Modern Techniques for Power Swing Detection and Classification - A Review

Abstract

Power swing is a transient event in the power system that is incepted by various phenomenons such as sudden
loss or sudden addition of load, tripping of line due to faults etc. The conventional Distance relays are set to
operate for faults may mal-operate during Power swings which lead to transient instability of the system along
with low post fault power transfer capability of the system. To avoid this, a fast acting Power swing detection is
required that would issue appropriate tripping signals to the breaker so that post fault power transfer capability is
optimized. This paper aims to present modern techniques that reliably and efficiently detect power swing and
classify the same into fast or slow and stable or unstable class to avoid false tripping of breakers and ensure
maximum post fault power transfer.