Linear Solver for Electromagnetic Simulation of General Distribution Feeders

Conference · Tue Jul 01 04:00:00 EDT 2025

DOI:https://doi.org/10.1109/PESGM52009.2025.11225148· OSTI ID:3001780

Choi, Jongchan ^[1]; Xue, Yaosuo ^[1]

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1. ORNL

High-fidelity electromagnetic transient (EMT) modeling is required for accurate simulation and analysis of power system dynamics in modern distribution feeders. However, the high-fidelity of EMT models often leads to significant computational challenges, particularly in terms of computational resources and simulation time. This paper investigates the development and application of a detailed EMT model for general distribution feeders, with a focus on improving computational efficiency. A direct linear solver is proposed for a bordered block diagonal (BBD) matrix structure commonly encountered in a EMT model of distribution feeders. The solver integrates the Schur complement method with the block tridiagonal matrix algorithm to enhance the computational performance. The proposed solver is validated using the primary feeder of the IEEE 342-node test system, demonstrating its accuracy and efficiency in EMT simulations. Furthermore, the solver’s performance is benchmarked against MATLAB’s built-in linear solvers, showing significant improvements in computation time while maintaining high fidelity and accuracy in simulation results.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Electricity Delivery and Energy Reliability (OE); USDOE
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 3001780
• Country of Publication: United States
• Language: English