Simulation Acceleration of High-Fidelity Nonlinear Power Electronic Circuits Using Model Order Reduction

In this paper, we present a Model Order Reduction (MOR) framework to enhance the simulation speeds of switched high-fidelity power electronic circuits with nonlinear inductors. The nonlinear inductor is modeled as a piecewise linear element. The problem of prohibitively slow speeds of the simulation caused due to the wide span of the eigenvalues is mitigated by implementing the proposed framework. Dynamics of the original stiff system is approximated by a nonstiff reduced order system by retaining the dominant modes of the system. The method is demonstrated on a DC-DC boost converter with a saturated inductor. Significant improvements in simulation speed and considerable reduction in size of the solution arrays is achieved. (C) 2018, IFAC (International Federation of Automatic Control) Hosting by Elsevier Ltd. All rights reserved.