Results 31 to 40 of about 235 (135)

On the Relationship Between Geomagnetically Induced Currents and Geomagnetic Field Variations—Illustrated With Case Studies of Pipeline and Power Systems in Regions With Different Conductivity Structures

Space Weather, Volume 24, Issue 7, July 2026.
Abstract During space weather events, geomagnetic field variations produce geoelectric fields (GEFs) that drive geomagnetically induced currents (GIC), which may affect operation of power systems, pipelines, railway signaling, and submarine cables. It is often assumed that GEFs and GICs are proportional to the rate of change of the magnetic field, ∂B ...
S. Chakraborty, D. H. Boteler
wiley   +1 more source

Design and Development of a 36-Pulse AC-DC Converter for Vector Controlled Induction Motor Drive [PDF]

, 2007
In this paper, an autotransformer based 36-pulse AC-DC converter fed vector controlled induction motor drives (VCIMD's) is presented for reduction of harmonic-currents.
Singh, Bhim, Sanjay Gairola, Bhim Singh, Gairola, Sanjay   +3 more
core   +1 more source

Contrasting Space Weather Drivers of Two Geomagnetically Induced Current Events in Alberta, Canada During the May 2024 Superstorm

Space Weather, Volume 24, Issue 7, July 2026.
Abstract Strong geomagnetic disturbances (GMDs) caused by intense space storms induce geomagnetically induced currents (GICs) in the Earth and within long conductive infrastructure, potentially posing risks to electricity transmission systems. Here, we investigate the solar wind conditions and magnetospheric processes responsible for two significant ...
Hannah G. Parry, Darcy R. Cordell, Sneha S. Babu, Ryan MacMullin, Ian R. Mann   +4 more
wiley   +1 more source

Multipulse improved-power-quality AC–DC convertors for vector-controlled induction-motor drives [PDF]

, 2006
The paper deals with polygon autotransformer-based 12-pulse and 18-pulse AC-DC convertors feeding vector-controlled induction-motor drives (VCIMDs) for improving power quality at the point of common coupling (PCC).
Singh, B., Garg, V., Bhuvaneswari, G.
core   +1 more source

Review of Catenary Icing on High‐Speed Railways: Characteristics, Impact and Countermeasures

High Voltage, Volume 11, Issue 3, Page 601-619, June 2026.
ABSTRACT The pantograph–catenary system (PCS) is the only path for electrified railway trains to acquire energy. Catenary icing during winter is a common natural phenomenon, which usually leads to the deterioration of the current quality and severely affects the operational safety of trains.
Zheng Li, Guizao Huang, Zhijin Zhang, Yang Liu, Guoqiang Gao, Guolin Yang, Xi Yang, Guangning Wu   +7 more
wiley   +1 more source

Construcción de un autotransformador trifásico con voltaje de salida variable [PDF]

, 2021
Se construyó un autotransformador trifásico con voltaje de salida variable para el Laboratorio de Máquinas Eléctricas de la Escuela Politécnica Nacional. El estudio para la selección de cada uno de los componentes del autotransformador se realiza en base
Villacis Carpio, Edwin Rafael
core  

GIC‐Related Observations During the May 2024 Geomagnetic Storm in the United States

Space Weather, Volume 24, Issue 5, May 2026.
Abstract The May 2024 geomagnetic storm was one of the most severe in the past 20 years. Understanding how large geomagnetic disturbances (GMDs) impact geomagnetically induced currents (GICs) within electrical power grid networks is key to ensuring their resilience.
L. A. Wilkerson, R. S. Weigel, D. Thomas, D. Bor, E. J. Oughton, C. T. Gaunt, C. C. Balch, M. J. Wiltberger, A. Pulkkinen   +8 more
wiley   +1 more source

24-pulse AC-DC converter for power quality improvement in vector controlled induction motor drives [PDF]

, 2006
This article deals with autotransformer based multipulse AC-DC converters feeding vector controlled induction motor drives (VCIMDs) for improving power quality at the point of common coupling (PCC).
Garg, Vipin, Singh, Bhim, Bhuvaneswari, G.   +2 more
core   +1 more source

Eighteen-pulse AC-DC converter for harmonic mitigation in vector controlled induction motor drives [PDF]

, 2005
This paper presents a novel autotransformer based eighteen-pulse ac-dc converter with reduced kVA rating, feeding vector controlled induction motor drives (VCIMD's) for power quality improvement at the point of common coupling (PCC).
Singh, B., Garg, V., Bhuvaneswari, G.
core   +1 more source

Improved Operational Flexibility of the M2AC for Direct AC/AC Conversion

IEEE Open Journal of Power Electronics
The modular multilevel ac/ac converter (M2AC) is a recently proposed partial power processing topology for direct ac/ac conversion that can adjust voltage magnitudes and phase angles in single-frequency ac power systems, analogous to a power electronic ...
Anjana Wijesekera, Gregory J. Kish
doaj   +1 more source