Study of dynamic voltage stability of power systems

摘要

A model of power system with load dynamics is studied to investigated the voltage collapse phenomenon. The reactive power demand at a load bus is slowly increased until the voltage magnitude sharply falls to a very low Level. This is caused by saddle node bifurcation. This is also steady state voltage instability or collapse. However. As The reactive power load is increased slowly from a small value, initially the eigenvalues which were in the left half s-plane move to the right half s-plane an again return to the left half plane.