In power system analysis, the Equal Area Criterion is of great importance on revealing the condition for a grid-connected synchronous generator to maintain its transient rotor angle stability with the grid under a large disturbance. At present, the increasing renewable distributed energy resources (DERs) are introducing a variety of new nonlinear characteristics that are different from those of conventional generation although these DERs can still be operated and modeled as grid-connected oscillators with synthetic inertias. To study stability and synchronism of a grid-connected DER operated as a more general nonlinear oscillator, this paper proposes a Generalized Equal Area Criterion for estimation of transient stability margin subject to a large disturbance.
@article{arxiv.2003.03228,
title = {Generalized Equal Area Criterion for Stability Analysis of Nonlinear Oscillators},
author = {Xin Xu and Kai Sun},
journal= {arXiv preprint arXiv:2003.03228},
year = {2020}
}