Robust Control of a PMSG-Based Wind Turbine Generator Using Lyapunov Function
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Date
2021-03-19Author
García Márquez, Fausto Pedro
Pourebrahim, Roghayyeh
Shotorbani, Amin Mohammadpour
Tohidi, Sajjad
Mohammadi-ivatloo, Behnam
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This paper proposes a robust finite-time controller (FTC) for a permanent magnet synchronous generator (PMSG)-based wind turbine generator (WTG). An adaptive observer is used
for the rotor angle, rotor speed, and turbine torque estimations of the PMSG, thus eliminating the
use of anemometers. The robustness of the proposed FTC regarding parameter uncertainty and the
external weak power grid is analyzed. The impacts of the power grid short-circuit ratio (SCR) at the
point of common coupling (PCC) on the conventional proportional-integral (PI) controller and the
proposed FTC are discussed. Case studies illustrate that the proposed observer-based FTC is able to
estimate the mechanical variables accurately and provides robust control for WTGs with parameter
uncertainty and weak power grids.