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1 Computer Applications in Electrical Engineering

1 2015

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Short-circuit duration and dynamic forces in central section of substation

Frąckowiak R., Piechocki P.

Computer Applications in Electrical Engineering

2015

Vol. 13

220--230

Presented topic is the continuation of investigations concerning the estimation of short-circuit duration when computing the short-circuit effects using probabilistic methods. In the paper, an expanded model of distribution substation for simulation-based analysis of the short-circuit conditions and dynamic effects in the central section of bus-bar is presented. In the model, the operation of protections in the transformer bay has also been considered. The results of simulations aiming to assess the frequency of occurrence of the defined values of short-circuit current, short-circuit duration and dynamic forces are reported. Also, the question: “How the transformer’s protections involved in simulation affect the simulated short-circuit conditions?” has been answered. Computations have been carried out for four different EAZ system configurations.