Results 21 to 30 of about 132,272 (225)

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

Study on Quantitative Evaluation Index of Power System Frequency Response Capability

Energies, 2022
Frequency stability is an important factor for the safety and stability of the power system operation. In a traditional power system, the operation stability is ensured by the inertia response, primary frequency modulation, and secondary frequency ...
Cheng Chi, Hai Zhao, Jiahang Han
doaj   +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

Two-stage frequency regulation for wind turbines with adaptive coefficients and optimized power trajectory

International Journal of Electrical Power & Energy Systems
Wind turbines support grid frequency by rotor decelerating and then accelerating, but the instant power imbalance caused by rotor speed recovery may lead to a secondary frequency drop.
Zhiting Zhou, Hui Li, Jie Zheng, Hongtao Tan, Xuewei Xiang, Ran Yao   +5 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

A multi-stage sequential load restoration method for under-frequency load shedding with electric vehicles participation

Energy Reports, 2023
As a low-cost and high-efficiency distributed energy storage resource, electric vehicles (EVs) play an increasingly prominent role in power system regulation.
Zhiqiang Luo, Hui Liu, Teyang Zhao, Houlin Pan, Yi Su, Huijie Li, Zhiyuan Sun   +6 more
doaj   +1 more source

Coordinated control of rotor kinetic energy and pitch angle for large‐scale doubly fed induction generators participating in system primary frequency regulation

IET Renewable Power Generation, 2021
This paper presents a control strategy of large‐scale wind‐thermal power joint primary frequency regulation. First, an integrated control strategy is established rotor kinetic energy control and pitch angle control for wind turbine generators ...
Peihong Yang, Bin He, Biao Wang, Xiaoling Dong, WenYing Liu, Jihong Zhang, ZhenKui Wu, Jing‐Xia Liu, Zhigang Qin   +8 more
doaj   +1 more source

Distributed Finite-Time Secondary Frequency and Voltage Restoration Control Scheme of an Islanded AC Microgrid

Energies, 2021
To solve the problems of frequency and voltage deviation caused by the droop control while meeting the requirements of rapid response, a distributed finite-time secondary control scheme is presented.
Junjie Ma, Xudong Wang, Siyan Zhang, Hanying Gao   +3 more
doaj   +1 more source

Hyperosmotic stress induces PARP1‐mediated HPF1‐dependent mono(ADP‐ribosyl)ation

FEBS Letters, EarlyView.
Sorbitol‐induced hyperosmotic stress rapidly induces reversible mono(ADP‐ribosyl)ation (MARylation) on PARP1 without the signs of genotoxic signaling. We show that PARP1 autoMARylation is HPF1 dependent and forms hydroxylamine‐resistant O‐glycosidic linkages.
Anna Georgina Kopasz, Mihály Mérey, Rebeka Vásárhelyi, Ramóna Pék, Victor Imburchia, László Henn, Adrián Kószó, Nicholas D. Lakin, Ivan Ahel, Sébastien Huet, Ágnes Czibula, Gyula Timinszky   +11 more
wiley   +1 more source