Identification Of Key Lines In Complex Power Grid Based On Transmission Importance Degree

For the purpose of improving the efficiency of on key line identification of complex power grid, this paper puts forward a method based on the importance of transmission. The application of this method is held up by complex network theory and the maximum flow problem of networks, and the paper introduces the Power Transfer Distribution Factor (PTDF) to define the line transmission importance; The author further establishes the weighted influence of the power transmission at each power load nodes on the power network, and integrated transmission degree and weight to come up with the key line criterion. This criterion takes into account not only the topological structure of power network, and simplifies the network into a directed more in line with the actual situation of the power system. The simulation in the IEEE39 system and the analysis of the results verify the effectiveness of the method.