Identifying the Key Transmission Lines Considering the Power Flow Impact Force

A method is proposed for identifying the key transmission lines of a power grid. First, based on the theory of equal phase angle line and electrical distance, the phase angle partition areas are defined to partition the transmission lines. A generalized entropy index of the power flow growth rate is defined to evaluate the distribution of the degree of imbalance of the power flow impact after a transmission line outage. Second, based on the Katz-Bonacich Center theory, an index for evaluating the importance of the location of transmission lines is defined. Finally, the cloud model is used to transform the evaluation data information. The comprehensive evaluation results are presented in the form of cloud maps. The correctness of this method is verified by simulation.