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Hybrid Electric Springs for Grid-Tied Power Control and Storage Reduction in AC Microgrids.
- Source :
- IEEE Transactions on Power Electronics; Apr2019, Vol. 34 Issue 4, p3214-3225, 12p
- Publication Year :
- 2019
-
Abstract
- The renewable generations (RGs) are conventionally interfaced with the utility grid through battery energy storage systems (BESS). In this cascaded configuration of the grid-connected inverter, battery, and RG, the power of the battery is passively governed by the power difference between the RG and the grid. This compromises the state-of-charge (SoC) control of the battery and increases the storage capacity. To address this issue, a hybrid electric spring (HES), which is integrated with the RG and noncritical load (NCL), is proposed in this paper for the grid-tied power control and reduction of battery storage capacity in ac microgrids. Such an integrated configuration enables a flexible control of the power flow among battery, NCL, and grid. On top of that, the proposed HES can achieve an extended operating region of grid-tied power control compared with the conventional BESS and the existing electric springs. The operating principle, steady-state analysis, and control design of the HES are discussed. The functions of the grid-tied power control and battery SoC control are verified experimentally and through simulations. [ABSTRACT FROM AUTHOR]
- Subjects :
- SYSTEMS on a chip
MICROGRIDS
Subjects
Details
- Language :
- English
- ISSN :
- 08858993
- Volume :
- 34
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Power Electronics
- Publication Type :
- Academic Journal
- Accession number :
- 135356445
- Full Text :
- https://doi.org/10.1109/TPEL.2018.2854569