Performance Analysis of Controlled Reclosing Procedure of Transmission Lines under Non-ideal Conditions

Transient overvoltage phenomenon related to transmission lines switching procedures is a quite well known subject, as well as the corresponding site effects that may affect the electrical system reliability as a whole. In the face of these occurrences, if mitigating measures are not taken, insulation faults in transmission lines and other components of the system can occur with relative frequency. Added to a set of classic procedures for the minimization of these phenomena, other possibilities, unconventional, have presented themselves as attractive options to the process in question. In this context, this paper explores the potentialities of a strategy established in the literature, which relies on so-called controlled switching technology. This procedure consists in the determination and use of optimum instants for the operational reestablishment of the line operation, after a possible disconnection and, from these, the switches are made without the undesirable overvoltages mentioned herein. Despite the fact that the fundamentals of this methodology are known, this investigation is imbued with the purpose of including non-ideal operational conditions that can, for real situations in the field, impact on the effectiveness of the method performance.