Results 31 to 40 of about 12,974 (294)

GSO based optimization of steady state load shedding in power systems to mitigate blackout during generation contingencies

Ain Shams Engineering Journal, 2015
Load shedding is considered as a last alternative to avoid the cascaded tripping and blackout in power systems during generation contingencies. It is essential to optimize the amount of load to be shed in order to prevent excessive load shedding.
R. Mageshvaran, T. Jayabarathi
doaj   +1 more source

A Binary Archimedes Optimization Algorithm and Weighted Sum Method for UFLS in Islanded Distribution Systems Considering the Stability Index and Load Priority

Energies, 2023
This study proposes an under-frequency load-shedding (UFLS) scheme based on a binary Archimedes Optimization Algorithm (BAOA) and the Weighted Sum Method (WSM) to maintain the stability of an islanded distribution system. These methods consider stability
Hazwani Mohd Rosli, Hazlie Mokhlis, Nurulafiqah Nadzirah Mansor, Norazliani Md Sapari, Syahirah Abd Halim, Li Wang, Mohamad Fani Sulaima   +6 more
doaj   +1 more source

Optimal Under-Frequency Load Shedding Setting at Altai-Uliastai Regional Power System, Mongolia

Energies, 2020
The Altai-Uliastai regional power system (AURPS) is a regional power system radially interconnected to the power system of Mongolia. The 110 kV interconnection is exceptionally long and susceptible to frequent trips because of weather conditions.
Martha N. Acosta, Choidorj Adiyabazar, Francisco Gonzalez-Longatt, Manuel A. Andrade, José Rueda Torres, Ernesto Vazquez, Jesús Manuel Riquelme Santos   +6 more
doaj   +1 more source

Optimal Load Shedding Scheme Considering the Dynamic Frequency Response

Engineering Proceedings
A power system is never in a steady state due to continuous load variations, disturbances, maneuvers, and the operation of protection systems. A generation deficit causes a frequency drop in the system that must be controlled. If this frequency deviation
Carlos Lozada, Walter Vargas, Nelson Granda, Marlon Chamba   +3 more
doaj   +1 more source

Robust Unit Commitment for Minimizing Wind Spillage and Load Shedding With Optimal DPFC

Frontiers in Energy Research, 2022
The distributed power flow controller (DPFC) has a positive effect of UC problem on the network side based on its ability to manage capacity of power flow.
Xuedong Zhu, Jun Wu, Dichen Liu
doaj   +1 more source

Adaptive Load Shedding Analysis in Power Systems by Using Artificial Neural Network [PDF]

Journal of Intelligent Procedures in Electrical Technology, 2010
The stability of frequency and voltage is one of the basic principles in the power systems. One of the latest control measures for power system frequency control and stability is load shedding.
Rahmatolah Hooshmand, Majid Moazzami
doaj  

Reconstructing enzyme evolution by protein engineering

FEBS Letters, EarlyView.
Natural enzyme evolution can be retraced by protein engineering methods such as directed evolution, rational design, and ancestral sequence reconstruction. These approaches reveal how enzymes emerged from ligand‐binding scaffolds, developed varying substrate preferences, formed oligomeric complexes, adapted to environmental changes, and evolved novel ...
Lukas Drexler, Markus R. Busch, Reinhard Sterner   +2 more
wiley   +1 more source

Underfrequency Load Shedding: An Innovative Algorithm Based on Fuzzy Logic

Energies, 2020
In contemporary power systems, the load shedding schemes are typically based on disconnecting a pre-specified amount of load after the frequency drops below a predetermined value.
Robert Małkowski, Janusz Nieznański
doaj   +1 more source

Keratin 19 as a prognostic marker and contributing factor of metastasis and chemoresistance in high‐grade serous ovarian cancer

Molecular Oncology, EarlyView.
Keratin 19 (KRT19) is overexpressed in high‐grade serous ovarian cancer with high levels of Kallikrein‐related peptidases (KLK) 4–7 and is associated with poor survival. In vivo analyses demonstrate that elevated KRT19 increases peritoneal tumour burden.
Sophia Bielesch, Isabel Vogel, Sina Nokodian, Johanna Moeller, Antonia Blechschmidt, Vicky Hecht, Vanessa Kuentzel, Katharina Thiedig, Melissa Schwab, Oliver Schilling, Holger Bronger, Marion Kiechle, Viktor Magdolen, Tobias Dreyer   +13 more
wiley   +1 more source

An optimal dynamic underfrequency load shedding scheme [PDF]

, 2011
Electric power system network is highly sensitive to the supply and demand of power at generation as well as at user level. Erratic power demand under prevailing generation conditions may cause decay in power system frequency that can lead power system ...
Soomro, Dur Muhammad
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