Dynamic Adaptive Relaying for Distribution Grids with High Inverter-Based Generation

Research output: Contribution to conferencePaper


The penetration of distributed energy resources (DERs) in distribution systems is rapidly increasing. This can lead to large variations in the operating load and the fault current seen by a relay, which can impact the reliability of overcurrent protection. Adaptive overcurrent relaying (AOCR) can address this concern by enabling the relay to adjust its pickup settings based on the system operating conditions. This paper presents a novel dynamic AOCR approach that allows the relays to locally estimate the pickup settings and dynamically modify them. The approach is based on a two-stage estimation algorithm that uses local measurements and system information to estimate the worst-case fault current and the relay pickup settings. The relay pickup settings are then dynamically modified based on the estimated fault current. The performance of the proposed approach is evaluated on multiple configurations of the EPRI J1 feeder and the IEEE 13-bus system. The results show that the proposed approach can effectively improve the reliability of overcurrent protection in distribution systems with DERs.
Original languageAmerican English
StatePublished - 2024
Event2023 IEEE Industry Applications Society Annual Meeting (IAS) - Nashville, Tennessee
Duration: 29 Oct 20232 Nov 2023


Conference2023 IEEE Industry Applications Society Annual Meeting (IAS)
CityNashville, Tennessee

NREL Publication Number

  • NREL/CP-5D00-86126


  • adaptive overcurrent protection
  • distributed energy resources
  • grid-following inverters
  • relays
  • trip time


Dive into the research topics of 'Dynamic Adaptive Relaying for Distribution Grids with High Inverter-Based Generation'. Together they form a unique fingerprint.

Cite this