Modeling and Nonlinear Control of a Wind Turbine System Based on a Permanent Magnet Synchronous Generator Connected to the Three-phase Network

Abstract

<span lang="EN-US">This article presents nonlinear control of wind conversion chain connected to the grid based on a permanent magnet synchronous generator. The control objectives are threefold; i) forcing the generator speed to track a varying reference signal in order to extract the maximum power at different wind speed (MPPT); ii) regulating the rectifier output capacitor voltage; iii) reducing the harmonic and reactive currents injected in the grid. This means that the inverter output current must be sinusoidal and in phase with the AC supply voltage (PFC). To this end, a nonlinear state-feedback control is developed, based on the average nonlinear model of the whole controlled system. This control strategy involves backstepping approach, Lyapunov stability and other tools from theory of linear systems. The proposed state-feedback control strategy is tested by numerical simulation which shows that the developed controller reaches its objectives</span>

Intelligent approach on sensorless control of permanent magnet synchronous generator

“…Assuming a non-salient pole PMSG the d and q axes inductances will be equal. The resulting torque equation T e is given by (6).…”

“…A nonlinear control method is used to generate MPP. The nonlinear controller used to improve the system's dynamic performance is built using average theory and Lyapunor stability [6]. PMSG output power and rotor speed characteristics can now be analyzed in an entirely new way.…”

Intelligent condition monitoring of variable speed wind energy conversion systems based on decentralized sliding mode observer

“…A new approach to active sensor fault tolerant output feedback tracking control for WT systems via TS model is presented in [7]. Many authors have proposed SMO design methods [8][9][10][11].…”