Desafios de Técnicas de Localização de Faltas em Sistemas de Transmissão com Compensação Série
Keywords: Fault location, phasor estimation, series-compensated lines, short-circuits, subsynchronous resonance, transmission lines
AbstractIn this paper, the impacts of fixed series-compensated transmission lines (TL) on classical phasor-based fault location techniques are evaluated, in order to identify the typical challenges faced by such methods. To do so, several Alternative Transients Program (ATP) fault simulations were carried out in a 500 kV/60 Hz transmission system, which is modeled considering parameters taken from a real Brazilian network. Comparative analyses are performed with uncompensated TL. From the obtained results, low frequencies superimposed to voltage and current signals due to the subsynchronous resonance affect the performance of phasor estimation filters and consequentely, fault location procedures. Therefore, the development of solutions that can be immune to such subsynchronous frequencies is needed.