Results 101 to 110 of about 733,401 (250)

Voltage sags mitigation techniques analysis [PDF]

, 2007
For some decades, power quality did not cause any problem, because it had no effect on most of the loads connected to the electric distribution system. When an induction motor is subjected to voltage sag, the motor still operates but with a lower output ...
Saudin, Norshafinash
core  

Behavior of synchronous machines subjected to voltage sags of type A, B and E

, 2005
Voltage sags and voltage interruptions are huge power quality problems for many industries. Voltage sags cause apart from eventual tripping, large torque peaks, which may cause damage to the shaft or equipment connected to the shaft.
Sadarangani, Chandur,, Carlsson, F.
core   +1 more source

Microvascular Abnormalities in Adolescents With Anorexia Nervosa: Nailfold Video Capillaroscopic Evidence at Acute and Remission States

European Eating Disorders Review, EarlyView.
ABSTRACT Objective Chronic malnutrition, hypothermia, and hormonal imbalance in anorexia nervosa (AN) may impair capillary structure and perfusion. This study aimed to describe the nailfold videocapillaroscopy (NVC) findings in adolescents with AN and atypical AN (AAN), to assess their association with Raynaud's phenomenon (RP), and evaluate ...
Muserref Kasap‐Cuceoglu, Melis Pehlivanturk‐Kizilkan, Erdal Sag, Seher Sener, Zeynep Balik, Sinem Akgul, Orhan Derman, Yelda Bilginer, Nuray Kanbur, Seza Özen   +9 more
wiley   +1 more source

Techno‐Economic and Quasi‐Dynamic Load Flow Analysis of a Hybrid Renewable Microgrid for Coastal Industrial Loads

Energy Science &Engineering, EarlyView.
A hybrid PV–wind grid‐connected microgrid for Mongla Port is optimized using HOMER Pro and validated via DIgSILENT quasi‐dynamic load flow. The system achieves a low cost of energy (0.0341 USD/kWh), 70.9% renewable penetration, improved voltage stability, and significant emission reduction, demonstrating a reliable and cost‐effective solution for ...
Md. Behesty Hasan Sagor, Md Abdus Samad Kamal, Md. Feroz Ali, Md. Mahedi Hasan, Fahad Saleh Al‐Ismail, Md Shafiul Alam, Mohammad Ali   +6 more
wiley   +1 more source

Design of a Multi‐Complex Disturbance Generator Using Virtual Instrumentation for Power Quality Monitoring Research

Energy Science &Engineering, EarlyView.
A real‐time power quality disturbance generator is developed using virtual instrumentation based on LabVIEW and NI MyDAQ. The system generates IEEE‐standard PQ events with controllable noise and harmonics. Measurement uncertainty analysis confirms its reliability for realistic testing of Power Quality Disturbance detection and classification algorithms.
Abdullah Saud, Adil Usman, Muhammad Umar Khan, Sumair Aziz, Muhammad Faisal Nadeem Khan, Muhammad Akmal   +5 more
wiley   +1 more source

Research on Voltage Prediction Using LSTM Neural Networks and Dynamic Voltage Restorers Based on Novel Sliding Mode Variable Structure Control

Energies
To address the issue of uncertainty in the occurrence time of voltage sags in power grids, which affects power quality, a voltage state prediction method based on LSTM neural networks is proposed for predicting voltage states.
Jian Xue, Jingran Ma, Xingyi Ma, Lei Zhang, Jing Bai   +4 more
doaj   +1 more source

Battery Degradation Reduction in Flywheel–Battery Hybrid Energy Storage Using SSA‐Optimized Fuzzy‐PI Control

Energy Science &Engineering, EarlyView.
SSA‐optimized fuzzy‐PI control reduces battery stress in flywheel–battery hybrid energy storage systems by shifting transient power fluctuations to the flywheel. The strategy decreases ampere‐hour throughput by 46.1% and rainflow damage by 71% while maintaining stable DC‐bus regulation.
ZiFen Han, Xiping Ma, He Sheng, Qibin Zhu, Ke Wang, Chenyu Wu   +5 more
wiley   +1 more source

Responsive demand to mitigate slow recovery voltage sags

, 2011
It is expected that in the future, customers will play a much more active role in modern power distribution systems. Instead of being passive agents, customers will be encouraged to participate in many other functions, such as frequency and voltage ...
Garcia-Valle, Rodrigo, Xu, Z, Rodrigo Garcia-Valle, Østergaard, Jacob, Luiz Carlos Pereira da Silva, da Silva, Luiz Carlos Pereira, Garcia-Valle, R, Xu, Zhao, Pereira da Silva, LC, da Silva, LCP, Zhao Xu, Ostergaard, J, Jacob Østergaard   +12 more
core   +1 more source

Post‐Stimulation Hydraulic Response and Productivity Constraints of a Low‐Productivity Carbonate Geothermal Well in the Small Intramontane Basin, Beijing Piedmont, North China

Energy Science &Engineering, EarlyView.
Formed ~1.4 Ga, the carbonate reservoir of the Jixian System is a key geothermal reservoir in northern China. Differential basin–mountain evolution since the Cenozoic led to distinct reservoir‐forming histories; consequently, this same reservoir shows marked productivity contrasts between intramontane basins and the large rift Bohai Bay Basin ...
Chuanqing Zhu, Kefu Li, Wansen Yao, Wanqing Geng, Yonghui Huang, Shu Jiang, Nansheng Qiu   +6 more
wiley   +1 more source

Methodology for Relative Location of Voltage Sags Source using Voltage Measurements Only

, 2015
This paper presents a methodology for the relative location of voltage sags source based on voltage measurements only. Network faults are the most frequent disturbances in the electrical systems and in turn are the causes that generate most voltage sags.
Blanco Solano, Jairo, Petit Suárez, Johann F., Ordóñez Plata, Gabriel Ordóñez Plata   +2 more
core