Lie, Tek TjingMoradian, mehdiGunawardane, kosala2024-12-062024-12-062024-12-02Electric Power Systems Research, ISSN: 0378-7796 (Print); 1873-2046 (Online), Elsevier. doi: 10.1016/j.epsr.2024.1112800378-77961873-2046http://hdl.handle.net/10292/18419This article presents an innovative design for low-voltage (LV) solid-state DC circuit breaker (SS-DCCB), incorporating the divided surge absorption technique (DSAT). This novel approach divides the circuit-breaking process into two distinct sections: a line-side surge absorber and a load-side surge damper. Upon detecting a fault through embedded current transformer (CT) measurements and microprocessor-defined thresholds, the SS-DCCB rapidly protects the system by disconnecting the load, ensuring reliable performance. The line-side surge is absorbed via a bypassed path utilizing silicon-controlled rectifier (SCRs) and a series electrolytic capacitor based subcircuit, while the load-side surge is mitigated through a circulation diode pathway. The adaptability of the proposed DSAT technique is assessed at two voltage levels: V1=300 V and V2=48 V, demonstrating its effectiveness and potential to extend in a wide range of LV and medium voltage (MV) levels. These findings validate the theoretical concept through MATLAB simulations and in-lab practical analysis demonstrated by the proposed model.© 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).http://creativecommons.org/licenses/by/4.0/0906 Electrical and Electronic EngineeringEnergy4008 Electrical engineeringJournal ArticleOpenAccess10.1016/j.epsr.2024.111280