This paper has presented comprehensive modeling of direct driven five-phase PMSG based grid-connected wind turbines along with the control schemes of the interfacing converters. Wind speed estimation has been achieved based on measured rotor speed. Five-phase to three-phase interface power converter based back-to-back common dc-link converter has been used to achieve the system objectives. The machine side converter (MSC) is used to track the maximum power point at different wind speed. The grid side converter (GSC) uses a vector current controller to inject pure active power to the grid. The effectiveness of proposed control scheme is validated through extensive simulation results by using MATALB/SIMULINK.

/pdf/mppt-control-technique-for-direct-drive-five-phase-pmsg-wind-1od45tidbb.pdf

MPPT Control Technique for Direct-Drive Five-Phase PMSG Wind Turbines with Wind Speed Estimation

This paper presents a modified shifted-level pulse width modulation (PWM) for an 11-level multilevel inverter (MLI) that used for distributed generation systems and medium and high power energy conversion systems applications because of the flexibility in the voltage level that this converter has been introduced. This converter employs five independent DC sources to generate the eleven output voltage levels considering a reduced number of switching devices. The proposed switching control arrange the switching devices to synthesize the multilevel output voltage. The MMLI structure consisted of traditional H-Bridge as the main converter and aiding circuit that used to form the multilevel of the output voltage according to the proposed switching technique. The gains of this converter is that it presents a topology for increasing the output voltage levels in the simultaneously with a decrements of the switching devices, the switching losses as well as low level of THD. The validity of the presented MLI are verified by both computer simulation using MATLAB Simulink© and real-time simulation (RTS) with the aid of dSPACE hardware.

A Study of Level-Shifted PWM Single-phase 11-Level Multilevel Inverter

The main consideration of this paper is focused on the estimation of the wind speed in variable speed wind turbine that drives a permanent magnet synchronous generator. Intelligent approaches are u...

Wind speed forecasting techniques for maximum power point tracking control in variable speed wind turbine generator

This paper investigates the steady-state and dynamic performance of three-phase Indirect Matrix Converter (IMC) used in wind energy conversion system (WECS) based on permanent magnet synchronous machine (PMSM). For the wind turbine, the proposed control is the maximum power point tracking algorithm based on optimum torque control loop (OTC). The voltage-oriented controller combined with space vector modulation (VOC-SVM) control algorithm is proposed. The validation of the modulation process is successfully performed. Simulation results present a good dynamic response and excellent performance and verify the effectiveness of the adopted control strategy of the IMC under wind speed variation.

Voltage Oriented Control of Indirect Matrix Converter Applied to Wind Energy Conversion System using PMSM Generator

The efficiency of the power generated from a Wind Energy Conversion System (WECS) can be maximized for a particular wind speed if the generator is driven at the optimal speed. For optimal operating point, a Maximum Power Point Tracking (MPPT) controller should be used. However, the variation of wind speed leads to difficulty in MPPT's control. In this paper, adaptive control techniques for determining the optimal operating point are presented and MPPT control, based on Adaptive Perturbation and Observation (APO) techniques, is proposed. The performances of the WECSs using the proposed adaptive control techniques are verified using numerical simulations. Furthermore, a comparison between these performances with those obtained using a Conventional Perturbation and Observation (CPO) controller is made, which results in that the proposed APO control techniques achieve better performance for MPPT control.

Adaptive Maximum Power Tracking Control Technique for Wind Energy Conversion Systems

With continuous increasing concerns of the energy issues, renewable energy sources are getting much attention worldwide This paper presents a full description of the grid-tie Wind Energy Conversion System (WECS) based on interfacing a Permanent Magnet Synchronous Generator (PMSG) to the utility grid by using the direct AC/AC matrix converter Due to the random variation of wind velocities, wind speed estimation control technique is used to estimate the wind velocity and extracts the maximum power at all wind velocities The matrix converter controls the maximum power point tracking MPPT by adjusting the PMSG terminal frequency, and hence, the shaft speed In addition, the matrix converter controls the grid injected current to be in-phase with the grid voltage for the unity power factor Space Vector Modulation is used to generate the PWM signals of the matrix converter switches The MPPT algorithm is included in the speed control system of the PMSG The system dynamic performance is investigated using Matlab/Simulink

/pdf/three-phase-matrix-converter-applied-to-wind-energy-1ahyja01hp.pdf

Three-phase Matrix Converter Applied to Wind Energy Conversion System for Wind Speed Estimation

This paper presents a comprehensive study of Matrix Converter (MC) operating as a controlled voltage source. Space-vector modulation is applied to make use of its inherent features over other modulation techniques. In addition, MC is employed to convert the fixed input voltage parameters of magnitude and frequency into controllable output voltages. The AC/AC matrix converter has been chosen for this process because of its inherent features over traditional converters such as the reduced harmonics in both output and input sides. The Matlab/SIMULINK platform is applied to simulate and investigate the system performance based on changes in both magnitude and frequency of the passive load current. To investigate the validity of the simulation results a laboratory prototype has been carried out.

Experimental investigation of three-phase AC/AC matrix converter based space-vector modulation with passive load

This paper presents comprehensive modelling ofWind Energy Conversion System (WECS) based on interfacing a Permanent Magnet Synchronous Generator (PMSG) to the utility grid by using the direct AC/AC matrix converter. To estimate the wind velocity and extracts the maximum power at all wind velocities Wind speed estimation control technique is presented based on sliding mode control. Sliding mode controller has many advantages such as fast transient response and robustness against system parametric variations and unknown external disturbances. The matrix converter controls the maximum power point tracking MPPT by adjusting the PMSG terminal frequency, and hence, the shaft speed. In addition, the matrix converter controls the grid injected current to be in-phase with the grid voltage for the unity power factor. Space Vector Modulation is used to generate the PWM signals of the matrix converter switches. The system dynamic performance is investigated using Matlab/Simulink.

https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajme.20160205.11.pdf

Alaa Eldien M. M. Hassan

Papers

Three-phase Matrix Converter Applied to Wind Energy Conversion System for Wind Speed Estimation

Experimental investigation of three-phase AC/AC matrix converter based space-vector modulation with passive load

Three-Phase Matrix Converter Based Sliding Mode Controller Applied to Wind Energy Conversion System with Wind Speed Estimation