Optimal Control Strategy Based Multilevel Matrix Converter for Wind Power Generation System (original) (raw)
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Analysis of optimized multilevel matrix converter for DFIG based wind energy conversion system
Indonesian Journal of Electrical Engineering and Informatics (IJEEI), 2021
Wind power generation is an increasing trend worldwide. Multilevel converters in this regard are playing an essential role in high power system applications due to various features. In this paper, multi-objective optimization based multilevel matrix converter (MOMMC) is proposed for wind energy conversion system. The assessment of feasibility through the discussion of two objectives: reliability and cost have been considered in this study. Initially, the model of the two objectives is assessed against redundancy configuration and power loss. Then a multi-objective function is defined for achieving low cost and high reliability. The optimal topology for the matrix multi-level converter is determined using the membership function, and the solution is selected from the Pareto-optimal set. The reliability and cost analysis of the proposed MOMMC is performed. Simulation is carried out for the proposed multiobjective optimization based multilevel matrix converter using the PSIM software. To establish the validity of the proposed method, two different cases: 1) fixed and 2) variable speed of 9 MW doubly-fed induction generator-based wind energy system are considered. Finally, a comparison is carried out for the two cases of the proposed method. The results show the superiority of the proposed method and are suitable for wind energy conversion systems.
International Journal of Electrical Power & Energy Systems, 2013
Nowadays, the power generation systems based on wind turbines is increasing continuously in the world. Hence, there are intense efforts provided by researchers for the development of this area. In high power system applications, multilevel converters are a competitive alternative to the two-level inverters. In this paper, a three-level sparse matrix converter (SMC3l) associated to a grid connected variable speed wind generation (VSWG) scheme using a doubly fed induction generators (DFIGs) is investigated. Therefore, the dynamic behavior of a wind generator, including models of the wind turbine, DFIG, SMC3l control algorithm and power control is studied. Simulation results of the dynamic models of the wind generator are presented, for different operating modes sub-synchronous, synchronous and hyper-synchronous, to show the good performance and the efficiency control enhancement of the VSWG system using the proposed SMC3l.
Control of Wind Energy Conversion Systems Based on the Modular Multilevel Matrix Converter
IEEE Transactions on Industrial Electronics, 2017
The nominal power of single Wind Energy Conversion Systems (WECS) has been steadily growing, reaching power ratings close to 10MW. In the power conversion stage, medium-voltage power converters are replacing the conventional low-voltage back-to-back topology. Modular Multilevel Converters have appeared as a promising solution for Multi-MW WECSs, due to their modularity, and the capability to reach high nominal voltages. This paper discusses the application of the Modular Multilevel Matrix Converter (M 3 C) to drive Multi-MW WECSs. The modelling and control systems required for this application are extensively analysed and discussed in this paper. The proposed control strategies enable decoupled operation of the converter, providing maximum power point tracking (MPPT) capability at the generator-side, grid code compliance at the grid-side [including Low Voltage Ride Through Control (LVRT)], and good steady state and dynamic performance for balancing the capacitor voltages in all the clusters. Finally, the effectiveness of the proposed control strategy is validated through simulations and experimental results conducted with a 27 power-cell prototype.
IJERT-Wind Energy Conversion System Performance Is Improved Using Integrated Multilevel Converter
International Journal of Engineering Research and Technology (IJERT), 2013
https://www.ijert.org/wind-energy-conversion-system-performance-is-improved-using-integrated-multilevel-converter https://www.ijert.org/research/wind-energy-conversion-system-performance-is-improved-using-integrated-multilevel-converter-IJERTV2IS70541.pdf Frequency converters are used in wind turbines because they make it possible to apply the variable-speed concept. They also make it possible for wind farm to become active element in the power system. The traditional frequency converter is back-toback connected two-level converter, in which the output voltage has two possible values. In this paper, maximum power control of wind turbine and permanent magnet synchronous generator connected with five level threephase flying-capacitor multilevel converter to grid are studied. This converter allows higher power handling, potentially lower power loss, lower harmonic distortion and hence less filtering requirements when compared with two-level converter.
Comparative study of two PWM control wind system based on DFIG and multilevel NPC inverter
2019
The present paper is a comparative study of two supplying modes of a wind energy conversion system (WECS) based on Doubly Fed Induction Generator (DFIG). This work is conducted with a multi-level neutral-point inverter (NPC) supplying a DFIG. The first method based on conventional pulse width modulation (PWM) while the second is based on space vector modulation (SVM). This work aimed to control active and reactive power delivered to the electrical networks and satisfying the distribution requirements. The performance evaluation of each method is performed using spectral analysis to calculate total harmonic distortion (THD). Simulation results have showed that the harmonic rate (THD) is reduced. Therefore; the quality of the produced power by this type of wind chain is efficient. The results obtained with SVM have revealed that this technique uses inverter DC bus voltage more efficiently, reduces power losses and minimizes torque ripples. Keywords: DFIG, NPC, Multilevel, PWM, THD, Po...
Comparative Study of Wind Energy Conversion SystemDriven by Matrix Converter and AC/DC/AC Converter
2016
In this work we presents comparative study of avariable speed wind energy conversion system (WECS) basedon the doubly fed induction generator (DFIG) driven by twoAC/DC/AC converters and WECS driven by matrix converter(MC). The whole system is presented in d-q-synchronousreference frame. For this purpose, the control of the activeand reactive power using PI controller is verified usingsoftware Matlab/Simulink, studies on a 1.5 MW DFIG windgeneration system. Simulation results obtained are presentedand analyzed. The results show the high performance andimprove the electric energy of the control strategy adopted inthe WECS based on a DFIG driven by a MC.
2015 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA), 2015
This paper proposes a control scheme for a wind turbine using a DFIG electromechanical converter, implemented through an NPC three-level back to back converter, that keeps a unitary power factor injection to the grid and maximizes the energy harvested from wind, using a maximum power point tracking algorithm (MPPT). A predictive direct power control (DPC) strategy drives the grid-side converter, to maintain the DC bus reference voltage. Whereas, a predictive direct torque control (DTC) strategy drives the machine-rotor-side converter, to control the power extraction, the power factor and balancing of the DC bus capacitors. The developed model allows to study the wind energy conversion system (WECS) for energy harvesting, rotor dynamics and power quality analysis. Simulation results endorse the effectiveness of the advanced control techniques for the whole wind spectrum, including the pitch angle control. A sensitivity analysis shows that the predictive DTC control strategy is robust with an uncertainty up to 20% of the induction machine parameters.
Power Control of DFIG Driven by Matrix ConverterUnder Super and Sub Synchronous OperationModes
2017
In this paper, we present the modeling and control of the wind energy conversion systemsbased on the doubly fed induction generator fed by AC/AC matrix converter. Firstly, wedeveloped the models of the different elements of the conversion chain. After, we consider thevector control strategy of the active and reactive powers in order to ensure an optimum operation.Finally, the dynamic model of a doubly fed induction generator and wind turbine grid connectedsystem is determined in the d-q synchronous reference frame.Therefore, the powers control isverified using software Matlab/Simulink. The behaviours of the sub-synchronous and supersynchronous operation modes is presented and discussed. The results prove that the power controlstrategy is well adapted to this kind of system.