An effective sim ulation ofdynam icpowersystem m odels ism ade via staticpow ersystem m odel. Itm akesthestatic pow er system m odel and the dynam ic one have the sam e saddle node bifurcation point. Under the condition of suitable form ulation, the voltage collapse point and the left eigenvector ofthe dynam ic pow er system can be obtained by m eans of static pow er system m odel. The norm alvector to the bifurcation setis preferred to be used in optim um system controlnear bifurcation. The Lanczos m ethod is used to obtain its eigenvalue and eigenvector. The com putations show that Lanczos m ethod has a higherprecision and efficiency than the conventionalconverse iteration m ethod.