Results 61 to 70 of about 7,321,916 (189)

Zero‐Current Switching Based Model Predictive Control of a Double‐Extended Overlapped Alternate Arm Converter Used in the VSC–HVDC System

High Voltage, EarlyView.
ABSTRACT The alternate arm converter (AAC) is one of the most efficient multilevel topologies based on voltage source converters (VSCs), which has recently gained attention in various applications, particularly in high voltage direct current (HVDC) systems.
Ehsan Akbari, Milad Samady Shadlu
wiley   +1 more source

High-frequency oscillations in a power transformer

, 2001
Power transformers are widely used as step-up or step-down devices and they can offer galvanic isolation between the input of the power supply and the output.
Ranstad, P, Demetriades, Georgios,, Manias, S, Manias, S. N.,, Dernetriades, G, Ranstad, Per,   +5 more
core   +1 more source

Comprehensive Design and Experimental Validation of 30 kV Ultra‐Fast Flexible Controllable Arresters for HVDC Systems

High Voltage, EarlyView.
ABSTRACT To effectively suppress transient overvoltages in HVDC systems, the design and experimental validation of a multi‐module series controllable arrester are presented. The voltage‐limiting performance, series voltage equalisation capability, and robustness under fault conditions in high‐voltage scenarios require further research.
Tai Yang, Xiangyu Zhang, Sihang Wu, Lei Qi, Xiang Cui   +4 more
wiley   +1 more source

Study on the Power‐Frequency Arc Extinction Characteristics of Semi‐Closed Short‐Gap Device

High Voltage, EarlyView.
ABSTRACT Multi‐chamber arc‐extinguishing devices have a simple structure and excellent arc‐extinguishing performance; thus, they have attracted considerable attention as lightning protection devices. However, the structural parameters of different models of the aforementioned devices vary, leading to inconsistent protection levels; therefore, the arc ...
Yeqiang Deng, Caiwei Pan, Jintian Chen, Yu Wang, Lei Lan   +4 more
wiley   +1 more source

The Lightning Protection Assessment of Distribution Lines with Considering Frequency Grounding System [PDF]

Iranian Journal of Electrical and Electronic Engineering
Ensuring the protection of all components within power systems from lightning-induced overvoltage is crucial. The issue of power interruptions caused by both direct and indirect lightning strikes (LS) presents significant challenges in the electrical ...
Aida Gholami, Masume Khodsuz, Valiollah Mashayekhi   +2 more
doaj  

Research Progress in Treeing Phenomena of Polypropylene Insulation Materials

High Voltage, EarlyView.
ABSTRACT Polypropylene (PP) is increasingly utilised in high‐voltage systems due to its superior electrical and thermal properties. However, electrical treeing poses a significant threat to its long‐term reliability, potentially leading to insulation failure.
Boxue Du, Heyu Wang, Zhonglei Li
wiley   +1 more source

Design of Zero Overvoltage Switching tailored power electronics

25102517Zero Overvoltage Switching (ZOS) can be used for clean switching transitions without overvoltage oscillations and unlimited switching speed, leading to the elimination of switching losses.
März, Martin, Matlok, Stefan, Schmied, Nico   +2 more
core   +1 more source

Machine Learning‐Assisted Development in Insulating Materials for High Voltage Applications

High Voltage, EarlyView.
ABSTRACT The advancement of power systems imposes increasingly stringent performance requirements on insulating materials, making the development of high‐performance insulating materials a critical challenge in the field of electrical engineering. Traditional material development relies heavily on empirical trial‐and‐error approaches, which are time ...
Yichen Ran, Yi Wang, Changheng Li, Jingyu Deng, Jian Wang, Haochen Zuo, Chen Zhao, Qian Wang, Yi Li, Song Xiao, Zhengyong Huang, Chao Wu, Zhonghui Shen, Kunming Shi, Fei Liu, Jie Chen, Jian Li, Xingyi Huang   +17 more
wiley   +1 more source

Overvoltage Elimination via Distributed Backstepping-Controlled Converters in Near-Zero-Energy Buildings Under Excess Solar Power to Improve Distribution Network Reliability

Energies
This work uses battery-coupled power electronic converter systems and distributed backstepping controllers to improve the reliability of electrical distribution networks.
J. Dionísio Barros, Luis Rocha, A. Moisés, J. Fernando Silva   +3 more
doaj   +1 more source

Load Rejection Overvoltage Suppression and Parameter Design Method of UHV AC Transmission Line

UHV (ultra-high voltage) by instant AC transmission system is accompanied by huge reactive power transmission. When the load drops sharply, it is easy to produce serious power frequency overvoltage, which is also defined as load rejection overvoltage ...
Wang Ma, Yixing Ding, Rusi Chen, Yingge Wang, Dian Xu, Haiguang Liu, Guanqun Sun   +6 more
core   +1 more source