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

The Korean Institute of Electrical Engineers (대한전기학회)
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Characteristics of Interruption Ability in DC Circuit Breaker using Superconducting Coil

초전도 코일을 이용한 DC 회로 차단기의 차단 능력 특성

  • Received : 2018.11.14
  • Accepted : 2018.12.02
  • Published : 2019.01.01
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Abstract

Development of DC interruption technology is being studied actively for enhanced DC grid reliability and stability. In this study, coil type superconductor DC circuit breaker was proposed as DC interruption. It is integration technology that combined current-limiting technique using superconductor and cut-off technique using mechanical DC circuit breaker. Superconductor was applied to the coil type. In simulation, Mayr arc model was applied to realize the arc characteristic in the mechanical DC circuit breaker. PSCAD/EMTDC had used to model and perform the simulation. To find out the protection range of coil type superconductor DCCB, the working operation have analyzed based on the rated voltage of DCCB. The results confirmed that, according to apply the limiting device, the protection range was increased in twice. Therefore, the probability of failure of interruption has lowered significantly.

Keywords

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Fig. 1 Configuration of coil type superconductor DC circuit breaker

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Fig. 2 Coil type superconductor quenching characteristic graph

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Fig. 3 DC current characteristics between with and without superconductor when the input voltage is 120 kV

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Fig. 4 DC current characteristics between with and without superconductor when the input voltage is 180 kV

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Fig. 5 DC current characteristics between with and without superconductor when the input voltage is 240 kV

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Fig. 6 Interruption time and power burden of coil type superconductor applied DC circuit breaker according to increase of input voltage

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