Results 41 to 50 of about 1,013 (174)

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  

Analysis on the fault characteristics of three-phase short-circuit for half-wavelength AC transmission lines

Global Energy Interconnection, 2018
Half-wavelength AC transmission (HWACT) is an ultra-long distance AC transmission technology, whose electrical distance is close to half-wavelength at the system power frequency. It is very important for the construction and operation of HWACT to analyze
Xuankun Song, Teng Feng, Liu Han, Travis M. Smith, Xinzhou Dong, Wenxuan Liu, Rui Zhang   +6 more
doaj   +1 more source

Lightning Overvoltage Response Modeling and Protection Design for Solid State Transformer

IEEE Access
The rapid development of the AI and ICT industry has driven massive data center construction. Compared to conventional LFT (line-frequency transformer)-isolated conversion system, SST-based uninterruptible power supply solution offers high efficiency ...
Jiatong Zhang, Jianxiong Yu, Jie Ming, Jiajie Duan, Chushan Li   +4 more
doaj   +1 more source

Analyses on an electronic voltage transformer's failure by its resonance with very fast transient overvoltage and suppression

High Voltage
As voltage measuring devices are widely used in the high voltage power system with a primary‐secondary‐fusion structure, electronic voltage transformers are directly connected to the primary conductor and would face much more serious electromagnetic ...
Houda Zhu, Qing Chen, Hongbin Li, Yue Tong, Linshan Han, Yang Jiao   +5 more
doaj   +1 more source

Overvoltage Suppression Strategy for VSG-Based DFIGs Under Commutation Failures of HVDC Transmission Systems

Energies
Virtual synchronous generator (VSG) control, which can provide inertia output, damp power oscillations, and offer frequency and voltage support to power grids, has become a growing trend in the control field of wind power generation. As a new technology,
Shuyi Wang, Qicai Wang, Zhijie Zeng, Wei Jiang, Jinyu Chen, Zhijun Wang   +5 more
doaj   +1 more source

THE RESONANT OVERVOLTAGE IN NON-SINUSOIDAL MODE OF MAIN ELECTRIC NETWORK

Electrical engineering & Electromechanics, 2018
Purpose. The resonant overvoltage arises in main electrical networks as a result of random coincidence of some parameters of circuit and its mode and it may exist for a relatively long time.
V. G. Kuznetsov, Yu. I. Tugay, V. V. Kuchanskiy, Yu. G. Lyhovyd, V. A. Melnichuk   +4 more
doaj   +1 more source

Fundamental Modeling of the Switching Transition in High-Speed Power Electronics

IEEE Access
Recent advances in semiconductor technology have paved the way for ultra-fast switching capabilities. This increase in switching speed enhances efficiency, power density, and frequency but also increases overvoltage oscillations at the switching node ...
Francois P. Du Toit, Ivan W. Hofsajer
doaj   +1 more source

HV isolated power supply system for complex multiple electrical potential equipment in 500 kV hybrid DC breaker

High Voltage, 2019
High-voltage direct current circuit breakers (HVDC CB) are one of the key technologies of multi-terminal DC systems and DC grids. Different from other equipment that use a large number of power electronic devices, the HVDC CB cannot obtain its power from
Xiangyu Zhang, Zhanqing Yu, Zhanqing Yu, Rong Zeng, Meng Zhang, Yuehuang Zhang, Fengliang Xiao, Wei Li   +7 more
doaj   +1 more source

Mechanism Analysis and Simulation Study of Closing Overvoltage Fault in EMU Circuit Breaker

Chengshi guidao jiaotong yanjiu
Objective The overvoltage caused by circuit breaker closing will aggravate the insulation aging of high voltage equipment when EMU (electric multiple units)passes neutral section.
ZHANG Mingrui, ZHANG Ningchuan, LIU Zhengwei   +2 more
doaj   +1 more source

Resolving Sub-Cycle Overvoltage Issue in Solar and Type-4 Wind Farms Employing Low Voltage Ride Through

IEEE Access
Over the past few years, transmission grid in the USA has seen numerous unintentional tripping events of large-scale inverter based resources (IBRs). These trippings were primarily caused by non-standard settings and certain fault ride through controls ...
Shah Mohazzem Hossain, Trupal Patel, Sukumar Brahma   +2 more
doaj   +1 more source