Análise da resposta transitória dos transformadores de potencial capacitivos via Software ATPDraw.

Abstract

The Coupling Capacitor Voltage Transformer (CCVT) provides voltage signal information from the electrical power system for control, protection and measurement. Failures in a CCVT can provoke abrupt output transmission lines that result in severe penalties established by the regulation of the electricity sector. For this reason, it is necessary to maintain agility to restore the system as quickly as possible, as well as preventive measurements to reduce unplanned power failure. Thus, studies have been done to model the TPC for electromagnetic transient analysis. Given the above, the work shows over some simulations, the ferroresonance is one of the phenomena that should be avoided on a TPC, since the secondary voltage of the transformer becomes destructive to electrical equipment. Another aspect analyzed in this work is the operation of circuit breakers and their effects on the secondary voltage of a TPC. All simulations were performed both in ATPDraw as in PSpice for a Coupling Capacitive Voltage Transformer of 138 kV.