A flexible power management strategy for PV-battery based interconnected DC microgrid
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Mrutunjaya Panda
Abstract
In this paper, a coordinated power-sharing strategy for interconnected DC-microgrid (DC-MG) is proposed. The DC-MG consists of two subgrids with an interlinking bidirectional DC/DC converter (IBDDC). Each subgrid has a secondary-1 controller based on a state of charge (SoC) balancing based droop control strategy of the battery unit (BU). The proposed droop strategy regulates the DC bus voltage according to the SoC of BU. With the SoC balancing based droop method, BU with higher SoC supplies more power to the microgrid (MG) as compared to low SoC BU. The SoC information of batteries in all subgrids is communicated through low bandwidth communication (LBC). In case of failure of LBC, a secondary-2 controller is implemented for the battery controller to regulate the DC bus voltage considering the SoC of BU. Secondary-2 does not depend on the communication line. Considering the levels of DC bus voltages, a secondary power regulating controller is introduced for IBDDC. Further, a coordinated power control strategy is proposed for distributed generation to avoid overcharging of batteries. The whole system operates in a distributed way without a central controller. The proposed strategy has been verified in MATLAB/Simulink.
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Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
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Research funding: This work was supported by “Woosong University’s Academic Research Funding – 2021”.
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Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
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© 2021 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
- Frontmatter
- Research Articles
- Pre-diagnosis technology for short-circuit withstand capability of distribution transformer based on big data
- Residual flux impact in controlled switching of HVDC converter transformer
- A novel transient search optimization for optimal allocation of multiple distributed generator in the radial electrical distribution network
- Characterization of nano-additive filled epoxy resin composites (ERC) for high voltage gas insulated switchgear (GIS) applications
- An intelligent approach towards very short-term load forecasting
- Allocation of active power losses to generators in electric power networks
- Optimization of controller gains to enhance power quality of standalone wind energy conversion system
- A flexible power management strategy for PV-battery based interconnected DC microgrid
- Slow flow solutions and stability analysis of single machine to infinite bus power systems
Articles in the same Issue
- Frontmatter
- Research Articles
- Pre-diagnosis technology for short-circuit withstand capability of distribution transformer based on big data
- Residual flux impact in controlled switching of HVDC converter transformer
- A novel transient search optimization for optimal allocation of multiple distributed generator in the radial electrical distribution network
- Characterization of nano-additive filled epoxy resin composites (ERC) for high voltage gas insulated switchgear (GIS) applications
- An intelligent approach towards very short-term load forecasting
- Allocation of active power losses to generators in electric power networks
- Optimization of controller gains to enhance power quality of standalone wind energy conversion system
- A flexible power management strategy for PV-battery based interconnected DC microgrid
- Slow flow solutions and stability analysis of single machine to infinite bus power systems
