Advanced LVRT strategy for SCIG‑based wind energy conversion systems using feedback linearization and sliding mode control

Anh Tan Nguyen; Dong-Choon Lee

Advanced LVRT strategy for SCIG‑based wind energy conversion systems using feedback linearization and sliding mode control

Anh Tan Nguyen

Dong-Choon Lee

Vol. 21, No. 8, pp. 1180-1189, Aug. 2021

10.1007/s43236-021-00256-2

Feedback linearization

Sliding mode control

Squirrel-cage induction generator

Wind turbine system

Abstract

This paper proposes an advanced fault ride-through strategy using feedback linearization (FL) and sliding mode control (SMC) for squirrel-cage induction generator (SCIG)-based wind energy conversion systems (WECSs). Based on FL theory, a nonlinear dynamic model of a SCIG wind turbine system is linearized with only two decoupled state variables: d-axis stator current and DC-link voltage. Thus, d-axis stator current and DC-link voltage controllers can be simply designed with the linear control theory. Moreover, with the proposed FL control law, the DC-link voltage control can be performed by directly regulating the q-axis stator voltage without a q-axis current controller. During grid voltage sags, the output power of the SCIG is reduced to maintain the DC-link voltage. By applying SMC theory to the design of d-axis stator current and DC-link voltage controllers, robust performance of control systems can be achieved even under parameter variations. The feasibility of the proposed method has been demonstrated via simulation and experimental results.

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Cite this article

[IEEE Style]

A. T. Nguyen and D. Lee, "Advanced LVRT strategy for SCIG‑based wind energy conversion systems using feedback linearization and sliding mode control," Journal of Power Electronics, vol. 21, no. 8, pp. 1180-1189, 2021. DOI: 10.1007/s43236-021-00256-2.

[ACM Style]

Anh Tan Nguyen and Dong-Choon Lee. 2021. Advanced LVRT strategy for SCIG‑based wind energy conversion systems using feedback linearization and sliding mode control. Journal of Power Electronics, 21, 8, (2021), 1180-1189. DOI: 10.1007/s43236-021-00256-2.