A Modular Bidirectional Solid-State DC Circuit Breaker for LV and MVDC Grid Applications

Nandakumar, S.; Raghavendra, Venkata; Ajmal, C. N. Muhammed; Banavath, Satish Naik; Rajashekara, Kaushik

doi:10.1109/jestpe.2022.3177248

Cited by 11 publications

(1 citation statement)

References 24 publications

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“…Other bidirectional SCR-SSCB configurations were introduced in [21], [22], where a single semiconductor device is used in the main circuit in either forward or reverse operation. This leads to low on-state losses.…”

Section: Introductionmentioning

confidence: 99%

Low-Loss Bidirectional Solid-State Circuit Breakers With Reliable Breaking Capability for Protecting DC Microgrids

Wang,

Ugalde-Loo

et al. 2023

IEEE Trans. Power Electron.

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Silicon-controlled rectifier-based dc solid-state circuit breakers (SCR-SSCBs) have received an increased attention for their ease of control and high efficiency, but their considerable conduction losses remain a major disadvantage. This paper presents a new bidirectional SCR-SSCB topology which reduces the conduction losses by ∼50%, with the loss reduction attributed to an inductor being eliminated from the main circuit during normal operation. This is achieved by conducting current through one semiconductor switch instead of two as in conventional devices. In addition, the presented topology enhances the reliability of protection by enabling a controlled interruption of short-circuit faults, in which fault interruption is not affected by the parameters of external systems to which the circuit breaker is connected to. A second topology which reduces the size of the capacitors in the commutating circuit is also introduced. A detailed analysis of the operating principle of the two novel topologies is presented. Recommendations supported by mathematical modeling are provided for selecting the relevant components of the devices. The performance of the two topologies was verified through simulation and experimental tests.

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Section: Introductionmentioning

confidence: 99%