A simple maximum power point tracking based control strategy applied to a variable speed squirrel cage induction generator

This paper proposes the design of a multivariable robust control strategy for a variable-speed WECS based on a SCIG. Optimal speed control of the SCIG is achieved by a conventional PI controller combined with a MPPT strategy. DTC-SVM technique based on a simple Clarke transformation is used to control the generator-side three-level converter in the variable speed WECS. The flow of real and reactive power between the inverter and the grid is controlled via the grid real and reactive currents and the DC link voltage using multivariable H ∞ control. The overall WECS and control scheme are developed in Matlab/Simulink and the performance of the proposed control strategy is evaluated via a set of simulation scenarios replicating various operating conditions of the WECS such as variable wind speed and asymmetric single grid faults. The power quality of the WECS system under H ∞ control control approach is assessed and the results show a significant improvement in the total harmonic distorsion as compared to that achieved with a classical PI control.

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“…1. The three-bladed wind turbine and the SCIG are connected to the grid via a two three-level NPC-based AC/DC/AC converters [18].…”

Section: Configuration Of the Variable-speed Wind Energy Power Systemmentioning

confidence: 99%

“…The optimal speed output from the MPPT will represent the reference for the DTC-SVPWM of the converter [18].…”

Section: Introductionmentioning

confidence: 99%

Multivariable control of a grid-connected wind energy conversion system with power quality enhancement

et al. 2016

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“…This means that the locus of the point representing the maximum power can be determined and tracked by adapting the speed of the turbine. Thus, to maximize the converted power, the turbine speed must be adapted to wind speed to follow the trajectory of the maximum power point given by equation (2) [4,5].…”

Section: Wind Turbine and Mppt Modelsmentioning

confidence: 99%

Multivariable Robust Grid Currents Control of a Squirrel Cage Induction Generator Connected to a Wind Turbine

Hachemi¹,

Boulouiha²,

Allali³

et al. 2015

AEI

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In this paper, a multivariable robust control strategy of a variable speed wind energy conversion system based on a squirrel cage induction generator (SCIG) is presented. Optimal speed control of the SCIG is achieved by a conventional PI controller combined with a Maximum Power Point Tracking (MPPT) strategy. The Indirect Field Oriented Control (IFOC) technique based on a simple Park (d-q) reference model is used to implement the proposed controller. Active and reactive power flow between the grid and the inverter is controlled via simultaneous H-infinity control of active and reactive currents of the grid and the DC link voltage. The switching technique of the inverter which is connected directly to the grid is controlled by a programmed PWM look-up table wave shaping. The robustness and performance of the proposed control scheme is evaluated on a comprehensive model of the wind energy conversion system using Matlab/Simulink.

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Optimisation of Wind System Conversion

Rekioua

2014

Wind Power Electric Systems

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A simple maximum power point tracking based control strategy applied to a variable speed squirrel cage induction generator

Cited by 15 publications

References 14 publications

Multivariable control of a grid-connected wind energy conversion system with power quality enhancement

Multivariable control of a grid-connected wind energy conversion system with power quality enhancement

Multivariable Robust Grid Currents Control of a Squirrel Cage Induction Generator Connected to a Wind Turbine

Optimisation of Wind System Conversion

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