A comparative study of DC and AC microgrids in commercial buildings across different climates and operating profiles

Fregosi, Daniel; Ravula, Sharmila; Brhlik, Dusan; Saussele, John; Frank, Stephen; Bonnema, Eric; Scheib, Jennifer; Wilson, Eric

doi:10.1109/icdcm.2015.7152031

Cited by 116 publications

(81 citation statements)

References 2 publications

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“…A highlight of the Bosch DC power system configuration is that maximum power point tracking (MPPT) is not performed directly after the PV array, but rather at the AC/DC gateway converter, allowing for higher system efficiency. (Fregosi et al 2015) Eindhoven HTC Netherlands Philips has implemented a grid-connected, PV-powered DC test bed installation for an office LED lighting system at the Eindhoven (Netherlands) High Tech Campus, and compared its energy performance against an equivalent AC system. The site has demonstrated 2% electricity savings and 5% potential savings for the DC system.…”

Section: And Dc/ac Hybrid Zne Building Microgrid Systemsmentioning

confidence: 99%

Direct Current as an Integrating Platform for ZNE Buildings with EVs and Storage: DC Direct Systems – A Bridge to a Low Carbon Future?

Brown

Johnson

Vossos

et al. 2016

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Cost effective zero net energy (ZNE) schemes exist for many types of residential and commercial buildings. Yet, today's alternating current (AC) based ZNE designs may be as much as 10% to 20% less efficient, more costly, and more complicated than a design based on direct current (DC) technologies. An increasing number of research organizations and manufacturers are just starting the process of developing products and conducting research and development (R&D) efforts. These early R&D efforts indicate that the use of DC technologies may deliver many energy and non-energy benefits relative to AC-based typologies. DC ZNE schemes may provide for an ideal integrating platform for natively DC-based onsite generation, storage, electric vehicle (EV) charging and end-use loads. Emerging empirical data suggest that DC enduse appliances are more efficient, simpler, more durable, and lower cost. DC technologies appear to provide ratepayers a lower cost pathway to achieve resilient ZNE buildings, and simultaneously yield a plethora of benefits.

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Section: And Dc/ac Hybrid Zne Building Microgrid Systemsmentioning

confidence: 99%

Direct Current as an Integrating Platform for ZNE Buildings with EVs and Storage: DC Direct Systems – A Bridge to a Low Carbon Future?

Brown

Johnson

Vossos

et al. 2016

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“…The AC/DC converter performs the voltage regulation of the DC bus voltage according to a maximum power point tracking (MPPT) algorithm for the PV generator. In contrast with the conventional microgrid configuration, the MPPT converter, is not in the path from PV to load, which enables higher efficiency and higer reliability than systems using a dedicated MPPT converter [21]. The analysis showed that the system can improved PV energy utilization up to 8%.…”

Section: Variable DC Bus Voltage Distribution Systemsmentioning

confidence: 99%

An overview of low voltage DC distribution systems for residential applications

Rodriguez-Diaz

Savaghebi

Vasquez

et al. 2015

2015 IEEE 5th International Conference on Consumer Electronics - Berlin (ICCE-Berlin)

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The concept of a microgrid has drawn the interest of research community in recent years. The most interesting aspects are the integration of renewable energy sources and energy storage systems at the consumption level, aiming to increase power quality, reliability and efficiency. On top of this, the increasing of DC-based loads has re-open the discussion of DC vs AC distribution systems. As a consequence a lot of research has been done on DC distribution systems and its potential for residential applications. This paper presents an overview of the LVDC distribution systems used in residential applications. Several publications that study the potential energy savings and overall advantages of the LVDC distribution systems are analysed. Different power architectures and topologies are discussed. The existing demonstration facilities where LVDC distribution systems have been implemented are also shown.

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“…However, load variation was not considered for this study. The authors of [21] discussed the comparison of AC and DC systems with the inclusion of solar PV. They concluded that the DC system utilized solar energy was better than the AC system.…”

Section: Introductionmentioning

confidence: 99%

Efficiency Comparison of AC and DC Distribution Networks for Modern Residential Localities

et al. 2019

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The paper investigates the system efficiency for power distribution in residential localities considering daily load variations. Relevant system modeling is presented. A mathematical model is devised, which is based on the data from the Energy Information Administration (EIA), USA, for analysis. The results reveal that the DC distribution system can present an equivalent or even better efficiency compared to the AC distribution network with an efficiency advantage of 2.3%, averaged over a day. Furthermore, the distribution systems are compared under various capacities of solar PV accounting for the effect of variation in solar irradiation over time.

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A comparative study of DC and AC microgrids in commercial buildings across different climates and operating profiles

Cited by 116 publications

References 2 publications

Direct Current as an Integrating Platform for ZNE Buildings with EVs and Storage: DC Direct Systems – A Bridge to a Low Carbon Future?

Direct Current as an Integrating Platform for ZNE Buildings with EVs and Storage: DC Direct Systems – A Bridge to a Low Carbon Future?

An overview of low voltage DC distribution systems for residential applications

Efficiency Comparison of AC and DC Distribution Networks for Modern Residential Localities

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