Bulk Power System Voltage Phenomena { Iii Seminar

This paper illustrates transcritical and Hopf bifurcations in a realistic ac/dc power system model. These bifurcations are thoroughly analyzed based on bifurcation theory to understand and characterize their e ect on the dynamic behavior of the system, particularly on voltage stability. A new technique to trace transcritical bifurcations diagrams is proposed, based on the generic characteristic of saddle-node bifurcations for constant P load changes, as demonstrated in the paper. Control mechanisms for avoiding the bifurcations are also presented. Finally, the paper discusses the computational requirements for studying possible chaotic behavior due to bifurcations on the system limit cycles.