Abstract
The integration of hybrid photovoltaic (PV) and energy storage system (ESS) based plants has become a promising way of solving the intermittency of PV plants and providing frequency support to the power grid. The multi-port autonomous reconfigurable solar power plant (MARS) can integrate the PV systems and ESSs to an ac grid and dc lines. The proposed isolated MARS incorporates an isolated converter that connects to the PV arrays and is based on the dual active bridge (DAB) converter. The high frequency switching in the DAB and the means to control the DAB converter using delays between switching signals lead to the need for a small timestep in simulations. Moreover, several hundreds of modules that include a DAB converter are present in the MARS. The small timestep and the presence of several hundreds of modules lead to a significant rise in the overall simulation time. To address this issue, simulation algorithms like numerical stiffness-based hybrid discretization and the hysteresis relaxation technique are applied to the switched system model of isolated MARS. Additionally, an event-driven interpolating method is introduced to help increase the minimum timestep to simulate the conventional DAB converter model while maintaining high accuracy in the simulation results. The developed model is validated by comparison with its reference model built in the PSCAD/EMTDC and MATLAB software environments using library components.
| Original language | English |
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| Title of host publication | Proceedings of the 2021 IEEE 12th International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2021 |
| Editors | Sudip K. Mazumder, Juan Carlos Balda, Lina He, Jianzhe Liu, Ankit Gupta |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| ISBN (Electronic) | 9780738142371 |
| DOIs | |
| State | Published - Jun 28 2021 |
| Event | 12th IEEE International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2021 - Virtual, Online Duration: Jun 28 2021 → Jul 1 2021 |
Publication series
| Name | Proceedings of the 2021 IEEE 12th International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2021 |
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Conference
| Conference | 12th IEEE International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2021 |
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| City | Virtual, Online |
| Period | 06/28/21 → 07/1/21 |
Funding
This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-EE0002064 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-public-access-plan). Research sponsored by Solar Energy Technologies Office of U.S. Department of Energy. This material is based upon work supported by the U.S. Department of Energy's Office of Energy Efficiency and Renewable Energy (EERE) under the Solar Energy Technologies Office Award Number 34019. The views expressed herein do not necessarily represent the views of the U.S. Department of Energy or the United States Government.
Keywords
- Electromagnetic transient (EMT) simulation
- MMC
- event-driven simulation
- numerical stiffness