Chaveamento controlado de linhas de transmissão por meio de disjuntores equipados com manobra tripolar.

Abstract

The present work is about a study of controlled switching in transmission lines through three-pole switched circuit breakers applied in energization switching and lines reclosing. It will be modeled a electrical system with two bars at ATP (Alternative Transients Program), to observer the transient among the line due the switching. An algorithm is applied in the system to choose the best moment to open or close the circuit breaker. This consists, basically, to determinate the instant in when the voltages between the circuit breaker contact is zero and compare the values of overvoltage when happens a unipolar switching that the instants in each phases as distintic and the tripolar switching when the circuit breaker closes all the contacts simultaneously. It will be analyzed the following conditions of operation: energization, simultaneous reclosing of phases and independently without shunt compensation, with 30% and 80% shunt, considering the effects of trapped charge.