Results 21 to 30 of about 2,595,447 (316)

Very Short-Term Power System Frequency Forecasting

IEEE Access, 2020
Power system frequency plays a pivotal role in ensuring the security, adequacy, and integrity of a power system. While some frequency response services are automatically delivered to maintain the frequency within the stipulated limits, certain cases may ...
Ogun Yurdakul, Fatih Eser, Fikret Sivrikaya, Sahin Albayrak   +3 more
doaj   +1 more source

A Hierarchical Cooperative Frequency Regulation Control Strategy of Wind-Storage-Load in a Microgrid Based on Model Prediction

Energies, 2023
In order to give full play to the frequency regulation ability of multiple types of resources such as wind power, energy storage, and controllable load in a microgrid, this paper proposes a hierarchical cooperative frequency regulation control strategy ...
Yicong Wang, Chang Liu, Zhiwei Liu, Tingtao Wang, Fangchao Ke, Dongjun Yang, Dongyin Zhang, Shihong Miao   +7 more
doaj   +1 more source

Controller design for load frequency control: Shortcomings and benefits

, 2023
The controller is the key element of a control system to compare the controlled value to the desired value. From the comparison, if any deviation exists, the controller adjusts it.
Mishra, DK, Li, L, Hossain, MJ, Zhang, J
core   +1 more source

Frequency control of an island microgrid using reset control method in the presence of renewable sources and parametric uncertainty

Systems Science & Control Engineering, 2020
In recent years, several powerful control methods have been proposed. One of these methods is the reset control, simple nonlinear control technique very effective for plants subjected to fundamental design limitations, and this paper suggests its ...
Tohid Banki, Faramarz Faghihi, Soodabeh Soleymani   +2 more
doaj   +1 more source

An optical fibre-based frequency dissemination network for Australia

, 2011
An optical-fibre network is being planned for distribution of optical and microwave reference frequencies in Australia. This network would connect a number of research facilities and the National Measurement Institute (NMI), allowing long-range ...
Luiten, A., Orr, B., Wouters, M., Gray, M., He, Y., Shaddock, D., Hsu, M., Warrington, R., Aben, G., Baldwin, K.   +9 more
core   +1 more source

Friction and Wear Performances of Stainless Steel Archwires After Corrosion in Oral Care Products

Lubricants
To elucidate the corrosion mechanism of orthodontic archwire in fluoride-containing environments, the friction and wear behavior of archwires following corrosion in fluoride-containing oral care products was investigated.
Cong Zhang, Minghui Hao, Shiqi Cheng, Pengfei Wang   +3 more
doaj   +1 more source

Modelling, Implementation, and Assessment of Virtual Synchronous Generator in Power Systems

Journal of Modern Power Systems and Clean Energy, 2020
As more and more power electronic based generation units are integrated into power systems, the stable operation of power systems has been challenged due to the lack of system inertia. In order to solve this issue, the virtual synchronous generator (VSG),
Meng Chen, Dao Zhou, Frede Blaabjerg
doaj   +1 more source

Current limitations of cryogenic microwave oscillator frequency stability

, 2014
Technical paperCryogenic microwave oscillators built upon sapphire loaded cavity resonators exhibit excellent levels of frequency stability. Here we present an overview of the current understanding of the various processes and noise sources that limit ...
Parker, S., John G. Hartnett, Stephen R. Parker, Ivanov, E., Tobar, M., Michael E. Tobar, Hartnett, J., Eugene N. Ivanov   +7 more
core   +1 more source

Frequency Restoration Reserve Control Scheme with Participation of Industrial Loads [PDF]

, 2013
15.10.14 KB Ok to add accepted version. Re-published author updated accepted versionIn order to accommodate larger amounts of renewable energy resources, whose power output is inherently unpredictable, there is an increasing need for frequency control ...
Davide Fabozzi, Nina F. Thornhill, Thornhill, NF, Fabozzi, D, Pal, BC, Bikash C. Pal   +5 more
core   +1 more source

Low-Friction and Corrosion-Resistant Orthodontic Stainless Steel Archwires with Functional Carbon Films

Nanomaterials
To mitigate the adverse effects of immersion in fluoride-containing solutions on the surface corrosion of orthodontic stainless steel archwires, carbon films were fabricated on these archwires under various deposition times and substrate bias voltages ...
Pengfei Wang, Minghui Hao, Shiqi Cheng
doaj   +1 more source