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Non-Unit Ultra-High-Speed DC Line Protection Method for HVDC Grids Using First Peak Time of Voltage
IEEE Transactions on Power Delivery, 2021The high-speed and selective dc line protection method is required for the safe operation of HVDC grids. In this paper, the expressions of the line-mode fault component voltage at the line end as well as its first peak time (FPT) when different internal ...
Chenhao Zhang, G. Song, Xinzhou Dong
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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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Advanced Rapid Directional Over-Current Protection for DC Microgrids Using K-Means Clustering
IEEE Transactions on Power DeliveryOver-current (OC) protection is one of the often-used protections in DC microgrids. Its rapid operation, critical for protecting the system, is a key reason for its widespread use, as it plays a pivotal role in swiftly isolating fault conditions and ...
Saeed Sanati +2 more
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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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Protective Systems in DC Microgrids
2019The aging power system causes to several grid problems such as intermittency, power quality issues, and blackouts since a few decades. Therefore, the power infrastructure requires serious troubleshooting studies in a wide manner. The distributed generation and integration of large photovoltaic (PV) plants to the existing utility have led to intensive ...
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Protection of Low-Voltage DC Microgrids
IEEE Transactions on Power Delivery, 2009In this paper, a low-voltage (LV) DC microgrid protection system design is proposed. The LV DC microgrid is used to interconnect distributed resources and sensitive electronic loads. When designing an LV DC microgrid protection system, knowledge from existing DC power systems can be used.
D. Salomonsson, L. Soder, A. Sannino
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Converter Overvoltage Protection for DC-Grids
2018 IEEE International Telecommunications Energy Conference (INTELEC), 2018Overvoltage protection for commercial and household installations with AC is well known and the market provides a multitude of suitable devices. However, in DC-grids, different structures, sources and loads are present, so new solutions are necessary.
Julian Kaiser +7 more
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