scope:

This standard establishes the required interconnection capability and performance criteria for inverter-based resources interconnected with transmission and sub-transmission systems.^{10, 11, 12} Included in this standard are performance requirements for reliable integration of inverter-based resources into the bulk power system, including, but not limited to: voltage and frequency ride-through, active power control, reactive power control, dynamic active power support under abnormal frequency conditions, dynamic voltage support under abnormal voltage conditions, power quality, negative sequence current injection, and system protection. This standard shall also be applied to isolated inverter-based resources that are interconnected to an ac transmission system via a dedicated voltage source converter high-voltage direct current (VSC-HVDC) transmission facility; in these cases, the standard shall apply to the combination of the isolated IBR and the VSC-HVDC facility and shall not apply to the isolated IBR unless they serve as a supplemental IBR device that is necessary for the IBR plant with VSC-HVDC to meet the requirements of this standard at the reference point of applicability.

Purpose

This standard provides uniform technical minimum requirements for the interconnection, capability, and performance of inverter-based resources interconnecting with transmission and sub-transmission systems.

¹⁰ Requirements apply to inverter-based resources (IBRs) only, e.g., solar photovoltaic, wind, and energy storage systems or combinations of such. This excludes any systems that are not resources, e.g., flexible ac transmission systems (FACTS) and synchronous condensers, and any resources that are not inverter-based, e.g., gas and steam power plants with synchronous generators.

¹¹ This standard does not explicitly specify requirements for HVDC. However, it specifies requirements for inverter-based resources (generation and storage) and that includes isolated IBR that are interconnected to an ac transmission system via a dedicated voltage source converter (VSC) high-voltage direct current (HVDC) transmission facility, e.g., an offshore wind park. In these cases, the combination of isolated IBR and VSC-HVDC transmission facility is regarded as the IBR to which this standard is applicable. This standard is not intended to specify requirements for VSC-HVDC that connect two buses in a meshed synchronous ac system.

¹² Resources with doubly-fed generators (DFGs) are defined as IBR, but requirements specified for IBR plants with DFG in this standard may slightly differ, where appropriate.