Abstract: Renewable energy–based power plants connected to transmission or sub-transmission networks through power electronic converters are referred to as inverter-based resources (IBRs). When integrated into grids with low system strength, IBRs face significant voltage stability challenges and operational issues. To ensure secure operation, it is essential to understand the active and reactive power boundaries-represented by the P-Q capability area-within which an IBR can operate. A detailed analytical description of the P–Q capability boundaries of IBRs connected to a point of interconnection (POI) through a tie-line, consistent with the plant structure in IEEE Std. 2800-2022, is not available in the literature. This work presents a systematic derivation of the boundary curves, fully incorporating the constraints on apparent power, voltage magnitudes, and active power, while accounting for the possible range of voltage variations at both the inverter terminals and the POI. In addition, two potential applications of the proposed P-Q capability analysis are discussed: (i) dynamic reactive power management under plant-level voltage control operation and (ii) compliance assessment with minimum reactive power requirements as per IEEE Std. 2800-2022. The proposed analytical framework can be used for any application that requires accurate characterization of P-Q capability of IBRs.

Event Details
Title: P-Q capability boundary of inverter-based resources
Date: March 20, 2026 at 3:00 PM
Venue: ESB 244
Speaker: Mr. Athbel Joe C (EE21D007)
Guide: Dr. Krishna S
Type: PHD seminar

Updated: