Impact of Distributed Series Reactors on Protection Coordination

Distributed Series Reactor (DSR) is a new smart grid technology intended to control power flows in the transmission network. A DSR dynamically controls power flows by modulating line impedance on demand. Because of that, DSRs may adversely impact operation and coordination of distance relays. This paper presents an analysis of the potential effect of DSR technology on the protection system. The analysis is conducted on a realistic power system model representing a regional transmission network of the Argentinean interconnected transmission system. The power system simulation software PSS®SINCAL is used to for the analysis of distance relays operation and settings.