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Viable residential DC microgrids combined with household smart AC and DC loads for underserved communities

  • Karthik PalaniappanEmail author
  • Swachala Veerapeneni
  • Robert M. Cuzner
  • Yue Zhao
Original Article
  • 34 Downloads

Abstract

The availability of fossil fuels in the future and the environmental effects such as the carbon footprint of the existing methodologies to produce electricity is an increasing area of concern. In rural areas of under-developed parts of the world, the problem is lack of access to electrification. DC microgrids have become a proven solution to electrification in these areas with demonstrated exceptional quality of power, high reliability, efficiency, and simplified integration between renewable energy sources (principally solar PV) and energy storage. In the United States, a different problem occurs that can be addressed with the same DC microgrid approach that is finding success internationally. In disinvested, underserved communities of with high unemployment and low wages, households contribute a significant portion of their income toward the fixed cost of their electrical utility connection, which by law must be supplied to every household. This paper analyzes a residential DC microgrid in an urban, underserved area that enables the sharing of renewable and stored energy resources between dwellings. The goal of the residential DC microgrid is to drive down to fixed costs of utility-provided electricity to all participants, such that the percentage of utility cost to total household income comes can be made comparable to that of more advantaged communities. A group of renovated dwellings constitute the community which the DC microgrid would serve. The distributed installation of solar panels and battery storage among dwelling locations are optimized based upon varying consumption patterns. Also, consumption patterns during different seasons of the year are considered. Electrical distribution architectures within the dwellings are based upon conventional AC. Each dwelling has a DC interface to the residential microgrid and progressive insertion of DC loads, with associated household DC distribution, is considered.

Keywords

DC microgrids DC loads Utility cost Community microgrid Smart AC loads 

Nomenclature

DC MG

DC microgrid

DER

distributed energy resources

DOE

Department of Energy

RECS

residential energy consumption survey

ALP

aggregated load profile

ASGP

aggregated solar generation profile

USP

unit size panel

NLP

net load profile

NREL

National Renewable Energy Laboratories

L(i)

load data from ALP

S(i)

solar data from ASGP

HEMS

Home Energy Management System

MEMS

Microgrid Energy Management System

DSM

demand side management

Notes

Funding information

This work was supported in part by the National Science Foundation under Grant No. 1439700.

Compliance with ethical standards

Conflict of interest statement

The authors declare that they have no conflict of interest.

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Copyright information

© Springer Nature B.V. 2018

Authors and Affiliations

  1. 1.University of WisconsinMilwaukeeUSA
  2. 2.University of ArkansasFayettevilleUSA

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