In electromagnetic transient (EMT) simulation, 80–97% of the computational time is devoted to solving the network equations. A key observation is that the sub-matrix representing the interaction between two far-away… Click to show full abstract
In electromagnetic transient (EMT) simulation, 80–97% of the computational time is devoted to solving the network equations. A key observation is that the sub-matrix representing the interaction between two far-away groups of buses is usually sparse and can be approximated by a low-rank matrix. Based on this observation, we propose a novel low-rank approximation method which permits
               
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