Results 81 to 90 of about 14,323 (250)
The Journal of Engineering, 2019 In hierarchically connected UHV DC projects, the 1000 kV AC filter sub-bank in converter station is provided with two 500 kV circuit breakers. To determine the test DC component decay time constant when breakers break short-circuit current, relevant DC ...
Li Zhenqiang +3 more
doaj +1 more source
Rare Lightning and Convection Characteristics During Two Successive Tornadoes in Southern China
High Voltage, EarlyView.ABSTRACT Systematic investigations into lightning characteristics of tornado storms in China remain scarce. This study comprehensively analyses rare lightning behaviour and overshooting top characteristics for two successive tornadoes during a long‐lived supercell in southern China on 27 April 2024.
Fengquan Li +9 more
wiley +1 more source
New topology for voltage balancing in railway substations
, 2012 This paper deals with a new technique of voltage unbalance compensation for single phase railway substations. Using the concept of Chopper Controlled Impedance, the authors study the feasibility of an active Steinmetz circuit based on AC choppers.
New topology for voltage balancing in railway substations Raimondo G +3 more
core
Energy Efficiency Improvement with Reversible Substations for Electrified Transportation Systems
, 2023 More and more often overall energy efficiency of an electrified transportation system appears as a target of new constructions, sometimes with incomplete definitions of performance indexes to assess that target has been reached.
Signorino D., Mariscotti A., Giordano D.
core +1 more source
ARCADES: analysis of risk from cyberattack against defensive strategies for the power grid
IET Cyber-Physical Systems, 2018 In this study, the authors introduce ARCADES (Analysis of Risk from Cyberattack against DEfensive Strategy), a technique to systematically explore the cybersecurity defence strategies based on contingency rankings in power systems.
Md Touhiduzzaman +3 more
doaj +1 more source
High Voltage, EarlyView.ABSTRACT Tree‐contact single‐phase‐to‐ground fault (TSF) is a common and hazardous type of failure in distribution networks. TSF is likely to occur when overhead conductors contact moist tree branches, potentially leading to insulation breakdown, posing serious threats to grid safety.
Wenjun Ning +5 more
wiley +1 more source
FARIMA model-based communication traffic anomaly detection in intelligent electric power substations
IET Cyber-Physical Systems, 2019 The technological advances of intelligent electric substations have significantly improved the operational performance of power utilities by incorporating advanced monitoring and control functionalities.
Qiang Yang +4 more
doaj +1 more source
An Investigation into Substation Grounding and Its Implementation on Gaza Substation
Energy and Power Engineering, 2011 An investigation into the optimal design of a substation grounding system for the transmission substation in Gaza City, Palestine has been carried out. A research into the most influential parameters on the effectiveness of the substation grid system has been performed and its results have been incorporated into the Gaza case study.
Ahmed Hammuda +2 more
openaire +2 more sources
High Voltage, EarlyView.ABSTRACT This paper investigates the generation mechanism of quasi‐power‐frequency resonant overvoltage triggered by multiple lightning strikes in high‐voltage alternating current (HVAC) systems equipped with shunt reactors. Based on field measurements from a 500 kV AC system, equivalent and simplified circuit models have been established to analyse ...
Tao Liang +7 more
wiley +1 more source
UHF diagnostic monitoring techniques for power transformers
, 2004 This paper initially gives an introduction to ultra-high frequency (UHF) partial discharge monitoring techniques and their application to gas insulated substations.
Bennoch, C.J. +3 more
core