The Comprehensive Recognition Method of Critical Lines Based on the Principal Component Analysis

Accurate identification of a few key lines in power system is of great significance to prevent blackout. Traditional key lines are mainly identified by single index such as power grid structure, line load rate and active power of line, which is one-sided. Therefore, in the wide area measurement environment, a multi-dimensional comprehensive identification method of key lines based on principal component analysis is proposed. Firstly, from the aspect of transmission breadth and depth, the utilization index of line is proposed. Secondly, the grid structure, line load rate and line active power index are proposed. Thirdly, based on principal component analysis, a comprehensive identification method of the above four indicators is proposed. Finally, taking the actual power grid as an example, the accuracy of this method is verified by comparing with the traditional method.