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Title: Short-Term Frequency Response of a DFIG-Based Wind Turbine Generator for Rapid Frequency Stabilization

This paper proposes a short-term frequency-response scheme of a doubly-fed induction generator (DFIG)-based wind turbine generator (WTG) for improving rotor speed recovery and frequency nadir. In the energy-releasing period, to improve the frequency nadir and rotor speed convergence by releasing a large amount of kinetic energy stored in the rotating masses in a DFIG-based WTG, the power reference is increased up to the torque limit referred to the power and reduces along with it for a predefined period which is determined based on the occurrence time of the frequency nadir in a power grid. Then, the reference decreases so that the rotor speed is forced to be converged to the preset value in the stable operating region of the rotor speed. In the energy-absorbing period, to quickly recover the rotor speed, the reference smoothly decreases with the rotor speed and time during a predefined period until it intersects with the maximum power point tracking curve. The simulation results demonstrate that the proposed scheme successfully achieves rapid frequency stabilization with the improved frequency nadir under various wind conditions based on the IEEE 14-bus system.
ORCiD logo [1] ;  [1] ; ORCiD logo [2] ;  [3] ;  [4] ; ORCiD logo [5] ;  [4]
  1. Chonbuk National University, Chonju (Korea). Department of Electrical Engineering and Wind Energy Grid-Adaptive Technology (WeGAT) Research Centre
  2. National Renewable Energy Lab. (NREL), Golden, CO (United States)
  3. Univ. of Denver, CO (United States). Department of Electrical and Computer Engineering
  4. Gachon University, Seoul (Korea). Department of Energy IT
  5. Gyeongsang National University, Jinju (Korea). Department of Electrical Engineering
Publication Date:
Report Number(s):
Journal ID: ISSN 1996-1073; ENERGA
Grant/Contract Number:
AC36-08GO28308; AC36-08-GO28308
Published Article
Journal Name:
Energies (Basel)
Additional Journal Information:
Journal Name: Energies (Basel); Journal Volume: 10; Journal Issue: 11; Journal ID: ISSN 1996-1073
Research Org:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Wind and Water Technologies Office (EE-4W)
Country of Publication:
United States
17 WIND ENERGY; 42 ENGINEERING; short-term frequency response; frequency nadir; doubly-fed induction generator; torque limit; frequency stabilization; rotor speed convergence
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1415128