Results 41 to 50 of about 179,951 (271)

Minimization of Active Power Loss Using Enhanced Particle Swarm Optimization

open access: yesMathematics, 2023
Identifying the weak buses in power system networks is crucial for planning and operation since most generators operate close to their operating limits, resulting in generator failures.
Samson Ademola Adegoke   +2 more
doaj   +1 more source

Intraoperative Collection of Ascitic Fluid With Intra‐ or Postoperative Reinfusion in Ovarian Cancer: Safety and Feasibility of a Roller Pumping Method

open access: yesTherapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Introduction Patients with ovarian cancer often present with massive ascites, leading to significant protein loss during surgical procedures. Although cell‐free concentrated ascites reinfusion therapy (CART) is used in palliative settings to mitigate protein loss, its application in intraoperative settings remains unexplored.
Yutaka Yoneoka   +7 more
wiley   +1 more source

STUDI EFEKTIFITAS INDIKATOR KESTABILAN TEGANGAN PADA MODEL DINAMIS SISTEM TENAGA LISTRIK [PDF]

open access: yes, 2006
TITe pape7- presents the effectiveness of voltage stability indices for dynamic povver system modelling study in providing information about the proximity of voltage IN] collapse in power system. Four simple stability indices as Voltage Instability
Nizam , Muhammad
core  

A Generalized Index for Static Voltage Stability of Unbalanced Polyphase Power Systems including Th\'evenin Equivalents and Polynomial Models [PDF]

open access: yes, 2019
This paper proposes a Voltage Stability Index (VSI) suitable for unbalanced polyphase power systems. To this end, the grid is represented by a polyphase multiport network model (i.e., compound hybrid parameters), and the aggregate behavior of the devices
Kettner, Andreas Martin, Paolone, Mario
core   +2 more sources

Enabling Model-Based LTI for Large-Scale Power System Security Monitoring and Enhancement With Graph-Computing-Based Power Flow Calculation

open access: yesIEEE Access, 2019
The voltage stability is an essential security concern when a system is operating in peak load hours or subjected to an N-1 contingency. Among various voltage stability indices, Local Thevenin Index (LTI) has been a popular one, but mostly applied to the
Qingxin Shi   +6 more
doaj   +1 more source

Data‐driven look‐ahead voltage stability assessment of power system with correlated variables

open access: yesIET Generation, Transmission & Distribution, 2022
Probabilistic voltage stability assessment (VSA) of distribution systems has recently gained significant research attention due to the proliferation of renewable energy sources (RESs).
Saeed Nejadfard‐jahromi   +1 more
doaj   +1 more source

Reduction of operational restrictions of the transmission system in electrical systems through facts implementation

open access: yese-Prime: Advances in Electrical Engineering, Electronics and Energy, 2022
Operational constraints cause an increase in complexity, operating cost, and environmental and socioeconomic impact on electrical systems; operational constraints can be due to power flow, voltage, or frequency deviations.
M. Aybar-Mejía   +6 more
doaj   +1 more source

Voltage stability assessment for distrbuted generation in islanded microgrid system [PDF]

open access: yes, 2012
The increasing energy demands are stressing the generation and transmission capabilities of the power system. Distributed generation (DG), which generally located in distribution systems, has the ability to meet some of the growing energy demands ...
Hendi Gareh, Saleh Ali Ahmed
core  

Monitoring voltage collapse margin by measuring the area voltage across several transmission lines with synchrophasors

open access: yes, 2014
We consider the fast monitoring of voltage collapse margin using synchrophasor measurements at both ends of transmission lines that transfer power from two generators to two loads.
Dobson, Ian, Ramirez, Lina
core   +1 more source

Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM

open access: yesFEBS Letters, EarlyView.
Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley   +1 more source

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