Abstract:

For Hopf bifurcation at equilibrium point in wind power system, Hopf bifurcation point was calculated based on the continuation method; the type of Hopf bifurcation was determined by the parsing algorithm in the wind power system with static var compensator; the effect of reactive power and static var compensator on voltage stability were analyzed in the wind power system. In order to eliminate Hopf bifurcation, the linear feedback control method to control Hopf bifurcation was presented. The results show that the increase of reactive power in wind power system causes Hopf bifurcation; static var compensator can compensate reactive power to delay Hopf bifurcation and improve the system voltage stability region; and the linear feedback control method effectively  eliminates Hopf bifurcation of the wind power system.

Key words: wind power system, Hopf bifurcation, static var compensation, linear feedback, voltage stability