Dynamic load shedding based on transient energy margin sensitivity

Abstract

This paper described a new approach for assessing dynamic load shedding amount of bulk power systems. It proposed a fast algorithm to estimate dynamic load shedding amount based on the transient energy margin sensitivity and the power flow distribution factor. The transient energy margin sensitivities are highly significant in quick determination of stability limits. The power flow distribution factors can be used for fast computation of line flow limits. The method calculated load shedding amount by means of comparing interface on-line flows and interface flow limits in an emergency in real-time monitoring. Tests on power systems had proven that this method yielded dynamic load shedding amounts rapidly and efficiently. This paper provided an effective method to solve the dynamic load shedding problem.