  In this paper, pseudo-transient continuation method has been modified and
implemented in power system long-term stability analysis. This method is a
middle ground between integration and steady state calculation, thus is a good
compromise between accuracy and efficiency. Pseudo-transient continuation
method can be applied in the long-term stability model directly to accelerate
simulation speed and can also be implemented in the QSS model to overcome
numerical difficulties. Numerical examples show that pseudo-transient
continuation method can provide correct approximations for the long-term
stability model in terms of trajectories and stability assessment.
