Efficiency analysis of AC coupled and DC coupled microgrids considering load profile variations

Atia, Hameed R.; Shakya, Ayush; Tandukar, Prajina; Tamrakar, Ujjwol; Hansen, Timothy M.; Tonkoski, Reinaldo

doi:10.1109/eit.2016.7535324

Cited by 19 publications

(20 citation statements)

References 11 publications

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“…In terms of efficiencies, conversion losses should also be compared in both configurations before commissioning [65]. AC-coupled systems have higher efficiency than DC-coupled systems [67,68] and with the combination of battery storage, they can deliver more supply to the loads [69]. On community locations, AC-coupled systems are relevant configurations for installation because there is no direct PV production [70].…”

Section: Case Study: Wgvmentioning

confidence: 99%

Shared Solar and Battery Storage Configuration Effectiveness for Reducing the Grid Reliance of Apartment Complexes

2020

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More than 2 million houses in Australia have installed solar photovoltaic (PV) systems; however, apartment buildings have adopted a low percentage of solar PV and battery storage installations. Given that grid usage reduction through PV and battery storage is a primary objective in most residential buildings, apartments have not yet fully benefited from installations of such systems. This research presents shared microgrid configurations for three apartment buildings with PV and battery storage and evaluates the reduction in grid electricity usage by analyzing self-sufficiency. The results reveal that the three studied sites at White Gum Valley achieved an overall self-sufficiency of more than 60%. Owing to the infancy of the shared solar and battery storage market for apartment complexes and lack of available data, this study fills the research gap by presenting preliminary quantitative findings from implementation in apartment buildings.

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Section: Case Study: Wgvmentioning

confidence: 99%

Shared Solar and Battery Storage Configuration Effectiveness for Reducing the Grid Reliance of Apartment Complexes

2020

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“…2. [14] The work of [15] is somewhat related to the work presented [3] as regards a fixed ratio of AC and DC loads. [16] focuses on the model of a commercial facility.…”

Section: Figurementioning

confidence: 99%

“…The common assumptions include models comprising of DC loads only [2], [4], [8], [9], [13], [14], [18]- [23]; fixed proportion of AC and DC loads [3], [15]; consideration of a single or small set of loads for analysis [7], [12], [18]- [21]; uneven or arbitrary distribution of loads among various classes [1], [5], [6], [23] and neglecting the actual effect of load variation [2], [5], [6], [17]- [19], [24], [25].In contrast, a realistic load model considering a variety of loads with actual load profile and appliances divided into AC and DC classes without assumptions of being internally DC or direct DC; can be the best fit for definite comparative analysis of AC and DC distribution system efficiency. Fig.…”

Section: Figure 2 Load Model For Led Loadsmentioning

confidence: 99%

AC vs DC Distribution Efficiency: Are we on the Right Path?

Gelani

Dastgeer

Nasir³

et al. 2021

Preprint

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The concept of DC power distribution has gained interest within the research community in the past years; especially due to rapid prevalence of solar PVs as a tool for distributed generation in DC microgrids. Various efficiency analyses have been presented for the DC distribution paradigm, in comparison to the AC counterpart, considering a variety of scenarios. However, even after a number of such comparative efficiency studies, there seems to be a disparity in the results of research efforts - wherein a definite verdict is still unavailable: 'Is DC distribution a more efficient choice as compared to the conventional AC system?' A final verdict is absent primarily due to conflicting results. In this regard, system modeling and the assumptions made in different studies play a significant role in affecting the results of the study. The current paper is an attempt to critically observe the modeling and assumptions used in the efficiency studies related to the DC distribution system. Several research efforts will be analyzed for their approach towards the system upon which they have performed efficiency studies. Subsequently, the paper aims to propose a model that may alleviate the shortcomings in earlier research efforts and be able to give a definite verdict regarding the comparative efficiency of DC and AC networks for residential power distribution.

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“…Reference [20] is another comparative analysis of efficiency for AC and DC microgrids. The authors mention that they have used a stochastic technique for estimation of household load profile for a small community microgrid.…”

Section: Efficiency Studies Of DC Distribution: the Presentmentioning

confidence: 99%

Analyses of efficiency/energy-savings of DC power distribution systems/microgrids: Past, present and future

Dastgeer

Gelani

Anees

et al. 2019

International Journal of Electrical Power & Energy Systems

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DC is reappearing in the power systemit can be seen on the generation side as solar photovoltaics and wind farms with AC/DC/AC conversion; on the transmission side as HVDC lines and on the consumer side as a variety of modern electronic loads. Power distribution is an area where DC has not yet made any practically extensive appearance, this area is still in research phase. Related to DC distribution, the concept of DC microgrids is also witnessing a significant research contribution in the recent times. One of the research areas besides system control, protection etc., is the energy efficiency of the system. This paper gives an overview of the recent and relatively old research efforts in the field of efficiency/energysavings analysis for the DC power distribution system. Furthermore, critical analysis of the previous research efforts has been provided and gap in the present body of knowledge related to this field has been identified. The requirements of a comprehensive analysis, mathematical modelling and system designing from a future study in this direction have been mentioned. The findings of this paper can serve as guidance for further investigation and research for the energy savings potential of DC power distribution networks.

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Efficiency analysis of AC coupled and DC coupled microgrids considering load profile variations

Cited by 19 publications

References 11 publications

Shared Solar and Battery Storage Configuration Effectiveness for Reducing the Grid Reliance of Apartment Complexes

Shared Solar and Battery Storage Configuration Effectiveness for Reducing the Grid Reliance of Apartment Complexes

AC vs DC Distribution Efficiency: Are we on the Right Path?

Analyses of efficiency/energy-savings of DC power distribution systems/microgrids: Past, present and future

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