AUTHOR=Li Bo , Yang Shihai , Yang Bin , Fang Kaijie 

TITLE=Robust Nonlinear Control of DFIG-Based Wind Farms for Damping Inter-Area Oscillations of Power Systems

JOURNAL=Frontiers in Energy Research

VOLUME=Volume 10 - 2022

YEAR=2022

URL=https://www.frontiersin.org/journals/energy-research/articles/10.3389/fenrg.2022.936580

DOI=10.3389/fenrg.2022.936580

ISSN=2296-598X

ABSTRACT=This paper presents a perturbation observer-based robust nonlinear damping control (RNDC)
scheme for doubly-fed induction generator (DFIG)-based wind farm to damp the inter-area
oscillations of multi-area power systems. In the RNDC scheme, perturbation term is introduced
to describe the combined effects of nonlinearities, uncertainties, and disturbances of multi-area
power systems with wind farms. The feedback linearization control is realized for reactive power
control loops of DFIG based on the state estimation and perturbation estimation derived from
perturbation observer, thus achieving the damping control of DFIG. The proposed RNDC scheme
only need one measurement signal and it does not require any model parameters. Simulation
studies are carried out on a two-area power system model integrated with wind farm to validate
the control performance of RNDC scheme under the conditions of three-phase-to-ground faults,
parameter variations and time delays.