The effect of load shedding on the constant of dynamic security region critical hyper plane

Due to its specific advantages, the model of probabilistic insecurity index is being applied more and more widely in the security control of power system. Based on the fact that the boundary of DSR can be expressed by hyper plane and the migration law of the hyper plane, lots of emulations on the New England 4-genarator 11-bus system are performed. Through the results of the emulations, it is found that the relationship between DSR hyper plane constant a0 and the amount of load to be shed p is approximately quadratic polynomial. The comparison between the emulation date and fitting curve of the emulation date indicates that this relationship is effective and precise.