Protection Comparative Analysis of Typical Phase-Shifting Transformers

Abstract

There are many kinds of phase-shifting transformer (PST) because of the wide variety of applications. Therefore, the differential protection of the PST are different. This paper analyzes the differential protection of PST and sum up the typical type of it. Based on two fundamental differential protection principles, this paper proposes a series of differential protection configuration for typical PST. The protection scope, fault type and matching relation of different protection are analyzed base on theoretical analysis and RTDS simulation.