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arXiv · 1405.1385

Quasi Steady-State Model for Power System Stability: Limitations, Analysis and a Remedy

Xiaozhe Wang·Hsiao-Dong Chiang
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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.

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Xiaozhe Wang, Hsiao-Dong Chiang. 2014-05-06. Quasi Steady-State Model for Power System Stability: Limitations, Analysis and a Remedy. https://arxiv.org/abs/1405.1385

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