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An Analysis and Optimization of the Battery Capacity Difference Tolerance of the Modular Multi-Level Half-Bridge Energy Storage Converter.
- Source :
- Energies (19961073); Dec2023, Vol. 16 Issue 23, p7789, 22p
- Publication Year :
- 2023
-
Abstract
- As a power converter of battery energy storage, the multi-level converter and its battery balancing control have received much attention from scholars. This paper focuses on the modular multi-level half-bridge energy storage converter (MMH-ESC), including its topology, working principle, and pulse width modulation (PWM) methods. Under the battery balancing control strategy based on level-shifted carrier PWM (LS-PWM), formulas are derived and calculations are performed to get the charge or discharge of each submodule (SM), thereby obtaining the tolerance for capacity differences among these batteries. A range of battery capacity values that can maintain a balanced state is provided to enhance flexibility in battery configuration and utilization, avoiding the limitation of all batteries to the same capacity. Finally, a new bridge arm modulation wave allocation method is proposed. This method significantly expands the range of SM battery capacity selection and provides a high-tolerance modulation method for the converter under extreme or even fault conditions. [ABSTRACT FROM AUTHOR]
- Subjects :
- ENERGY storage
PULSE width modulation
ELECTRIC batteries
STORAGE batteries
Subjects
Details
- Language :
- English
- ISSN :
- 19961073
- Volume :
- 16
- Issue :
- 23
- Database :
- Complementary Index
- Journal :
- Energies (19961073)
- Publication Type :
- Academic Journal
- Accession number :
- 174115663
- Full Text :
- https://doi.org/10.3390/en16237789