Quasi Steady-State Model for Power System Stability: Limitations, Analysis and a Remedy
Abstract
The quasi steady-state (QSS) model tries to reach a good compromise between accuracy and efficiency in long-term stability analysis. However, the QSS model is unable to provide correct approximations and stability assessment for the long-term stability model consistently. In this paper, some numerical examples in which the QSS model was stable while the long-term stability model underwent instabilities are presented with analysis in nonlinear system framework. At the same time, a hybrid model which serves as a remedy to the QSS model is proposed according to causes for failure of the QSS model and dynamic mechanisms of long-term instabilities. Numerical examples are given to show that the developed hybrid model can successfully capture unstable behaviors of the long-term stability model while the QSS model fails.
Keywords
Cite
@article{arxiv.1405.1385,
title = {Quasi Steady-State Model for Power System Stability: Limitations, Analysis and a Remedy},
author = {Xiaozhe Wang and Hsiao-Dong Chiang},
journal= {arXiv preprint arXiv:1405.1385},
year = {2014}
}
Comments
The paper has been accepted by Power Systems Computation Conference 2014