...
Yongping Wang (66268), Qiaoming Shi (11353635), Yu Lu (11575), Qiang Zou (172269), Qingwu Zhang (11353638), Hongqing Liu (11353641), Lei Liu (5074)   +6 more
core   +1 more source

Quantitative Frequency Security Assessment of Modern Power System Considering All the Three Indicators in Primary Frequency Response [PDF]

, 2023
The primary frequency response scale is deteriorating in the modern power system due to the high penetration of different power devices. Frequency security assessments are essential for the operation or stability-checking of the power system.
Fei Tang, Zhuo Liu, Yuhan Guo, Huipeng Deng, Junfeng Qi   +4 more
core   +1 more source

Cooperative Frequency Control for Autonomous AC Microgrids [PDF]

, 2015
Distributed secondary control strategies have been recently studied for frequency regulation in droop-based AC Microgrids. Unlike centralized secondary control, the distributed one might fail to provide frequency synchronization and proportional active ...
Quintero, Juan Carlos Vasquez; id_orcid, Guerrero, Josep M.; id_orcid, Nasirian, Vahidreza, Qobad Shafiee, Ali Davoudi, Juan C. Vasquez, Vahidreza Nasirian, Davoudi, Ali, Shafiee, Qobad, Josep M. Guerrero   +9 more
core   +1 more source

Equivalent Modeling and Comprehensive Evaluation of Inertia Emulation Control Strategy for DFIG Wind Turbine Generator

IEEE Access, 2019
With the increasing penetration of renewable energy in power grid, many inertia emulation control strategies have been proposed to provide extra support to the power grid in system disturbances. To explain the physical resemblance and relations among all
Haoshu Shao, Xu Cai, Dangsheng Zhou, Zheng Li, Dapeng Zheng, Yunfeng Cao, Yan Wang, Fangquan Rao   +7 more
doaj   +1 more source

Stepwise inertial intelligent control for wind power frequency support based on modified stacked denoising autoencoder

Energy Reports, 2022
Due to the large-scale popularization of renewable energy, the rotational inertia of modern power system is reduced, which increases the risk of power system failure and power outage when disturbance events occur.
Tao Zhou, Yalun Wang, Hao Quan, Teng Zhang   +3 more
doaj   +1 more source

Retuning high Q inductive power transfer systems at MHz frequencies: a switched capacitor design method incorporating COSS

IET Power Electronics, 2023
High Q coils are required by inductive power transfer (IPT) links to attain reasonable levels of power transfer especially for loosely coupled links such as those used for small, deeply implanted medical devices.
Rui Jin, Robert Gallichan, David Budgett, Simon Malpas, Daniel McCormick   +4 more
doaj   +1 more source