Publication Detail

Analysis and Transient Design Limits for H-Bridge Type DC Breakers

Pradya Prempraneerach, Chathan Cooke, Chrys Chryssostomidis

The emerging use of dc power systems places a greater need for dc circuit breakers, an important part of system protection. Unlike with ac, for dc there is no inherent current-zero in the applied power to aid in breaking the current. In this paper a novel passive means to redirect the fault current to force a current reversal and a current zero in the switch element is analyzed. The circuit employs inductance and capacitance elements arranged in an H-Bridge like configuration, which then enables a solid-state thyristor switch within the bridge to open and achieve dc circuit breaker action. Detailed transient analysis with some tests of this passive-reversal H-Bridge circuit breaker is presented and the results used to provide a theoretical basis for breaker designs of this type. Design relations for rapid breaking and minimal component size for weight reduction were developed and account for SCR limiting parameters such as minimum reverse time, tq, peak currents, Ipk, and hold-off voltage, Vpk.

type: Technical reports

Parent Project

Project No.: 2014-ESRDC-04-LEV
Title: ESRDC - Designing and Powering the Future Fleet Additional Task 1.4.3 Concept Refinement

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