Modelling and Analysis of a Modified Bidirectional Z-source Solid State Circuit Breaker

With the development of the aerospace industry, the protection issue of satellite power supply system has become increasingly prominent. To guarantee the power density of bidirectional solid-state circuit breaker (SSCB) for aerospace usage, this paper proposes a bi-directional Z-source SSCB (ZSCB) with a high device reuse rate, which is bi-directionally transformed without appending new components. In this paper, a mathematical model is established and the active device is designed by delimiting the parameter acceptance domain. In addition, Saber simulation is carried out to validate the topology autonomous shutdown characteristics and load mutation capability, and the effectiveness of the proposed topology is verified along with the modelling method.