Energy and Power Quality Measurement for Electrical Distribution in AC and DC Microgrid Buildings

Daniel Gerber, Omkar Ghatpande, Moazzam Nazir, Willy Bernal Heredia, Wei Feng, Richard Brown

Research output: Contribution to journalArticlepeer-review

22 Scopus Citations


Today's selection of DC microgrid buildings features a diverse set of electrical topologies and turnkey solutions, each with specific design trade-offs and optimizations. Designers desperately need standardized metrics and procedures for measurement and verification (M&V) to analyze and compare the advantages of each DC solution to traditional AC building networks. This work develops M&V procedures for quantifying and comparing the energy efficiency and power quality in buildings. To calculate full-building efficiency, this work introduces the measurement-informed modeling method, a procedure that develops and refines a building's energy model with metered data. To quantify power quality, this work defines a new voltage quality index that applies to both AC and DC buildings. This article describes the equipment, instrumentation, and operation necessary to calculate the efficiency and power quality. It then demonstrates these methods with a set of field tests. These M&V procedures can ultimately be used to compare and improve the efficiency and power quality of various DC topologies.

Original languageAmerican English
Article number118308
Number of pages10
JournalApplied Energy
StatePublished - 2022

Bibliographical note

Publisher Copyright:
© 2021

NREL Publication Number

  • NREL/JA-5500-80733


  • Buildings
  • DC microgrids
  • Energy
  • Measurement and verification
  • Power quality


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