Impacts of Experimentally Obtained Harmonic Spectrums of Residential Appliances on Distribution Feeder

Jinia Roy, Akshay Jain, Barry Mather

Research output: NRELPresentation


Owing to the increased use of power electronic based appliances and energy-efficient home equipment such as modern lighting loads, the percentage of nonlinear loads has increased in the distribution system, which can impact system performance, loss, and stability. Thus a comprehensive knowledge of their power quality and harmonic analysis is essential to improve the load models, voltage stability assessment, determination of possible interactions at harmonic frequencies, protection planning, and the effect of system impedance. This paper focuses on harmonic load flow analysis for multiple residential load types to determine the expected impacts on an modeled distribution secondary. For this study, the household appliances include lighting, power electronic, resistive, and motor loads with a nominal supply voltage of 120 V single-phase or 240 V split phase at a nominal frequency of 60 Hz. The harmonic spectrums, as obtained from the experimental evaluation of real loads, are used to inform the harmonic load flow for a detailed secondary network, including the distribution service transformer extracted from a real distribution feeder's model. Additionally, the impact of voltage harmonics on a three-phase test load is presented with experimental results. The harmonic data of the transformer terminal voltage, as obtained from the former load flow study, are scaled to generate the source voltage for the three-phase configuration of the grid simulator to make the test setup very similar to a typical secondary design in the U.S.
Original languageAmerican English
Number of pages16
StatePublished - 2020

Publication series

NamePresented at the 2020 IEEE Texas Power and Energy Conference (TPEC), 5-7 February 2020, College Station, Texas

Bibliographical note

See NREL/CP-5D00-75751 for related conference paper

NREL Publication Number

  • NREL/PR-5D00-76024


  • equivalent power loss
  • harmonic power flow
  • load modeling
  • OpenDSS
  • residential loads
  • total harmonic distortion


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