Operation Characteristics of Superconducting DC Circuit Breaker for Reliability Assessment in a Transient State of MMC VSC-HVDC

Globally, the supply and demand of DC are increasing due to climate change and the technological development of power semiconductors. In this trend, the International Large Electric Systems Council tried to solve the above problems by researching HVDC systems. However, the application range of HVDC...

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Bibliographic Details
Published in:Journal of electrical engineering & technology 2023, 18(3), , pp.1503-1511
Main Authors: Park, Sang-Yong, Choi, Hyo-Sang
Format: Article
Language:English
Subjects:
Electrical Engineering
Electrical Machines and Networks
Electronics and Microelectronics
Engineering
Instrumentation
Original Article
Power Electronics
전기공학
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Summary:Globally, the supply and demand of DC are increasing due to climate change and the technological development of power semiconductors. In this trend, the International Large Electric Systems Council tried to solve the above problems by researching HVDC systems. However, the application range of HVDC systems continues to widen. Accordingly, the reliability of dangerous power transmission and distribution through the transient state of the DC system is becoming a new problem. Since DC has no frequency compared to AC, the growth rate of the fault current is very fast, and there is no cutting-off zero point. Therefore, a technology capable of stably cutting off the DC fault current was required. We proposed a hybrid superconducting DC circuit breaker. It quenches the superconducting current limiter and creates an artificial zero point of the mechanical DC circuit breaker. Therefore, DC fault current without frequency can be cut off stably and effectively. To examine the operating characteristics of the proposed superconducting DC circuit breaker, we applied the circuit breaker to the MMC VSC-HVDC system model. In this paper, the current limiting rate of the initial fault current of the superconducting DC circuit breaker, the artificial breaking zero point, and the breaking operation time were analyzed. As a result, it was confirmed that the superconducting current-limiting module limited the initial current-limiting current to about 58.27%. In addition, it was confirmed that the mechanical DC circuit breaker made an artificial cutting-off zero point and performed a fast-breaking operation of about 80% or more.
ISSN:1975-0102
2093-7423
DOI:10.1007/s42835-023-01442-x