Experimental Evaluation of Grid Support Enabled PV Inverter Response to Abnormal Grid Conditions

Austin Nelson, Gregory Martin, James Hurtt

Research output: Contribution to conferencePaperpeer-review

11 Scopus Citations

Abstract

As revised interconnection standards for grid-tied photovoltaic (PV) inverters address new advanced grid support functions (GSFs), there is increasing interest in inverter performance in the case of abnormal grid conditions. The growth of GSF-enabled inverters has outpaced the industry standards that define their operation, although recently published updates to UL1741 Supplement SA define test conditions for GSFs such as volt-var control, frequency-watt control, and voltage/frequency ride-through, among others. This paper describes the results of a comparative experimental evaluation on four commercially available, three-phase PV inverters in the 24.0-39.8 kVA power range on their GSF capability and its effect on abnormal grid condition response. The evaluation examined the impact particular GSF implementations have on run-on times during islanding conditions, peak voltages in load rejection overvoltage scenarios, and peak currents during single-phase and three-phase fault events for individual inverters. Testing results indicated a wide variance in the performance of GSF enabled inverters to various test cases.

Original languageAmerican English
Number of pages5
DOIs
StatePublished - 26 Oct 2017
Event2017 IEEE Power and Energy Society Innovative Smart Grid Technologies Conference, ISGT 2017 - Washington, United States
Duration: 23 Apr 201726 Apr 2017

Conference

Conference2017 IEEE Power and Energy Society Innovative Smart Grid Technologies Conference, ISGT 2017
Country/TerritoryUnited States
CityWashington
Period23/04/1726/04/17

Bibliographical note

See NREL/CP-5D00-67576 for preprint

NREL Publication Number

  • NREL/CP-5D00-71019

Keywords

  • Anti-islanding
  • Fault current
  • Frequency-watt control
  • Load rejection overvoltage
  • Ride-through
  • Volt-var control

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