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Ultrafast Solid-State Circuit Breaker with a Modular Active Injection Circuit
Journal article   Open access   Peer reviewed

Ultrafast Solid-State Circuit Breaker with a Modular Active Injection Circuit

Reza Kheirollahi, Hua Zhang, Shuyan Zhao, Jun Wang and Fei Lu
IEEE Journal of Emerging and Selected Topics in Industrial Electronics, v 3(3), pp 1-1
08 Jun 2021
DOI: https://doi.org/10.1109/JESTIE.2021.3087952
url
https://doi.org/10.1109/jestie.2021.3087952View
Accepted (AM)Open Access (Publisher-Specific),  Open

Abstract

Circuit breakers DC Circuit Breakers Impedance Logic gates Modular Active Injection Circuits MOSFET Oscillators Silicon carbide Solid-State Circuit Breakers Time factors
This paper proposes a new modular active injection circuit (AIC) for solid-state circuit breaker (SSCB). The modular AIC is used to achieve soft-switching turn-off during DC current interruption. The proposed AIC presents following contributions: selectable resonant currents are obtained to obtain a reliable artificial zero crossing points in DC currents; current rating scalability is provided; passive components of the AIC are optimized using particle swarm optimization (PSO) algorithm and new proposed objective functions; an external wireless charger is developed to charge the injection capacitor of the AIC to provide voltage isolation, compactness, and flexibility in choosing the pre-charge voltage value on the injection capacitor; the proposed AIC needs no discharge circuits which simplifies the control and accelerates reclosing process. The proposed SSCB is simulated in a 6kV system in PSCAD/EMTDC in interrupting currents of normal and different scenarios . The designed SSCB can interrupt the DC currents up to 200A with the adaptive response time from 3.74s to 6.71s, faster response time in interrupting higher values of DC currents. The effectiveness of the proposed SSCB in practice is validated by experiments of a downsize 380V/20A prototype with only 2.8s response time and 99.91% efficiency.

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