Modeling and simulation of DC resonant circuit breakers

The specific problems of the disconnection of HVDC breakers need an analysis of performances at laboratory scale. In the study of hybrid circuit breakers with commutation, three steps are necessary: modeling, simulation and experimental tests. The paper presents a modeling procedure for a hybrid commutation breaker intended to operate using resonant circuits phenomenon. Using the Matlab platform, the simulation of the disconnection of short-circuit process, highlights the reduction of the disconnection period at a low value of the short-circuit current. The performance of the electric equipment is analyzed in the laboratory, in terms of the concordance between the model and the simulation procedure.