Results 31 to 40 of about 6,200,319 (299)

A Comparative Analysis of Prominent Virtual Synchronous Generator Strategies Under Different Network Conditions

IEEE Open Access Journal of Power and Energy
The virtual synchronous generator (VSG) is the most widely used grid-forming inverter (GFMI) control technique. The VSG can provide enhanced ancillary services and improved dynamic response compared to conventional synchronous generators and grid ...
Chalitha Liyanage, Inam Nutkani, Lasantha Meegahapola   +2 more
doaj   +1 more source

An overview of the optically detected magnetic-state-selected cesium beam clock

Frontiers in Physics, 2022
Among all kinds of compact cesium beam clocks, the optically detected magnetic-state-selected cesium beam clock (OMCC) combines the advantages of the magnetic state selecting scheme and fluorescence detecting method.
Sifei Chen, Chang Liu, Lifeng Fan, Chen Liu, Yuanhao Li, Shaohang Xu, Chaojie Li, Yanhui Wang   +7 more
doaj   +1 more source

An Online Estimation Method for the Equivalent Inertia Time Constant of Power Equipment Based on Node Power Flow Equations

Energies
As renewable energy integration scales up, power systems increasingly depend on sources interfaced through power electronic converters, which lack rotating mass and substantially diminish system inertia.
Zhenghui Zhao, Xianan Wang, Jinhui Sun, Yubo Sun, Qian Zhang, Yang Wang   +5 more
doaj   +1 more source

Fast frequency response for effective frequency control in power systems with low inertia

The Journal of Engineering, 2019
The increasing penetration of renewable generation has led to the decrease of power systems’ overall inertia, which introduces significant challenges to frequency stability.
Qiteng Hong, Marcel Nedd, Seán Norris, Ibrahim Abdulhadi, Mazaher Karimi, Vladimir Terzija, Benjamin Marshall, Keith Bell, Campbell Booth   +8 more
doaj   +1 more source

Unit commitment of power systems considering system inertia constraints and uncertainties

IET Renewable Power Generation
Large‐scale integration of renewable energy into the power grid results in a lack of system inertia, posing challenges to the optimal operation and scheduling of systems considering frequency stability.
Yuxin Weng, Guangchao Geng, Quanyuan Jiang   +2 more
doaj   +1 more source

Research on Pressure Compensation for the Rubidium Atomic Clock Working in Atmospheric Environment

Chinese Journal of Magnetic Resonance
Vapor cell rubidium atomic clock is widely used in the fields of satellite navigation and communication with advantages including small size, light weight, low power and maintenance cost.
LI Junyao, LI Chengkang, ZHAO Feng, WANG Chen, WANG Fang, KANG Songbai, WANG Pengfei, MEI Ganghua, MING Gang   +8 more
doaj   +1 more source

Impact of Radiation Therapy on Physical and Psychosocial Health of Adolescents and Young Adults: A Joint Report From the Children's Oncology Group AYA and Radiation Oncology Committees

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Rates of cancer among adolescents and young adults (AYA), age 15–39 years, are increasing. Consequently, radiation oncologists are treating more AYAs who have diagnoses spanning both pediatric and adult practices. Compared to pediatric and older adult patients, AYAs face a unique set of challenges.
Hesham Elhalawani, Rachel K. Peterson, Avani D. Rao, Laurie J. McKenzie, Ahmed Magdy Elmotayam, Leslie Chang, Michael Roth, Susan L. McGovern   +7 more
wiley   +1 more source

Frequency dynamics during high CCGT and wind penetrations [PDF]

, 2011
Presented at AUPEC 2011, Australasian Universities Power Engineering Conference, Brisbane, Australia, 25 - 28 September 2011Frequency stability is the paramount concern for secure and reliable operation of a power system. High wind penetration levels are
Flynn, Damian, Meegahapola, Lasantha
core   +1 more source

Neural Network-Based Coordinated Virtual Inertia Allocation Method for Multi-Region Distribution Systems

Applied Sciences
Virtual inertia is a measure of the capability of distributed sources and loads within power supply units to resist system frequency variations through additional control strategies applied to converters.
Heng Liu, Jingtao Zhao, Zhi Wu, Shu Zheng   +3 more
doaj   +1 more source

Developed Transfer Function Allows Hydro Generators to Enter the Full Range of Ancillary Services Market

Energies, 2022
As the number of available renewable energy sources has increased annually, there has been a corresponding rise in the levels of pollution created by traditional electricity generation, ultimately contributing to breaking down the stability of the ...
Paulius Cicėnas, Virginijus Radziukynas
doaj   +1 more source