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A Unified Metric for Fast Frequency Response in Low-Inertia Power Systems

Conference ·

Future power systems with more inverter-based resources (IBRs), will be vulnerable to frequency decline contingencies. Fast frequency response (FFR) provided by IBRs is a good candidate to arrest frequency excursions. Diverse types of FFR have been proposed, and some have been deployed in our power systems. Without a unified quantification of FFR, it is hard for the grid operators to compare and fully leverage the FFR capabilities of IBRs. This work introduces a potential unified metric that quantifies two key characteristics of FFR and describes its application to three prevailing FFR types. We then use metric-to-frequency mapping to validate the accuracy of the metric in predicting the impact of a given FFR on the trajectory of a frequency event. The results show that the proposed metric is simple yet accurately captures the ability of diverse forms of FFR to improve system frequency dynamics.

Research Organization:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office
DOE Contract Number:
AC36-08GO28308
OSTI ID:
1973222
Report Number(s):
NREL/CP-5D00-86220; MainId:86993; UUID:9940bb5f-f041-47a6-919b-e88a35129c17; MainAdminID:69461
Resource Relation:
Conference: Presented at the 2023 IEEE Power & Energy Society Innovative Smart Grid Technologies Conference (ISGT), 16-19 January 2023, Washington, D.C.; Related Information: 81409
Country of Publication:
United States
Language:
English

References (4)

Modeling Frequency Dynamics in Unit Commitment With a High Share of Renewable Energy journal November 2020
Integrating Model-Driven and Data-Driven Methods for Power System Frequency Stability Assessment and Control journal November 2019
Foundations and Challenges of Low-Inertia Systems (Invited Paper) conference June 2018
Effects of decreasing synchronous inertia on power system dynamics—Overview of recent experiences and marketisation of services journal July 2019