Title :
Quasi steady-state model for power system stability: Limitations, analysis and a remedy
Author :
Xiaozhe Wang ; Hsiao-Dong Chiang
Author_Institution :
Cornell Univ., Ithaca, NY, USA
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 :
nonlinear systems; power system simulation; power system stability; long-term stability analysis; nonlinear system framework; power system stability; quasi steady-state model; Analytical models; Computational modeling; Numerical models; Numerical stability; Power system stability; Stability criteria; hybrid model; long-term stability model; nonlinear analysis; power system long-term stability; quasi steady-state model;
Conference_Titel :
Power Systems Computation Conference (PSCC), 2014
Conference_Location :
Wroclaw
DOI :
10.1109/PSCC.2014.7038362