AC Fault Current Limiting Using LC DC Circuit Breaker

Dragan Jovcic

doi:10.1109/GTD49768.2023.00046

AC Fault Current Limiting Using LC DC Circuit Breaker

Dragan Jovcic^* (Corresponding Author)

^*Corresponding author for this work

Engineering

Research output: Chapter in Book/Report/Conference proceeding › Published conference contribution

Abstract

High fault current is becoming an important challenge with AC distribution systems, which may demand costly switchgear upgrades. This paper explores use of a DC CB (Circuit Breaker), which has been commercialized recently, as an AC fault current limiter. The main motivation is the fast operation of LC DC CBs, generally below 2 ms, which provides counter voltage and limitation of fault current well before the main AC breaker operates. The steady-state study on a 13.8 kV distribution test system shows that a series capacitor of around 800 μF, 20 kV would enable 5 times lower fault current, while satisfying basic design requirements for a practical 2 ms DC CB. The considered LC DC CB would not introduce any impedance in the load current path in the closed (bypass) state. Detailed transient simulation on PSCAD model illustrates system responses in time domain.

Original language	English
Title of host publication	2023 IEEE PES GTD International Conference and Exposition (GTD 2023)
Editors	Mehmet Tahir Sandikkaya, Omer Usta
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	104-108
Number of pages	5
ISBN (Electronic)	9781728170251
DOIs	https://doi.org/10.1109/GTD49768.2023.00046
Publication status	Published - 29 Sept 2023
Event	2023 IEEE PES Generation, Transmission and Distribution International Conference and Exposition, GTD 2023 - Istanbul, Turkey Duration: 22 May 2023 → 25 May 2023

Conference

Conference	2023 IEEE PES Generation, Transmission and Distribution International Conference and Exposition, GTD 2023
Country/Territory	Turkey
City	Istanbul
Period	22/05/23 → 25/05/23

Bibliographical note

Funding information: This study is supported by Scottish Enterprise HGSO program.

Keywords

AC fault current limiting
AC fault protection
DC Circuit Breakers
DC switchgear

Access to Document

10.1109/GTD49768.2023.00046Licence: Unspecified

Cite this

AC Fault Current Limiting Using LC DC Circuit Breaker. / Jovcic, Dragan (Corresponding Author).
2023 IEEE PES GTD International Conference and Exposition (GTD 2023). ed. / Mehmet Tahir Sandikkaya; Omer Usta. Institute of Electrical and Electronics Engineers Inc., 2023. p. 104-108.

Research output: Chapter in Book/Report/Conference proceeding › Published conference contribution

Jovcic, D 2023, AC Fault Current Limiting Using LC DC Circuit Breaker. in MT Sandikkaya & O Usta (eds), 2023 IEEE PES GTD International Conference and Exposition (GTD 2023). Institute of Electrical and Electronics Engineers Inc., pp. 104-108, 2023 IEEE PES Generation, Transmission and Distribution International Conference and Exposition, GTD 2023, Istanbul, Turkey, 22/05/23. https://doi.org/10.1109/GTD49768.2023.00046

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abstract = "High fault current is becoming an important challenge with AC distribution systems, which may demand costly switchgear upgrades. This paper explores use of a DC CB (Circuit Breaker), which has been commercialized recently, as an AC fault current limiter. The main motivation is the fast operation of LC DC CBs, generally below 2 ms, which provides counter voltage and limitation of fault current well before the main AC breaker operates. The steady-state study on a 13.8 kV distribution test system shows that a series capacitor of around 800 μF, 20 kV would enable 5 times lower fault current, while satisfying basic design requirements for a practical 2 ms DC CB. The considered LC DC CB would not introduce any impedance in the load current path in the closed (bypass) state. Detailed transient simulation on PSCAD model illustrates system responses in time domain.",

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N2 - High fault current is becoming an important challenge with AC distribution systems, which may demand costly switchgear upgrades. This paper explores use of a DC CB (Circuit Breaker), which has been commercialized recently, as an AC fault current limiter. The main motivation is the fast operation of LC DC CBs, generally below 2 ms, which provides counter voltage and limitation of fault current well before the main AC breaker operates. The steady-state study on a 13.8 kV distribution test system shows that a series capacitor of around 800 μF, 20 kV would enable 5 times lower fault current, while satisfying basic design requirements for a practical 2 ms DC CB. The considered LC DC CB would not introduce any impedance in the load current path in the closed (bypass) state. Detailed transient simulation on PSCAD model illustrates system responses in time domain.

AB - High fault current is becoming an important challenge with AC distribution systems, which may demand costly switchgear upgrades. This paper explores use of a DC CB (Circuit Breaker), which has been commercialized recently, as an AC fault current limiter. The main motivation is the fast operation of LC DC CBs, generally below 2 ms, which provides counter voltage and limitation of fault current well before the main AC breaker operates. The steady-state study on a 13.8 kV distribution test system shows that a series capacitor of around 800 μF, 20 kV would enable 5 times lower fault current, while satisfying basic design requirements for a practical 2 ms DC CB. The considered LC DC CB would not introduce any impedance in the load current path in the closed (bypass) state. Detailed transient simulation on PSCAD model illustrates system responses in time domain.

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ER -

AC Fault Current Limiting Using LC DC Circuit Breaker

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Bibliographical note

Keywords

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