Critical clearing time evaluation of power system with UPFC by energetic method

Abstract EN

This paper describes the use of direct method based on energy function type Lyapunov to evaluate the Critical Clearing Time (CCT) of power system subjected to large contingencies.

The two axes model of generator with speed and excitation regulation systems is considered in this study.

The power system model takes in consideration the presence of a Unified Power Flow Controller (UPFC).

An energy function is constrained for the detailed model with UPFC.

The performance of the Potential Energy Boundary Surface (PEBS) based on the proposed energy function, under different disturbances and loading conditions, is investigated for IEEE 3-machines 9-bus test system.

The obtained results show the capability of the proposed approach to evaluate the CCT.