The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
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Extension of Cut-off Capacity of DC Circuit Breaker due to Superconducting Coil Application

초전도 코일 적용으로 인한 DC 차단기의 차단 용량 증대

  • Received : 2019.02.18
  • Accepted : 2019.03.25
  • Published : 2019.04.01
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Abstract

We proposed a current Interruption type DC superconducting circuit breaker(I-DC SCB), a protection device that combines the current limiting technology of a superconductor with the cut-off technology of circuit breaker. Unlike existing protective devices, the current I-DC SCB is a device that combines two protection functions, notably improving failure probability and operational reliability. It is also applicable to all DC systems, such as HV, MV, and LVDC, due to the ease in capacity increase. The 100 kV I-DC SCB was designed after taking into account the actual power system conditions, followed by an analysis of the transient characteristics and the breaking range of the limiter. The results of the analysis showed that the I-DC SCB had a fault current limit of about 75% at the rated voltage, and completed the cut-off operation within about 20 ms.

Keywords

Acknowledgement

This research was supported by Korea Electric Power corporation [grant number: R16XA01] This work was supported by the National Research Foundation of Korea(NRF) grant funded by the Korea government(MSIT)(No.2018R1A2B2004242)

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