Results 51 to 60 of about 329 (178)

Surface Flashover in 50 Years: III. Extreme Environments and Industrial Challenges

High Voltage, Volume 11, Issue 1, Page 100-142, February 2026.
ABSTRACT Modern high‐voltage electrical equipment operates in complex environments where surface conditions are subjected to multifaceted influences from electric fields, thermal gradients, contaminants, irradiation and other extreme environmental factors.
Zhen Li, Heng Zhang, He Gao, Ji Liu, Yoshimichi Ohki, George Chen, Shengtao Li   +6 more
wiley   +1 more source

A Hybrid Ultra‐High Voltage DC Transformer With Digital Twin‐Driven Operation and Control

Digital Twins and Applications, Volume 3, Issue 1, January/December 2026.
This study introduces a digital twin‐driven hybrid ultra‐high‐voltage DC transformer (UHVDCT) that combines high‐capacity LCCs with low‐capacity MMCs at the UHV side. This innovative topology reduces MMC requirements by 32.9% while ensuring stable power flow and dynamic reactive balance through real‐time virtual‐physical synchronization.
Ling Xu, Le Zhao, Xiaohu Zhang, Hanlin Guo, Jie Fang, Zheren Zhang, Zheng Xu   +6 more
wiley   +1 more source

Relaxed Unbalanced Three‐Phase OPF for Operating Envelopes in LV Distribution Grids and Influence of Grid Topology

IET Generation, Transmission &Distribution, Volume 20, Issue 1, January/December 2026.
This work introduces a relaxed unbalanced three‐phase optimal power flow framework for computing maximum day‐ahead operational envelopes in LV networks. Validation on the IEEE EU LV Testfeeder and 49 real feeders in Brussels demonstrates 7%–10% flexibility gains over fair methods, while a feeder typology analysis highlights the influence of topological
Lionel Delchambre, Patrick Hendrick, Pierre Henneaux   +2 more
wiley   +1 more source

When the Extreme Events Hit – Rethinking Power System Resilience Through Meteorology, AI, Data Centers, and Beyond

IET Generation, Transmission &Distribution, Volume 20, Issue 1, January/December 2026.
Low‐probability but high‐impact events pose growing risks to power system security, particularly in renewable‐rich and highly digitalised electricity systems, affecting generation, networks, loads, and cyber‐communication layers. This paper reviews power system resilience issues and potentials, highlighting the role of meteorological factors, advanced ...
Jin Zhao, Xi Wang, Xuzhe Song, Yang Shen
wiley   +1 more source

Experimental study of polymeric cable insulation under DC-superimposed long temporary overvoltage and lightning impulse voltage stress

Materials Research Express
Fault events in high-voltage direct current (DC) cable systems can generate DC-superimposed long temporary overvoltages (DC-LTOVs), same-polarity impulses that create stress conditions different from those in conventional superimposed lightning impulse ...
Robert Gerlach, Till Scholz, Willem Leterme, Bastian Soppe, Tanumay Karmokar, Isabella Nett, Dominik Häring   +6 more
doaj   +1 more source

Modular Fault‐Limiting and Ride‐Through Coordination for Cost‐Effective Protection of LVDC Distribution Networks

IET Generation, Transmission &Distribution, Volume 20, Issue 1, January/December 2026.
This paper proposes a modular fault‐limiting strategy that integrates multi‐port modules with DC circuit breakers to enhance system regulation. This coordination enables the use of cost‐effective mechanical breakers while significantly improving the fault‐ride‐through capabilities of the distribution network.
Xiaoyong Cao, Jiaming Weng, Dong Liu, Fei Chen, Gaoming Li, Weinian Ouyang, Pengfeng Lin   +6 more
wiley   +1 more source

Modelling of Metal Oxide Surge Arresters in Simulation Software DYNAST

, 2020
This paper describes the possibilities for mathematical modelling of gap-less surge arresters in simulation software DYNAST. This tool does not belong to standard modelling softwares in the field of electric power engineering.
Jan Veleba, Vladislav Síťař, Veleba, Jan, Síťař, Vladislav   +3 more
core   +1 more source

Recovery Control Strategies and Overcurrent Suppression for Bipolar Hybrid Cascaded MTDC Systems Under DC Faults

IET Generation, Transmission &Distribution, Volume 20, Issue 1, January/December 2026.
The paper explains the issue of managing and recovering DC faults in bipolar hybrid cascaded MTDC systems, the combination of LCCs to achieve power density and MMCs to provide flexible control in long‐distance power transmission, and the integration of large‐scale renewable energy sources. The paper examines fault behaviours in the LCC section, LCC‐MMC
Muhammad Asim Mond, Zhou Li, Wenwen Mei
wiley   +1 more source

AC fault ride-through control strategy of MMC-UHVDC system with hierarchical connection mode

Frontiers in Energy Research
The ultra-high voltage direct current (UHVDC) transmission composed of modular multilevel converters (MMC) is an important technology for large-scale centralized transmission of renewable energy.
Mingli Ping, Mingli Ping, Chong Niu, Xinhe Liu, Meijuan Yang, Xianwei Wang   +5 more
doaj   +1 more source

A CASE STUDY OF OVERVOLTAGE PROTECTION OF A MICROWAVE REPEATER STATION

, 2003
Ever since inception, the electric power and communication systems are exposed to dangerous overvoltage surges starting from lightning to service frequency temporary overvoltage waves with disastrous consequences.
Valsalal, P., Udayakumar, K.
core