Article Dans Une Revue IEEE Transactions on Power Electronics Année : 2025

Circuit-to-Circuit Cosimulation for Closed-Loop Electrical Systems Using Waveform Relaxation

Résumé

A computational time saving approach is proposed for the co-simulation of a buck-boost converter using waveform relaxation (WR) and time windowing. This study implements the Gauss-Seidel (GS) method, an iterative process that is employed to solve systems of linear and nonlinear equations using the WR technique, improving the convergence speed and accuracy of closed-loop system dynamic simulations. The proposed technique is applied to a 3.3 V buck-boost converter working both in buck and boost modes, therefore, simulations and measurements are carried out with a 1.8 to 5.5 V input voltage range. A comparative analysis between GS-WR without and with time windowing demonstrates that with time windowing, the number of iterations increases by 60% and 67.8%, while the elapsed time is reduced by 22.3% and 26.6% with respect to a single time windows in buck and boost modes, respectively. Moreover, the optimal number of time windows (i.e., 4), computed by simulation, yields a 8.1% and 18.1% faster simulation time compared to the highest considered value in the study (i.e., 10). The outcome of this comparison reveals that a higher number of time windows does not necessarily result in a quicker computation compared to a lower value. More specifically, the GS-WR technique was found to be the main contributor to the acceleration, while time windowing ensures the convergence to the same results as the full system simulation.

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Dates et versions

hal-05033631 , version 1 (14-04-2025)

Identifiants

Citer

Md Moktarul Alam, Mohsen Koohestani, Mohammed Ramdani, Richard Perdriau. Circuit-to-Circuit Cosimulation for Closed-Loop Electrical Systems Using Waveform Relaxation. IEEE Transactions on Power Electronics, 2025, 40 (6), pp.8553-8565. ⟨10.1109/TPEL.2025.3541430⟩. ⟨hal-05033631⟩
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