Application of finite-time control Lyapunov function in low-power PMSG wind energy conversion systems for sensorless MPPT

Shotorbani, Amin Mohammadpour, Mohammadi-Ivatloo, Behnam, Wang, Liwei, Marzband, Mousa and Sabahi, Mehran (2019) Application of finite-time control Lyapunov function in low-power PMSG wind energy conversion systems for sensorless MPPT. International Journal of Electrical Power & Energy Systems, 106. pp. 169-182. ISSN 0142-0615

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Shotorbani et al - Application of finite-time control Lyapunov function in low-power PMSG wind energy conversion systems for sensorless MPPT AAM.docx - Accepted Version
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Official URL: http://dx.doi.org/10.1016/j.ijepes.2018.09.039

Abstract

This paper discusses the problem of observer-based finite-time control (FTC) of a grid-connected wind turbine and a low-power permanent magnet synchronous generator (PMSG). An adaptive nonlinear observer is employed to estimate the mechanical variables. Maximum power point tracking (MPPT) is obtained using the estimation of rotor speed and torque from the adaptive observer, and excluding the wind speed sensor. Improvement of the MPPT technique through the designed FTC is investigated. The proposed controller stabilizes the WECS and tracks the reference trajectories in a short pre-known time alternative to common nonlinear controllers with large settling time. The suggested controller is also robust against uncertainties in WECS parameters. Parameters’ variations are compensated by robust control design. Finite time stability and robustness of the proposed WECS controller is mathematically proved. Moreover, the advanced performance of the suggested FTC is demonstrated by simulation and is compared to a conventional asymptotic convergent controller (ACC). The proposed FTC provides fast and robust rotor speed regulation and thus enhances the sensorless MPPT. The proposed FTC improves the WECS performance for tracking of ramp references and robustness against parameter uncertainties. Furthermore, advanced control of the grid-side converter yields improved resiliency and reliability.

Item Type: Article
Uncontrolled Keywords: Wind turbine; PMSG; Control Lyapunov function; Robust control; Adaptive state observer
Subjects: H600 Electronic and Electrical Engineering
H800 Chemical, Process and Energy Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Paul Burns
Date Deposited: 26 Oct 2018 14:01
Last Modified: 26 Oct 2018 14:01
URI: http://nrl.northumbria.ac.uk/id/eprint/36446

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