Power sharing in hybrid microgrids with multiple DC subgrids

Eisapour-Moarref, Amir; Kalantar, Mohsen; Esmaili, Masoud

doi:10.1016/j.ijepes.2020.106716

Cited by 8 publications

(4 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It can be noticed that although both PnP capability and global closed-loop stability of clustered MGs are guaranteed, the realization of optimal power-sharing and the minimization of power losses are not considered in this study. The researchers of [40] suggest a new harmonic-based control technique to control hybrid AC/DC sub-grids. In this study, bidirectional DC-DC converters (BDCs) and parallel bi-directional (ICs) are used to couple DC sub-grids and both sides in the hybrid MGs, respectively.…”

Section: Decentralized Control Methodsmentioning

confidence: 99%

“…Consequently, several studies on DC MG clusters application, stability, and control aspects have been performed, covering voltage regulation [39], power-sharing control [31,40,41], and the state-of-charge (SOC) balancing of batteries [42]. In addition, an increasing number of research works have been performed to address comprehensive review, particularly on the control, protection, and application of DC MGs [16,35,38,[43][44][45][46].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Control Strategies of DC Microgrids Cluster: A Comprehensive Review

et al. 2021

View full text Add to dashboard Cite

Multiple microgrids (MGs) close to each other can be interconnected to construct a cluster to enhance reliability and flexibility. This paper presents a comprehensive and comparative review of recent studies on DC MG clusters’ control strategies. Different schemes regarding the two significant control aspects of networked DC MGs, namely DC-link voltage control and power flow control between MGs, are investigated. A discussion about the architecture configuration of DC MG clusters is also provided. All advantages and limitations of various control strategies of recent studies are discussed in this paper. Furthermore, this paper discusses three types of consensus protocol with different time boundaries, including linear, finite, and fixed. Based on the main findings from the reviewed studies, future research recommendations are proposed.

show abstract

Section: Decentralized Control Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Control Strategies of DC Microgrids Cluster: A Comprehensive Review

et al. 2021

View full text Add to dashboard Cite

show abstract

“…On the other hand, research on DC MGs has become relevant given the advancement in the development of DC renewable power generation sources and their inherent advantage for DC loads, such as EVs and ESS, in commercial, industrial, and residential applications [35].…”

Section: A Microgrids Ac/dcmentioning

confidence: 99%

Review of Smart Transformer-Based Meshed Hybrid Microgrids: Shaping, Topology and Energy Management Systems

Posada,

Unsihuay-Vila

et al. 2023

IEEE Access

View full text Add to dashboard Cite

Microgrids are considered an adequate alternative to overcome the challenges involving integrating distributed energy resources in distribution systems to contribute to the 'Three D' trend in the electricity sector, i.e., decentralize, decarbonize, and digitize electricity. This paper reviews the most relevant works to establish a baseline for the advancement and development of smart transformer-based meshed hybrid microgrids and energy management systems. First, the structure of the solid-state transformers as smart transformers and their potential application as an energy router in a microgrid is discussed. Then, the principle of conformation of meshed hybrid microgrids based on a smart transformer and the topologies reported in the literature are reviewed. Finally, power management systems integrated into smart transformers-based meshed hybrid microgrids are studied. According to the findings and conclusions, it is considered that smart transformers-based meshed hybrid microgrids operated by an optimal energy management system under uncertainty are a potentially feasible technological alternative for the adequate penetration of distributed energy resources into local distribution systems.

show abstract

“…During normal operation, energy can flow flexibly via the BIC between the two subgrids [20]. The surplus energy in the AC or DC sectors is adequately utilized for system operation [21,22]. Owing to its inherent advantages, a hybrid system includes AC and DC grid characteristics, which can cater to the demands of various loads and serve as a source of inertia provision.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Grid-Forming Converters Control in Hybrid AC/DC Microgrids Using Bidirectional Virtual Inertia Support

Bakeer,

Chub,

Abid

et al. 2024

Processes

View full text Add to dashboard Cite

This paper presents a new grid-forming strategy for hybrid AC/DC microgrids using bidirectional virtual inertia support designed to address weak grid conditions. The stability of hybrid AC/DC microgrids heavily relies on the AC mains frequency and the DC-link voltage, and deviations in these factors can lead to undesirable outcomes such as load curtailments and power system congestions and blackouts. This paper introduces a unique approach that leverages bidirectional virtual inertia support to enhance the stability and reliability of hybrid AC/DC microgrids under weak grid conditions. The proposed strategy employs virtual inertia as a buffer to mitigate rapid changes in DC-link voltage and AC frequency, thereby enhancing system stability margins. This strategy significantly contributes to a more stable and reliable grid operation by reducing voltage and frequency fluctuations. A standard hybrid AC/DC microgrid configuration is used to implement the bidirectional virtual inertia support, where a bidirectional interlinking converter control is adjusted to deliver inertia support to both the AC and DC subgrids. This converter utilizes the DC grid voltage and AC grid frequency as inputs, effectively managing active power balance and implementing auxiliary functions. Extensive simulations are conducted under weak grid conditions and standalone mode to validate the effectiveness of the proposed strategy. The simulation results demonstrate a remarkable improvement in frequency nadir, rate-of-change-of-frequency (RoCoF), and DC bus voltage deviation in the hybrid AC/DC microgrids. The bidirectional virtual inertia support substantially reduces voltage and frequency fluctuations, enhancing the microgrid stability and resilience. There is an improvement of over 45% and 25% in the frequency deviation and voltage deviation, respectively, achieved through implementing the proposed control strategy.

show abstract

Power sharing in hybrid microgrids with multiple DC subgrids

Cited by 8 publications

References 37 publications

Control Strategies of DC Microgrids Cluster: A Comprehensive Review

Control Strategies of DC Microgrids Cluster: A Comprehensive Review

Review of Smart Transformer-Based Meshed Hybrid Microgrids: Shaping, Topology and Energy Management Systems

Enhancing Grid-Forming Converters Control in Hybrid AC/DC Microgrids Using Bidirectional Virtual Inertia Support

Contact Info

Product

Resources

About