The Impact of Two-Terminal Traveling Wave-Based Transmission Line Protection in the Distribution Power System Voltage Sag

Rafael Lucas da Silva França¹; Flávio Bezerra Costa¹; Francisco Canindé da Silva Júnior¹; Daniel Marques da Silva¹

¹ UFRN

Resumo

A fast protection method increases the power system reliability, decreases costs and can mitigate power quality (PQ) problems, such as voltage sag. This paper evaluates and compares the voltage sag behavior in a distribution subsystem due the distance protection and the two-terminal traveling wave-based transmission line protection performance. The tested power system is based in the IEEE 230 kV transmission power system and in the IEEE 30 bus power system, and contains a transmission, sub-transmission, and distribution systems. In order to provide more reliable data, the power system lines were modeled at distributed parameters. The results were obtained by means of computational simulation and indicate that a fast protection can significantly decreases the voltage sag intensity.

Palavras-chave: Power quality; Voltage sag mitigation; IEEE power system; Transmission line protection; Traveling waves