Transient Stability Boundary Visualization for Power System

In terms of monitored operational information, a visual transient stability assessment (TSA) approach is presented to power system. In the procedure, the initial high-dimensional operation data points are projected into an intuitively understandable graphical representation with two-dimensional visualization. Moreover, the data with different operation states are divided into two clusters. One is the stable cluster, and the other is the unstable cluster. Consequently, the operation points and the stability boundary can be strongly apparent on the two-dimensional displays after the mapping. In order to improve the performance of visualization, some data compression techniques are applied in the paper. To an unseen operation point, its status could be decided easily and quickly according to the boundary and its position in the projected space. The proposed method is designed to be applicable for any power system. The assessments of the transient stability for the IEEE 10-machine 39-bus system and a real large-scale power system, 4267-bus State Grid of China system, are used to demonstrate the validity of the approach.