A Novel Bidirectional Γ-Z-Source Solid State Circuit Breaker for More Electirc Aircraft

Due to the requirements by climate change, significant advancements have been made in the electric power system (EPS) of More Electric Aircraft (MEA), leading to the widespread use of High Voltage DC (HVDC) EPS. An effective protection measure for HVDC is the Solid-State Circuit Breaker (SSCB). To guarantees the power density of bi-directional SSCB, this paper proposes a bi-directional Γ-Z-source SSCB (ΓZSCB) with a high device reuse rate. A mathematical model is established by analyzing the steady state and fault transient. Furthermore, a Saber simulation is conducted to validate the topology's autonomous shutdown characteristics and load mutation capability. The effectiveness of the proposed topology is verified along with the modeling method.