A Power Hardware-in-the-Loop Framework for Advanced Grid-Interactive Inverter Testing

Anderson Hoke, Sudipta Chakraborty, Thomas Basso

Research output: Contribution to conferencePaperpeer-review

34 Scopus Citations

Abstract

This paper presents a power hardware-in-the-loop (PHIL) framework for testing advanced inverter features such as voltage regulation and frequency response that interact dynamically with the electric grid. The PHIL model simulates grid voltage dynamics using a simplified Thévenin-based model and simulates grid frequency dynamics using a turbine-governor model including droop, inertia, and damping. Also presented are a statistical analysis of short-circuit impedances in the IEEE 8500-node test feeder, and analytical justification for approximating Thévenin impedances at inverter connection points as short-circuit impedances. Test results are presented for two inverters performing volt-VAr control, high-frequency power curtailment, voltage and frequency ride-through, and abnormal voltage disconnection while connected to the PHIL system. Results confirm advanced grid support functions have the desired effects when performing voltage regulation and high-frequency power curtailment while riding through large voltage and frequency transients. Some PHIL tests presented here replicate IEEE 1547.1-style conformance tests; no evidence is seen that grid dynamic response emulation affects the results of such conformance tests.

Original languageAmerican English
Number of pages5
DOIs
StatePublished - 2015
Event2015 IEEE Power & Energy Society Innovative Smart Grid Technologies Conference (ISGT) - Washington, D.C.
Duration: 18 Feb 201520 Feb 2015

Conference

Conference2015 IEEE Power & Energy Society Innovative Smart Grid Technologies Conference (ISGT)
CityWashington, D.C.
Period18/02/1520/02/15

Bibliographical note

Publisher Copyright:
© 2015 IEEE.

NREL Publication Number

  • NREL/CP-5D00-63265

Keywords

  • frequency control
  • Inverters
  • power hardware-in-the-loop
  • power system modeling
  • testing
  • voltage control

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