Results 41 to 50 of about 235 (135)

The New Geomagnetic Monitoring Network in China: Insights From the 2024 Mother's Day Superstorm

Space Weather, Volume 24, Issue 2, February 2026.
Abstract China has established a ground‐based network system, that is the Chinese Meridian Project (CMP), to continuously monitor the geomagnetic field. The superstorm in May 2024 was analyzed using the CMP data. The negative peak of the horizontal geomagnetic field (Bh) during the storm main phase at different CMP stations varied between −449 nT and ...
Jing Wang, Yue Yan, Bingxian Luo, Chunming Liu, Hui Li, Jiaojiao Zhang, Yanhong Chen, Chen Wu, Zihan Wu, Ziqian Liu, Xin Wang, Ercha Aa, Xianzhi Ao   +12 more
wiley   +1 more source

Bubbling Inception Temperature in Power Transformers—Part 1: Comparative Study of Kraft Paper, Thermally Upgraded Kraft Paper, and Aramid Paper With Mineral Oil

IEEE Access
The bubbling inception temperature (BIT) of insulating materials used in transformers is critical for their performance and lifespan. This study, which represents the first part of a two-part series, provides a comparative analysis of the BIT for kraft ...
Ghada Gmati, Issouf Fofana, Patrick Picher, Fethi Meghnefi, Oscar Henry Arroyo-Fernandez, Djamal Rebaine, Youssouf Brahami, Yapi Marie Lucia Kouba   +7 more
doaj   +1 more source

Performance Improvement of PMSG‐Based Wind Energy Systems via Sensorless FS‐Predictive Current Control With MRAS and MPPT‐OTC Integration

IET Electric Power Applications, Volume 20, Issue 1, January/December 2026.
This paper proposes a hybrid sensorless control strategy for a permanent magnet synchronous generator (PMSG)‐based wind energy conversion system (WECS). The approach integrates finite‐set predictive current control (FS‐PCC), a model reference adaptive system (MRAS) estimator and an optimal torque control maximum power point tracking (MPPT‐OTC) method ...
Hicham Sayhi, Amor Bourek, Abdelkarim Ammar, Ali Teta, Ahmed Chennana, Abdelaziz Rabehi, Mohamed Benghanem, Takele Ferede Agajie   +7 more
wiley   +1 more source

Design and Experimental Verification of 20-Pulse AC–DC Converter for Retrofit Applications and Harmonic Mitigation [PDF]

, 2017
This paper presents the design and analysis of a polygon-connected autotransformer based 20-pulse AC–DC converter which supplies direct torque-controlled induction motor drives (DTCIMDs) in order to have better power quality conditions at the point of ...
Rohollah Abdollahi
core   +1 more source

Partial Discharge Pattern Recognition Based on Time‐Frequency Multi‐Scale Residual Attention Network

IET Science, Measurement &Technology, Volume 20, Issue 1, January/December 2026.
A time‐frequency multi‐scale residual attention network (TFMRAnet) was designed to analyze partial discharge (PD) signals. The network comprises an adaptive denoising network based on multi‐scale residual attention, a frequency‐domain recognition network, and a decision fusion module based on Dempster‐Shafer (D‐S) evidence theory.
Yunguang Gao, Haohua Jia, Zhipeng Lei, Wenjie Zhang, Junqiang He   +4 more
wiley   +1 more source

Estudio de presencia de humedad en el aceite dieléctrico del autotransformador de potencia utilizado en transmisión para estimar la vida útil remanente [PDF]

, 2022
El presente documento, se basa en el cálculo para estimar la vida útil remanente del autotransformador trifásico de potencia de la subestación Mulaló con una capacidad de 66,7 MVA, cuya relación de transformación es de 138 kV/ 69 kV /13.8 kV, cuya ...
Galeas Mendoza, Santiago Omar
core  

Enhancing Frequency Stability in a Real Power System for the Energy Transition: A Data‐Driven LFC/AGC Optimization Study of the El Bayadh, Algeria Grid

International Journal of Energy Research, Volume 2026, Issue 1, 2026.
The large‐scale integration of variable renewable energy sources (VRESs) challenges the frequency stability of modern power systems due to reduced inertia and increased power fluctuations. This study presents the first data‐driven dynamic model and optimization framework for the regional grid of El Bayadh, Algeria, a real‐world system facing high ...
Ali Abderrazak Tadjeddine, Hassane Dahbi, Ridha Ilyas Bendjillali, Iliace Arbaoui, Claire Gao   +4 more
wiley   +1 more source

An improved power-quality 30-pulse AC-DC for varying loads [PDF]

, 2007
This paper presents the design and analysis of a novel 30-pulse ac-dc converter for harmonic mitigation under varying loads. The proposed 30-pulse ac-dc converter is based on a polygon-connected autotransformer with reduced magnetics.
Garg, Vipin, Singh, Bhim, Bhuvaneswari, G.   +2 more
core   +1 more source

Analysis of fault current contributions from small‐scale single‐phase photovoltaic inverters and their impacts on the protection of electric power distribution systems

IET Generation, Transmission & Distribution
This paper presents an analysis of the fault current contributions of small‐scale single‐phase photovoltaic inverters under grid‐connected operation and their potential impact on the protection of distribution systems.
Lucas Rodrigues deAlmeida, Rodrigo Nobis da Costa Lima, José Rubens Macedo Junior   +2 more
doaj   +1 more source

A Novel High‐Gain Solar Power Converter for Next‐Generation Renewable Energy Applications

International Journal of Energy Research, Volume 2026, Issue 1, 2026.
This study presents a novel high‐gain solar power converter that integrates inductor coupling technology, designed for next‐generation renewable energy systems. The converter efficiently handles low input voltages (20–40 V) from solar panels. It operates at low duty cycles and boosts the output to 380 V direct current (DC), achieving a conversion ...
Hwa-Dong Liu, Xin-Wen Lin, Olubayo Babatunde   +2 more
wiley   +1 more source