Online optimization of a multi-conversion-level DC home microgrid for system efficiency enhancement

Boscaino, V.; Guerrero, Josep M.; Ciornei, Irina; Meng, Lexuan; Sanseverino, Eleonora Riva; Zizzo, Gaetano

doi:10.1016/j.scs.2017.08.014

“…Basic mechanisms for prioritization and power allocation are also needed; these can build on capabilities already present in USB and Ethernet. For systems with multiple parallel stepdown converters, an efficiency optimization algorithm that regulates current between the converters could be used to optimize the system efficiency [50]. See Figure 4 for a conceptual schematic of this proposed configuration.…”

Section: Office Worktationsmentioning

confidence: 99%

Adoption Pathways for DC Power Distribution in Buildings

Vossos

¹

,

Gerber

²

,

Gaillet-Tournier

³

et al. 2022

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Driven by the proliferation of DC energy sources and DC end-use devices (e.g., photovoltaics, battery storage, solid-state lighting, and consumer electronics), DC power distribution in buildings has recently emerged as a path to improved efficiency, resilience, and cost savings in the transitioning building sector. Despite these important benefits, there are several technological and market barriers impeding the development of DC distribution, which have kept this technology at the demonstration phase. This paper identifies specific end-use cases for which DC distribution in buildings is viable today. We evaluate their technology and market readiness, as well as their efficiency, cost, and resiliency benefits while addressing implementation barriers. The paper starts with a technology review, followed by a comprehensive market assessment, in which we analyze DC distribution field deployments and their end-use characteristics. We also conduct a survey of DC power and building professionals through on-site visits and phone interviews and summarize lessons learned and recommendations. In addition, the paper includes a novel efficiency analysis, in which we quantify energy savings from DC distribution for different end-use categories. Based on our findings, we present specific adoption pathways for DC in buildings that can be implemented today, and for each pathway we identify challenges and offer recommendations for the research and building community.

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“…Basic mechanisms for prioritization and power allocation are also needed; these can build on capabilities already present in USB and Ethernet. For systems with multiple parallel step-down converters, an efficiency optimization algorithm that regulates current between the converters could be used to optimize the system efficiency [45]. For open office spaces, bringing power down from the ceiling or up from the underfloor to a collection of adjacent workstations can be convenient.…”

Section: Office Worktationsmentioning

confidence: 99%

Adoption Pathways for DC Power Distribution in Buildings

Vossos¹,

Gerber²,

Gaillet-Tournier³

et al. 2021

Preprint

2

0

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Driven by the proliferation of DC energy sources and DC end-use devices (e.g., photovoltaics, battery storage, solid-state lighting, and consumer electronics), DC power distribution in buildings has recently emerged as a path to improved efficiency, resilience, and cost savings in the transitioning building sector. Despite these important benefits, there are several technological and market barriers impeding the development of DC distribution, which have kept this technology at the demonstration phase. This paper identifies specific end-use cases for which DC distribution in buildings is viable today. We evaluate their technology and market readiness, as well as their efficiency, cost, and resiliency benefits while addressing implementation barriers. The paper starts with a technology review, followed by a comprehensive market assessment, in which we analyze DC distribution field deployments and their end-use characteristics. We also conduct a survey of DC power and building professionals through on-site visits and phone interviews and summarize lessons learned and recommendations. In addition, the paper includes a novel efficiency analysis, in which we quantify energy savings from DC distribution for different end-use categories. Based on our findings, we present specific adoption pathways for DC in buildings that can be implemented today, and for each pathway we identify challenges and offer recommendations for the research and building community.

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“…The voltage control issue is discussed in [3], where the authors propose an energy management strategy of active distribution systems with a grid-connected DC microgrid, as well as for an isolated DC microgrid with hybrid energy resources. In [4], a power architecture for residential buildings consisting in a multilevel DC microgrid is presented, together with a method for maximizing the energy efficiency of parallel DC/DC converters. In [5], a microgrid based on solar PV-battery energy storage with a multifunctional voltage source converter is presented.…”

Section: Introductionmentioning

confidence: 99%

A General Methodology for Short-circuit Calculations in Hybrid AC/DC Microgrids

Favuzza

¹

,

Mitolo²,

Moradi

³

et al. 2023

IEEE Trans. on Ind. Applicat.

2

0

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In this paper, the issues related to short-circuit calculations in hybrid AC/DC microgrids are discussed. The reference standard for short-current calculations in DC systems is the IEC 61660, which provides a mathematical formulation of the problem. The standard only includes radial DC grids and does not consider a more complex system, such as meshed DC systems or a hybrid AC/DC microgrid. This paper proposes a generalized approach that can be used independently of the characteristics of the hybrid system. The proposed approach is applied to four test microgrids with different distributed sources and number of nodes and the results are compared with those obtained simulating the same grids with Neplan 360 ® .

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Online optimization of a multi-conversion-level DC home microgrid for system efficiency enhancement

Cited by 13 publications

References 30 publications

Adoption Pathways for DC Power Distribution in Buildings

Adoption Pathways for DC Power Distribution in Buildings

Adoption Pathways for DC Power Distribution in Buildings

A General Methodology for Short-circuit Calculations in Hybrid AC/DC Microgrids

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