Results 21 to 30 of about 3,276,165 (313)

A Switch Partial Turned OFF Cycle by Cycle Current Limiting Method for 3L-NPC Half-Bridge Inverters

open access: yesIEEE Access, 2020
Instantaneous hardware protection is a very important method to protect inverters at the moment of over current or short circuit fault. For standalone inverters, the hardware protection can also be modified to achieve current limiting during the over ...
Xun Gao   +5 more
doaj   +1 more source

Adaptive protection coordination scheme in microgrids using directional over-current relays with non-standard characteristics

open access: yesHeliyon, 2021
Protection coordination of AC microgrids (MGs) is a challenging task since they can operate either in grid-connected or islanded mode which drastically modifies the fault currents.
Sergio D. Saldarriaga-Zuluaga   +2 more
doaj   +1 more source

An Improved Inverse-Time Over-Current Protection Method for a Microgrid with Optimized Acceleration and Coordination

open access: yesEnergies, 2020
This paper presents an improved inverse-time over-current protection method based on the compound fault acceleration factor and the beetle antennae search (BAS) optimization method for a microgrid.
Liang Ji   +7 more
doaj   +1 more source

Punctuated equilibria and 1/f noise in a biological coevolution model with individual-based dynamics [PDF]

open access: yes, 2003
We present a study by linear stability analysis and large-scale Monte Carlo simulations of a simple model of biological coevolution. Selection is provided through a reproduction probability that contains quenched, random interspecies interactions, while ...
A. Roberts   +43 more
core   +1 more source

Inverse time overcurrent optimization of distribution network with DG based on improved gray wolf algorithm

open access: yesEnergy Reports, 2022
Inverse time overcurrent protection can be applied to distribution networks with distributed power sources because of its superior protection characteristics, but its time limit coordination and value setting are complicated, which limits its large-scale
Yang Yu   +4 more
doaj   +1 more source

A 5.3mW, 2.4GHz ESD protected Low-Noise Amplifier in a 0.13μm RFCMOS technology [PDF]

open access: yes, 2007
An Electrostatic Discharge (ESD) protected Low- Noise Amplifier (LNA) for the 2.4 GHz ISM band designed in a 0.13 mum standard RFCMOS technology is presented. The amplifier, including packaging effects, achieves 16.8 dB power gain, reflexion coefficients
Brandano, Davide   +3 more
core   +1 more source

'Too well-travelled', not well-formed? the reform of 'criminality information sharing' in the UK [PDF]

open access: yes, 2013
The UK Supreme Court will eventually have to pass judgment on the compliance of the legal and policy framework for ‘criminality information sharing’ with the stipulations of Article 8 of the European Convention on Human Rights, and perhaps in relation ...
Grace, Jamie
core   +2 more sources

Automatic Speed Control of Motor with Over Current and Thermal Protection

open access: yesInternational Journal of Advanced Research in Science, Communication and Technology, 2022
This paper aims to design a controller to minimize the accidents of mechanical failure of industrial generators and motors under heavy load or malfunction. The controlling parameters such as the speed of motor is done via controlling the voltage and current fed to the motor. The speed control can be possible by using PWM technique.
null Mr. Sagar Raut   +1 more
openaire   +1 more source

Protective coordination of main and backup overcurrent relays with different operating modes of active super-conducting current controller [PDF]

open access: yesMaejo International Journal of Science and Technology, 2014
Active superconducting current controllers (ASCCs) are new generation of series compensators, which can also be categorised as fault current limiters because of their ability to decrease the fault current continuously.
Ahmad Ghafari   +3 more
doaj   +1 more source

Smart Grid Performance Improvement with AC Solid-State Circuit Breaker having Charging and Rebreaking Capabilities

open access: yesPakistan Journal of Engineering & Technology, 2022
Although traditional electromechanical circuit breakers have a proven track record as efficient and reliable circuit safety devices. Emerging power distribution technologies and architectures such as DC microgrids require advanced breaking performance ...
Muhammad Zulqair Nain, Tahir Mahmood
doaj   +1 more source

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