Interregional Renewable Energy Zones in National Transmission Analysis

David Hurlbut, Dylan Harrison-Atlas, Jianyu Gu

Research output: NRELTechnical Report


This report describes the interregional renewable energy zone (IREZ) methodology for national application in the United States. The aim is to develop a data-driven, replicable methodology for use in long-term regional and interregional transmission planning. An IREZ is best understood as a conceptual transmission collection point that is easily accessible to a very high volume of low-cost developable wind and solar energy potential. The objective is to identify opportunities for new high-volume long-distance interregional transmission corridors: a limited number of lines with higher voltages, with reduced total cost per megawatt of transfer capability.
Original languageAmerican English
Number of pages44
StatePublished - 2022

NREL Publication Number

  • NREL/TP-6A20-83924


  • renewable energy zones
  • transmission planning


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