Developing Frequency Stability Constraint for Unit Commitment Problem Considering High Penetration of Renewables

Ningchao Gao, Shuan Dong, Xin Fang, Andy Hoke, David Gao, Jin Tan

Research output: Contribution to conferencePaper

1 Scopus Citations

Abstract

As zero-carbon electricity systems become the trend of future grid, the system inertia provided by conventional synchronous generators (SGs) keeps decreasing. The resultant lower system inertia will inevitably cause frequency stability problem, especially in the first few seconds following disturbance. To tackle this challenge, this paper proposes a frequency stability constraint for power systems unit commitment problem by considering the fast frequency responses (FFRs) from inverter-based resources (IBRs). Our developed frequency stability constraint is grounded on an analytical frequency nadir estimation framework that considers both SG and IBR dynamics. The accuracy of our frequency nadir estimation framework is validated by most severe N-1 contingency simulation result in a real island system. Then, the adaptive inertia frequency stability constraint is derived by performing sensitivity analysis with our frequency nadir estimation framework. Finally, we demonstrate the effectiveness of our developed frequency stability constraint with one year day-ahead unit commitment results of the island system.
Original languageAmerican English
Number of pages4
DOIs
StatePublished - 2023
Event2023 IEEE 50th Photovoltaic Specialists Conference (PVSC) - San Juan, Puerto Rico
Duration: 11 Jun 202316 Jun 2023

Conference

Conference2023 IEEE 50th Photovoltaic Specialists Conference (PVSC)
CitySan Juan, Puerto Rico
Period11/06/2316/06/23

Bibliographical note

See NREL/CP-5D00-86622 for preprint

NREL Publication Number

  • NREL/CP-5D00-88828

Keywords

  • fast frequency response
  • frequency nadir
  • inverter-based resources
  • stability constraint
  • unit commitment

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