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Current Limiting and Interrupting Characteristics of DC Hybrid Current Limiting Circuit Breaker According to Switching Sequence

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Abstract

Because of development of the photovoltaic and wind power generation, distributed generations have been increased. The increase in the distributed generations results in higher fault current which exceeds the capacity of the existing protective device when a fault occurs. Also distributed power sources using DC such as energy storage system and internet data center have been developed. However, DC is more difficult and dangerous to interrupt than AC because there is no zero crossing point in case of the occurrence of the short circuit current. Therefore, the study of protective devices against DC is needed. In this paper, DC hybrid current limiting circuit breaker (CLCB) is suggested. The trigger type superconducting fault current limiter was used for current limiting and the divergence current oscillation method was used for interruption. The short circuit test was simulated to analyze the current limiting and the interrupting characteristics of the DC hybrid CLCB through the PACAD/EMTDC modeling.

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Acknowledgements

This research was supported by Korea Electric Power Corporation (Grant Number: R18XA04).

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Correspondence to Sung-Hun Lim.

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Park, MK., Lim, SH. Current Limiting and Interrupting Characteristics of DC Hybrid Current Limiting Circuit Breaker According to Switching Sequence. Trans. Electr. Electron. Mater. 20, 252–256 (2019). https://doi.org/10.1007/s42341-019-00110-0

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  • DOI: https://doi.org/10.1007/s42341-019-00110-0

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