Research on a Novel T-source Solid State Breaker for Direct Current System

Li, C.; Nie, Z.; Zhu, J.; Han, Y.; Xu, J.; Sun, J.; Li, C; Nie, Z; Zhu, J; Han, Y; Xu, J; Sun, J

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Research on a Novel T-source Solid State Breaker for Direct Current System

Li, C.; Nie, Z.; Zhu, J.; Han, Y.; Xu, J.; Sun, J.

Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering 38(3): 879-889

2018

ISSN/ISBN: 0258-8013

Accession: 105430188

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Summary

To deal with some challenges with traditional direct current (DC) circuit breaker (e. g. long period of fault interruption duration, difficult to extinguish the arc, critical fast detection and accurate timing), this paper proposed a novel T-source DC solid-state breaker (TSDCB) which can switch off automatically during transient fault conditions by employing a two windings coupled transformer and a capacitor formed in T-shape as an impedance network. The new scheme will make use of impendence network to interrupt the DC system without current monitor and control system so as to enhance the reliability. Based on the analysis of equivalent two-port network, it analyzed the topological structure of TSDCB and gave the voltage and current transfer functions to verify the validity of the topology from steady state and transient state aspects. Additionally it started from the inherent characteristics of thyristor reverse recovery process and combined the external circuit features of short circuit process of TSDCB to take deduction for switching off processes of thyristor. It also elaborated the influences of thyristor reverse recovery parameter design, and took analysis for the influences of power line inductance. Finally, simulations and experiments showed that the TSDCB can interrupt fault current automatically and more quickly, which is of great value to short circuit protection in DC micro-grid system.

Research on a Novel T-source Solid State Breaker for Direct Current System

Li, C.; Nie, Z.; Zhu, J.; Han, Y.; Xu, J.; Sun, J.

Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering 38(3): 879-889

2018

Full-Text Article emailed within 1 workday

Summary

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