A simulation based comparison of AC and DC power distribution networks in buildings

Gerber, Dániel; Vossos, Vagelis; Feng, Wei; Khandekar, Aditya; Marnay, Chris; Nordman, Bruce

doi:10.1109/icdcm.2017.8001107

Cited by 25 publications

(10 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The entropy of each indicator is calculated according to (5). The weight calculation is done according to (7) to get objective weights w 2 .…”

Section: Weights Of Indicatormentioning

confidence: 99%

“…Studies have shown that DC links have smaller losses than AC over long distances . It has been proven that using DC distribution can be considerably more efficient than using AC . The DC power distribution system is also more suitable for DC power supply equipment such as electric vehicles and energy storage equipment because it avoids power conversion between DC and AC effectively.…”

Section: Introductionmentioning

confidence: 99%

“…At present, the research on AC power quality is much more than DC power quality and there are already many evaluation methods for AC power quality. Considering that large‐scale transportation of clean energy is based on DC transmission mostly , and DC power distribution is more efficient than AC power distribution , research on DC power quality has become more and more important.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Synthetic evaluation of DC power quality based on combination weighting

Qingxian³

et al. 2020

IEEJ Transactions Elec Engng

View full text Add to dashboard Cite

With the development of global renewable energy, DC transmission and DC power distribution technology have been applied on a large scale, and the requirements for DC power quality (PQ) are more stringent. Evaluating DC PQ reasonably and effectively has become a research hotspot at this stage. In this paper, a comprehensive analysis for various indexes of DC PQ is conducted to obtain a unified parameter for describing the characteristics of PQ from an overall perspective. First, weight values of PQ indexes are calculated by combining fuzzy analytic hierarchy process (FAHP) and the improved entropy weight method. FAHP can satisfy the consistency without the consistency test, and the improved entropy weight method is an objective weighting method that can effectively avoid the preference of subjective weighting method. Then, based on a triangular fuzzy function, the membership degree is obtained. Finally, a fuzzy comprehensive evaluation is made. An example analysis is carried out with the data provided by the Gree photovoltaic direct‐driven inverter multi‐variable refrigerant flow system to show the validity of the proposed method for evaluating DC PQ. © 2020 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

show abstract

“…The entropy of each indicator is calculated according to (5). The weight calculation is done according to (7) to get objective weights w 2 .…”

Section: Weights Of Indicatormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Synthetic evaluation of DC power quality based on combination weighting

Qingxian³

et al. 2020

IEEJ Transactions Elec Engng

View full text Add to dashboard Cite

show abstract

“…The potential electricity savings from DC distribution systems in buildings have been addressed in numerous studies (AlLee and Tschudi 2012; Backhaus et al 2015;Savage, Nordhaus, and Jamieson 2010;Denkenberger et al 2012;Sannino, Postiglione, and Bollen 2003;Thomas, Azevedo, and Morgan 2012;Garbesi, Vossos, and Shen 2011;Engelen et al 2006;Glasgo 2017;Hammerstrom 2007;Liu and Li 2014;Noritake et al 2015Noritake et al , 2014Paajanen, Kaipia, and Partanen 2009;Starke, Tolbert, and Ozpineci 2008;Willems and Aerts 2014;Gerber et al 2018;Gerber et al 2017;Frank and Rebennack 2015;Weiss, Ott, and Boeke 2015;Boeke and Wendt 2015;Fregosi et al 2015). For the commercial building sector, the reported savings vary widely from 2 percent (Backhaus et al 2015) to as much as 19 percent (Savage, Nordhaus, and Jamieson 2010).…”

Section: Background and Motivationmentioning

confidence: 99%

Efficient and Zero Net Energy-Ready Plug Loads

Meier

Brown

Gerber

et al. 2019

Self Cite

View full text Add to dashboard Cite

This report was prepared as the result of work sponsored by the California Energy Commission. It does not necessarily represent the views of the Energy Commission, its employees or the State of California. The Energy Commission, the State of California, its employees, contractors and subcontractors make no warranty, express or implied, and assume no legal liability for the information in this report; nor does any party represent that the uses of this information will not infringe upon privately owned rights. This report has not been approved or disapproved by the California Energy Commission nor has the California Energy Commission passed upon the accuracy or adequacy of the information in this report.

show abstract

“…As discussed in [2], the most efficient electricity end uses are internally DC. Therefore, similar to the analysis in [17] and [54], and to minimize losses for the DC distribution system, the building model assumes that all electric loads can be supplied directly with DC power. In this sense, the loads are optimally designed such that their internal DC voltage is matched to the distribution.…”

Section: Optimized Load Design For DC Inputmentioning

confidence: 99%

Techno-economic analysis of DC power distribution in commercial buildings

et al. 2018

Self Cite

View full text Add to dashboard Cite

Improvements in building end-use efficiency have significantly reduced the energy intensity of new buildings, but diminishing returns make it a challenge to build very-low energy buildings cost-effectively. A largely untapped efficiency strategy is to improve the efficiency of power distribution within buildings. Direct current (DC) distribution with modern power electronics has the potential to eliminate much of the power conversion loss in alternating current (AC) building distribution networks that include photovoltaics and DC end uses. Previous literature suggests up to 15 percent energy savings from DC power distribution in very energy efficient buildings with onsite generation and battery storage. This paper extends prior energy modeling of DC versus AC distribution in buildings, to consider the cost of implementing DC systems on a life-cycle basis. We present a techno-economic analysis framework that evaluates the cost-effectiveness of DC systems in U.S. commercial buildings, based on commercially available products for various PV and battery storage capacities. We use Monte Carlo simulation to account for uncertainty and variability in the cost inputs, and compute the payback period (PBP) and lifecycle cost (LCC) savings of DC versus AC distribution systems. We also conduct a sensitivity analysis to evaluate how future efficiency improvements in power converters and changes in electricity tariffs may affect LCC savings. This analysis shows that DC systems can be cost-effective in all scenarios that include large capacities of battery storage and onsite solar, whereas for systems without storage, DC distribution is generally not cost-effective due to lower energy bill savings.

show abstract

A simulation based comparison of AC and DC power distribution networks in buildings

Cited by 25 publications

References 23 publications

Synthetic evaluation of DC power quality based on combination weighting

Synthetic evaluation of DC power quality based on combination weighting

Efficient and Zero Net Energy-Ready Plug Loads

Techno-economic analysis of DC power distribution in commercial buildings

Contact Info

Product

Resources

About