A Method for Identification of Vulnerable Lines in Power System and Prevention of Cascading Failures
A technology for power systems and cascading failures, applied in fault locations, circuit devices, AC network circuits, etc., can solve the problems of increased large-scale load loss and power failure risks that cannot be ignored, achieve good identification accuracy and effectiveness, reduce The effect of blackout risk and probability of blackout
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[0039] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0040] A method for identifying vulnerable lines in a power system, comprising the following steps:
[0041] Step 1: Transform the complex power network into a two-way weighted dual graph;
[0042] The nodes in the dual graph represent the transmission lines in the power grid, and each edge corresponds to the state-dependent connection between the transmission lines; a correlation matrix ΔP is established to reflect the topological connection and electrical correlation of the transmission lines.
[0043]
[0044] In the formula: n is the number of transmission lines, u and v are the numbers of transmission lines, and u, v∈{0,1,2…n}, corresponding to the node numbers in the dual graph, Δp uv Because of the transmission line L u Transmission line L caused by disconnection v , and set it as the weight of the edge u→v in the dual graph.
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