Results 91 to 100 of about 56,549 (215)

Design of a Solid-State Circuit Breaker for a DC Grid-Based Vessel Power System

open access: yes, 2019
Electric propulsion and integrated hybrid power systems can improve the energy efficiency and fuel consumption of different kinds of vessels. If the vessel power system is based on DC grid distribution, some benefits such as higher generator efficiency ...
Juan José Valera   +4 more
core   +1 more source

Enhanced dynamic support strategies of grid-forming-PMSG based on DC-voltagesynchronization: Frequency and Q support perspective

open access: yesInternational Journal of Electrical Power & Energy Systems
The DC-Voltage Synchronization based Grid-Forming PMSG has voltage source characteristics, e.g. frequency and reactive power support function, however, the support capability is limited, and the regulation potential is not fully utilized.
Dejian Yang   +6 more
doaj   +1 more source

Simulation of DC/DC converter for DC nano-grid integrated with solar PV generation

open access: yes, 2015
Distributed energy resources (DER) based micro grid and Nano-grid framework is most technically viable bottom-top approach to sustainably meet ever-increasing demand of rural and urban communities. Recently the growth of DC operative home appliances like
Rajendran, S.   +5 more
core   +1 more source

Vulnerability analysis of power grid structure based on complex network theory

open access: yesFrontiers in Energy Research
IntroductionThe key nodes of an intelligent distribution network significantly impact the reliability and stability of the distribution network’s operation. The failure of these key nodes can severely affect the safe operation of the distribution network.
Zhichun Yang   +6 more
doaj   +1 more source

Coordinated Low-Voltage Ride-Through Control Strategy for Flywheel Energy Storage Systems

open access: yesApplied Sciences
To address DC-link voltage fluctuation, active-power imbalance between the machine side and the grid side, and double-frequency distortion in the grid current of a flywheel energy storage system (FESS) under symmetrical and asymmetrical voltage sag ...
Dahai Guo   +6 more
doaj   +1 more source

Dual lanthanides synergistically boost stability and kinetics for spinel LiMn2O4 cathodes

open access: yesCommunications Chemistry
Mn-site doping in spinel LiMn2O4 (LMO) mitigates Mn3+-induced Jahn-Teller distortion. However, this strategy faces inherent trade-offs. Specifically, low-valent doping weakens oxygen bonding, while high-valent doping increases Mn3+ content.
Zhushun Zhang   +11 more
doaj   +1 more source

Voltage stability assessment in semi-autonomous DC-grids with multiple power modules

open access: yes, 2013
Basic concepts with respect to stable operation of semi-autonomous low-voltage DC-grids are discussed. Design considerations on the output impedances of power electronic converters are analysed in order to avoid resonance issues within a DC-grid.
K. Rykov   +10 more
core   +1 more source

Utilization of Parked EV-ESS for Power Management in a Grid-Tied Hybrid AC/DC Microgrid

open access: yes, 2015
This paper proposes an electric vehicle-energy storage system (EV-ESS) charge/discharge controller based on the deviation between load power and generated power.
Rahman, Md Shamiur   +2 more
core   +1 more source

Power Coordinated Control Strategy for Grid-Connected DC Microgrid Considering State of Charge [PDF]

open access: yes
ObjectivesExisting research on decentralized coordinated control strategies mainly focuses on power distribution within DC microgrid, with limited consideration given to the operation of grid-connected DC microgrids.
YAO Yanjun   +6 more
core   +1 more source

Fault detection and location in DC systems from initial di/dt measurement

open access: yes, 2012
The use of DC for primary power distribution has the potential to bring significant design, cost and efficiency benefits to a range of power transmission and distribution applications.
Burt, Graeme   +3 more
core  

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