Results 101 to 110 of about 31,165 (290)

Optimal Reactive Power Planning Using FACTS Devices for Voltage Stability Enhancement in Power Transmission Systems

Energy Science & Engineering
The increased demand for electricity has forced power systems to operate near their stability limits. Optimal reactive power planning (ORPP) can enhance voltage stability and provide much‐needed support for grid operation. Flexible AC transmission system
Rawan Abu Zeitawyeh, Ayman Faza
doaj   +1 more source

Optimal active and reactive power dispatch in the presence of wind farms using voltage indicators and metaheuristic methods [PDF]

E3S Web of Conferences
Wind power plants penetration into power grids has grown considerably due to the fact of being cheap and clean. As a result, many countries require that the wind turbines must be capable of offering ancillary services such as reactive power control and ...
Cherkaoui Nazha, Belfqih Abdelaziz, Hadjoudja Abdelkader   +2 more
doaj   +1 more source

A novel differential evolution algorithmic approach to transmission expansion planning

, 2009
This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.Nowadays modern electric power systems consist of large-scale and highly complex interconnected transmission systems, thus transmission expansion planning ...
Sum-Im, Thanathip
core  

Silicified Wood‐Inspired, High‐Strength Fire‐Resistant Chitin‐Based Aerogels for Sustainable High‐Temperature Thermal Insulation

Advanced Functional Materials, EarlyView.
Inspired by natural silicified wood, a biomimetic mineralized chitin‐derived aerogel is constructed. It can withstand 81 000 times its own weight, and its backside temperature is 130.4°C after exposure to ∼1300°C butane flame for 600 s, exhibiting high‐strength, fire‐resistance, and super thermal‐insulation properties.
Kai Xu, Qihang Lv, Lubin Liu, Zhezhe Zhou, Chentao Yan, Ao Qin, Jianting Ma, Shuhui Liang, Yue Xu, Min Hong, Bin Li, Pingan Song   +11 more
wiley   +1 more source

Multi-Objective Optimization of Reactive Power Supports

, 2008
In this paper, a new method of multi-objective optimization for assessment of investment decision on reactive power support in power systems is proposed.
Gavasheli, Otar, Le, Anh Tuan,
core  

Residual‐Lithium‐to‐LiF Conversion Enables a LiF–Fluorinated Carbon Interphase for Reconstruction‐Resistant Ni‐Rich Cathodes

Advanced Functional Materials, EarlyView.
A fluorine‐rich acrylate monomer (PFHEA) was solvent‐free applied to NCM90 and thermally decomposed under Ar to convert residual lithium into LiF and form a pre‐built LiF/fluorinated amorphous carbon (LiF/FC) interphase. The LiF/FC layer suppresses NiO rock‐salt reconstruction and microcrack propagation, lowers interfacial resistance, and improves Li ...
Pangyu Kim, Juyeon Han, Junhyeok Kim, Younghoon Kim, Eunha Seo, Dain Kim, Jeeyoung Yoo   +6 more
wiley   +1 more source

A comprehensive review of advancements and challenges in reactive power planning for microgrids

Energy Informatics
The effective management of reactive power plays a vital role in the operation of power systems, impacting voltage stability, power quality, and energy transmission efficiency.
Abdallah Mohammed, Eman Kamal Sakr, Maged Abo‑Adma, Rasha Elazab   +3 more
doaj   +1 more source

An application of CHA to concurrent short-term transmission expansion & reactive power planning

, 2011
In this paper a heuristic technique for solving simultaneous short-term transmission network expansion and reactive power planning problem (TEPRPP) via an AC model is presented.
Mahmoudabadi, A., M. Rashidinejad, Khorasani, H., Khorasani, H. [UNESP], Rahmani, M., M. Rahmani, A. Mahmoudabadi, Rahmani, M. [UNESP], Rashidinejad, M., M. Mohammadian, M. Zeinaddini Maymand, H. Khorasani, Zeinaddini Maymand, M., Mohammadian, M.   +13 more
core   +1 more source

Electrode and Microstructure Dependence of Oxygen Diffusion in Ferroelectric Hafnium Zirconium Oxide Thin Films

Advanced Functional Materials, EarlyView.
Significant nanoscale oxygen diffusion coefficient variations are measured in ferroelectric hafnium zirconium oxide films with grain boundaries and electrode interfaces exhibiting values 104 times larger than the grain cores. Overall coefficients are 10X larger for films prepared with metal nitride electrodes compared to refractory metals. New insights
Liron Shvilberg, Thomas W. Pfeifer, Chuanzhen Zhou, Yong Kyu Choi, Duk‐Hyun Choe, Patrick E. Hopkins, Jon F. Ihlefeld   +6 more
wiley   +1 more source

Coordinated static and dynamic reactive power planning against power system voltage stability related problems

, 2007
Power System, over the many years, has undergone dramatic revolution both in technological as well as structural aspects. With the ongoing growth of the electric utility industry, including deregulation in many countries; numerous changes are ...
Krishnan, Venkat
core   +1 more source