Results 31 to 40 of about 1,033,556 (314)
A Switch Partial Turned OFF Cycle by Cycle Current Limiting Method for 3L-NPC Half-Bridge Inverters
IEEE 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
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Heliyon, 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
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Energy 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
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Over Current Protection for PFM Control DC-DC Converter
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, 2009 An over current protection method suitable for Fixed ON-time PFM (Pulse Frequency Modulation) Control DC-DC converters is proposed. It is based on inductor bottom current limiting, realized by monitoring the synchronous rectifier current and extending the OFF-phase of the main switch until it decreases to a predetermined limit, and can properly limit ...
YAMADA, Kouhei +2 more
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Automatic Speed Control of Motor with Over Current and Thermal Protection
International 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
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Protective coordination of main and backup overcurrent relays with different operating modes of active super-conducting current controller [PDF]
Maejo 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
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Pakistan 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
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Hybrid reed: Solid-state devices are a new generation of protective relays [PDF]
Serbian Journal of Electrical Engineering, 2007 Research and development in the field of electromechanical protective relays has not been conducted for tens of years. Author’s approach allows viewing the problem of re-equipment of relay protection in a new way.
Gurevich Vladimir
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Energies, 2023 This paper proposes an impedance-accelerated inverse-time over-current protection optimization scheme based on the improved quantum genetic algorithm. First, the speed of remote backup protection is improved by increasing the optimization level of backup
Xia Zhang +4 more
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All-optical differential current detection technique for unit protection applications
, 2013 In this paper we demonstrate a novel, all-optical differential current protection scheme. By monitoring the optical power reflected from two matched hybrid fiber Bragg grating current sensors and using a simple optoelectronic threshold detector, an ...
Philip Orr +7 more
core +1 more source