Topology design and manufacturing of enhanced current‑attenuating solid‑state characteristic DC circuit breaker based on cascade structure

Can Ding; Yinbo Ji; Zhao Yuan; Yiji Shi

Topology design and manufacturing of enhanced current‑attenuating solid‑state characteristic DC circuit breaker based on cascade structure

Vol. 26, No. 1, pp. 214-226, Jan. 2026

10.1007/s43236-025-01068-4

Solid-state characteristic circuit breaker

DC distribution network

Topology

Current-attenuating

Prototype

Abstract

Solid-state characteristic DC circuit breakers (SSDCCB) are crucial devices in ensuring the efficient and the stable operation of low-voltage DC (LVDC) distribution networks. A novel topology for grid applications is proposed in this paper, termed the Cascaded Attenuating current Solid-State characteristic DC Circuit Breaker (CASSCB), which is an enhancement based on traditional SSCBs. This innovation introduces the primary current-attenuating branch to the front end of the diversion branch, which is composed of sub-modules cascaded in series. The primary current-attenuating circuit, which is established by combining current-attenuating reactance with resistance in parallel, effectively curbs the second-stage rise rate and the peak value of incident currents, thereby mitigating the impact on the grid. In the sub-modules, cost-effective SCRs are strategically used in place of high-priced IGBTs for breaking and voltage division, leading to a significant reduction in overall costs. A thorough analysis of the topology principles of the CASSCB is conducted alongside theoretical derivations. In addition, methods are outlined for optimizing the selection of key component parameters. To further verify its performance, a validation model was established using MATLAB/Simulink tools, and a small-scale experimental prototype is developed. Results affirm the feasibility and the effectiveness of the CASSCB topology.

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Cite this article

[IEEE Style]

C. Ding, Y. Ji, Z. Yuan, Y. Shi, "Topology design and manufacturing of enhanced current‑attenuating solid‑state characteristic DC circuit breaker based on cascade structure," Journal of Power Electronics, vol. 26, no. 1, pp. 214-226, 2026. DOI: 10.1007/s43236-025-01068-4.

[ACM Style]

Can Ding, Yinbo Ji, Zhao Yuan, and Yiji Shi. 2026. Topology design and manufacturing of enhanced current‑attenuating solid‑state characteristic DC circuit breaker based on cascade structure. Journal of Power Electronics, 26, 1, (2026), 214-226. DOI: 10.1007/s43236-025-01068-4.