Frequency Support of PMSG-WTG Based on Improved Inertial Control

Eduard Muljadi, Vahan Gevorgian, Z. Wu, X. Wang, W. Gao, M. Kang, M. Hwang, Y. Kang

Research output: Contribution to conferencePaperpeer-review

1 Scopus Citations


With increasing integrations of large-scale systems based on permanent magnet synchronous generator wind turbine generators (PMSG-WTGs), the overall inertial response of a power system will tend to deteriorate as a result of the decoupling of rotor speed and grid frequency through the power converter as well as the scheduled retirement of conventional synchronous generators. Thus, PMSG-WTGs can provide value to an electric grid by contributing to the system's inertial response by utilizing the inherent kinetic energy stored in their rotating masses and fast power control. In this work, an improved inertial control method based on the maximum power point tracking operation curve is introduced to enhance the overall frequency support capability of PMSG-WTGs in the case of large supply-demand imbalances. Moreover, this method is implemented in the CART2-PMSG integrated model in MATLAB/Simulink to investigate its impact on the wind turbine's structural loads during the inertial response process. Simulation results indicate that the proposed method can effectively reduce the frequency nadir, arrest the rate of change of frequency and mitigate the secondary frequency drop while imposing no negative impact on the major mechanical components of the wind turbine.

Original languageAmerican English
Number of pages5
StatePublished - 10 Nov 2016
Event2016 IEEE Power and Energy Society General Meeting, PESGM 2016 - Boston, United States
Duration: 17 Jul 201621 Jul 2016


Conference2016 IEEE Power and Energy Society General Meeting, PESGM 2016
Country/TerritoryUnited States

Bibliographical note

See NREL/CP-5D00-65916 for preprint

NREL Publication Number

  • NREL/CP-5D00-67708


  • FAST model
  • Frequency regulation
  • Inertial response
  • Maximum power point tracking
  • Permanent magnet synchronous generator wind turbine


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