Abstract
The complexity in simulating power electronics, such as modular multilevel converters (MMCs), requires simulation algorithms to speed up the process. Existing simulation algorithms exploit spatial parallelism to speed up the simulation. With the rise in the complexity of power electronics and the presence of an increased number of states within them, there are limits in the speedup using spatial parallelism. In this article, a temporal parallelism algorithm based on parallel-in-Time methods is developed for simulation of power electronics systems. The temporal parallelism algorithm is based on the computation of power electronics states on coarse and fine time steps using different models. The models of power electronics systems used in coarse and fine time steps are average-value and detailed models, respectively. The updates to states on coarse time step are computed serially and are used to initialize the states on the fine time step. The updates on fine time step are computed in parallel. A translation method is proposed in this article to update the states on fine time step from the simulations in the coarse time step, and vice versa. The proposed algorithm is applied to simulate MMCs and is validated with respect to a detailed reference MMC model. The proposed algorithm recorded a speedup of up to 3.47 \times with five cores.
Original language | English |
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Article number | 8879570 |
Pages (from-to) | 4100-4108 |
Number of pages | 9 |
Journal | IEEE Journal of Emerging and Selected Topics in Power Electronics |
Volume | 8 |
Issue number | 4 |
DOIs | |
State | Published - Dec 2020 |
Funding
Manuscript received May 30, 2019; revised August 29, 2019; accepted September 22, 2019. Date of publication October 22, 2019; date of current version November 5, 2020. This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-publicaccess-plan). Recommended for publication by Associate Editor Margarita Norambuena.
Keywords
- Electromagnetic transient (EMT) simulation
- multigrid reduction in time (MGRIT)
- nonlinear nonautonomous switched systems
- parallel-in-Time
- temporal parallelism