Results 261 to 270 of about 1,070,128 (312)
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Coordination of MMC converter protection and DC line protection in DC grids
2016 IEEE Power and Energy Society General Meeting (PESGM), 2016This paper studies the coordination of MMC converter protection and DC line protection in DC transmission networks. To quickly isolate a DC line fault, hybrid DC circuit breaker is connected at each end of every DC transmission line. DC line protection based on measuring derivative of DC voltage is employed to timely trip faulted DC line only. The goal
null Weixing Lin +3 more
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Overload protection in digitally controlled DC-DC converters
2006 37th IEEE Power Electronics Specialists Conference, 2006This paper presents an approach to overload protection based on a predictive average current-mode control technique for digitally controlled DC-DC switched-mode power supplies. The proposed approach can be applied in voltage-mode or current-mode control architectures. The current limit, the converter actions upon detecting an overload, and the shape of
Hao Peng, Dragan Maksimovic
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High gain DC-DC converter with protection circuit
2011 International Conference on Energy, Automation and Signal, 2011This paper proposes a method to obtain a protected voltage gain by employing a protection circuit for the voltage doubler or multiplier circuit in an isolated tyde DC-DC Converter. The entire set up consists of a phase shift converter with a protected bridge/voltage doubler rectifier on the output side.
P. D. Dharmesh, D. Elangovan
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Research on DC Line Protection
2014 International Symposium on Computer, Consumer and Control, 2014As the main protection of high voltage direct current (HVDC), the traveling wave protection is not easily affected by the resistance and capacitance of the transmission line, but there are still some shortcomings. This article not only briefly analyses some the traveling wave protection method based on wavelet transform and mathematical morphology, but
Zhouxing Fu +4 more
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AC/DC railway electrification and protection
9th IET Professional Development Course on Electric Traction Systems, 2006The technical strength of all electrification schemes lies in the fact that the prime mover is removed from the train; but this is also its economic weakness. By taking power from a distribution network there is almost unlimited power available which has been efficiently produced but the cost of providing the fixed installations can only be justified ...
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Design of DC system protection
2013 IEEE Electric Ship Technologies Symposium (ESTS), 2013A modified Z-source breaker topology is introduced to minimize the reflected fault current drawn from a source while retaining a common return ground path. A conventional Z-source breaker does not provide steady-state overload protection and can only guard against extremely large transient faults. The Z-source breaker can be designed for considerations
A. H. Chang +3 more
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DC overcurrent protection-Where we stand
Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting, 1993The procedures used to determine the DC ratings for fuses and the issues pertinent to ensuring a proper DC fuse application are discussed. For a better understanding of how fuses are rated for DC, Underwriters Laboratories UL Standard 198L is examined.
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A DC-DC boost converter with short circuit protection
Proceedings of IECON'94 - 20th Annual Conference of IEEE Industrial Electronics, 2002In this paper, a modified DC/DC boost power convertor topology is proposed that provides short circuit protection to all power semiconductor devices of the power circuit. The proposed topology is analysed and simulated, and the experimental results obtained from a 160 W unit confirm the analysis. >
G.A. Garvelis, S.N. Manias, G. Kostakis
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Over Current Protection for PFM Control DC-DC Converter
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, 2009An 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 ...
Kouhei YAMADA +2 more
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A fully protected push-pull current-fed DC-DC converter
Proceedings of the IECON'97 23rd International Conference on Industrial Electronics, Control, and Instrumentation (Cat. No.97CH36066), 2002This paper presents an isolated DC-DC converter designed to operate as a primary stage of an on-board DC-AC power supply for diesel-electric engines. The DC-AC power supply must provide a sinusoidal waveform of 127 V RMS from 72 V DC bus of the engine. The DC-DC push-pull current-fed converter has been used to obtain an isolated 200 V DC output voltage
A.L. Rabello +3 more
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