A New Method for Continuation Power Flow

The complete PV curves can be got by continuation power flow method. It is a powerful tool for voltage stability study. But the amount of calculation is large and calculation time is long. The proposed algorithm based on the fast decoupled power flow method brings in a changing load parameter and increases one-dimensional equation in order to eliminate the singularity phenomena at the critical point. Lagrange interpolation method is used to start the algorithm. It can get to the tipping point fast. Then the continuation power flow method based on fast decoupled method is used to get complete PV curves. Algorithm provides two ways to start continuation power flow method. The results of examples show that the two ways can get complete PV curves fast. Prediction steps and computing time are greatly reduced. The validity and practicability of the algorithm are verified.