A 3-Ф grid connected wind system with a technique of DC link control using fewer sensors with fuzzy controller

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
D. Naveen Kilari ◽  
A. Hema Sekhar ◽  
N. Sudhakar Reddy ◽  
N.P. Dharani
Keyword(s):  
Wind Turbine ◽  
Fuzzy Controller ◽  
Synchronous Generator ◽  
Maximum Energy ◽  
Effective Control ◽  
Content Type ◽  
Point Tracking ◽  
Power Point ◽  
Grid Side ◽  
Grid Side Converter

PurposeThis paper aims to provide a permanent magnet synchronous generator (PMSG) wind turbine, which feeds electric power (AC) to the power grid. The converter, located on the machine side, is used to produce the full amount of wind power. Research on wind energy conversion system (WECS) is carried out in this study using a direct wind turbine in MATLAB with constant and variable speeds.Design/methodology/approachThis paper is about WECS using PMSG and is connected to a grid of two serial converters with common DC connections.FindingsThis paper aims to provide the value of DC connection voltage at its base, regardless of the wind speed alterations, the inverter's output ac voltage can be kept constant.Originality/valueThis paper aims to provide a Hill Climb Search maximum power point tracking (MPPT) algorithm is an effective control system for extracting maximum energy, also called voltage control, pitch control, phase-locked loop (PLL) controls, from a wind turbine. Using the Fuzzy controller, the grid side converter is controlled.

A nonlinear control algorithm for a wind turbine

2015 ◽  
Vol 34 (6) ◽  
pp. 1863-1878 ◽  
Author(s):  
Merzak Aimene ◽  
Alireza Payman ◽  
Brayima Dakyo
Keyword(s):  
Nonlinear Control ◽  
Wind Turbine ◽  
Control Algorithm ◽  
Control Method ◽  
Synchronous Generator ◽  
Maximum Power ◽  
Content Type ◽  
Point Tracking ◽  
Grid Side ◽  
Reference Trajectories

Purpose – The purpose of this paper is to propose a new nonlinear control algorithm to control a wind turbine based on permanent magnet synchronous generator (PMSG) connected to the grid via a back-to-back converter. The control algorithm is composed of a flatness-based method for the machine side convertor (MSC) and a voltage-oriented method for the grid side converter (GSC). Design/methodology/approach – For the MSC control, the output variable is chosen properly to prove that the system is flat at first. Then, the appropriate reference trajectories are planned on its components. The reference trajectories are such designed that the system operates in maximum power point tracking (MPPT) mode. Finally, state feedback regulators are used to force the system output to follow its reference. To control the GSC, a classical voltage-oriented control method is used. Findings – The simulation results obtained with a random wind speed are presented in order to prove the validity of the proposed control algorithm. These results show that the system is controlled successfully while it operates in the MPPT mode or in its maximum power limitation mode. Originality/value – In this paper, a new algorithm based on flatness property is presented to control a variable speed wind turbine based on a PMSG. The proposed control method allows the system to operate in optimal operating modes.

scholarly journals Super-Twisting Sliding Mode Control for Gearless PMSG-Based Wind Turbine

Complexity ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-15 ◽  
Author(s):  
Mojtaba Nasiri ◽  
Saleh Mobayen ◽  
Quan Min Zhu
Keyword(s):  
Wind Turbine ◽  
Reactive Power ◽  
Low Voltage ◽  
Sliding Mode ◽  
Synchronous Generator ◽  
Voltage Regulation ◽  
Point Tracking ◽  
Chattering Free ◽  
Grid Codes ◽  
Grid Side

In recent years, the complexities of wind turbine control are raised while implementing grid codes in voltage sag conditions. In fact, wind turbines should stay connected to the grid and inject reactive power according to the new grid codes. Accordingly, this paper presents a new control algorithm based on super-twisting sliding mode for a gearless wind turbine by a permanent magnet synchronous generator (PMSG). The PMSG is connected to the grid via the back-to-back converter. In the proposed method, the machine side converter regulates the DC-link voltage. This strategy improves low-voltage ride through (LVRT) capability. In addition, the grid side inverter provides the maximum power point tracking (MPPT) control. It should be noted that the super-twisting sliding mode (STSM) control is implemented to effectively deal with nonlinear relationship between DC-link voltage and the input control signal. The main features of the designed controller are being chattering-free and its robustness against external disturbances such as grid fault conditions. Simulations are performed on the MATLAB/Simulink platform. This controller is compared with Proportional-Integral (PI) and the first-order sliding mode (FOSM) controllers to illustrate the DC-link voltage regulation capability in the normal and grid fault conditions. Then, to show the MPPT implementation of the proposed controller, wind speed is changed with time. The simulation results show designed STSM controller better performance and robustness under different conditions.

scholarly journals The maximum power point tracking based-control system for small-scale wind turbine using fuzzy logic

2020 ◽  
Vol 10 (4) ◽  
pp. 3927 ◽  
Author(s):  
Quang-Vi Ngo ◽  
Chai Yi ◽  
Trong-Thang Nguyen
Keyword(s):  
Control System ◽  
Wind Turbine ◽  
Fuzzy Controller ◽  
Maximum Power Point Tracking ◽  
Maximum Power ◽  
Small Scale ◽  
Maximum Power Point ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Power Point

This paper presents the research on small-scale wind turbine systems based on the Maximum Power Point Tracking (MPPT) algorithm. Then propose a new structure of a small-scale wind turbine system to simplify the structure of the system, making the system highly practical. This paper also presented an MPPT-Fuzzy controller design and proposed a control system using the wind speed sensor for small-scale wind turbines. Systems are simulated using Matlab/Simulink software to evaluate the feasibility of the proposed controller. As a result, the system with the MPPT-Fuzzy controller has much better quality than the traditional control system.

scholarly journals Modelling of a PMSG Wind Turbine with Autonomous Control

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Chia-Nan Wang ◽  
Wen-Chang Lin ◽  
Xuan-Khoa Le
Keyword(s):  
Wind Turbine ◽  
Power Flow ◽  
Pulse Width Modulation ◽  
High Efficiency ◽  
Synchronous Generator ◽  
Maximum Power ◽  
Autonomous Control ◽  
Voltage Source ◽  
Point Tracking ◽  
Grid Side

The aim of this research is to model an autonomous control wind turbine driven permanent magnetic synchronous generator (PMSG) which feeds alternating current (AC) power to the utility grid. Furthermore, this research also demonstrates the effects and the efficiency of PMSG wind turbine which is integrated by autonomous controllers. In order for well autonomous control, two voltage source inverters are used to control wind turbine connecting with the grid. The generator-side inverter is used to adjust the synchronous generator as well as separating the generator from the grid when necessary. The grid-side inverter controls the power flow between the direct current (DC) bus and the AC side. Both of them are oriented control by space vector pulse width modulation (PWM) with back-to-back frequency inverter. Moreover, the proportional-integral (PI) controller is enhanced to control both of the inverters and the pitch angle of the wind turbine. Maximum power point tracking (MPPT) is integrated in generator-side inverter to track the maximum power, when wind speed changes. The simulation results in Matlab Simulink 2012b showing the model have good dynamic and static performance. The maximum power can be tracked and the generator wind turbine can be operated with high efficiency.

scholarly journals Comparative study of maximum power point tracking algorithms for wind turbine using permanent magnet synchronous generator

2017 ◽  
Vol 20 (K3) ◽  
pp. 100-105
Author(s):  
Minh Quang Huynh ◽  
Liem Van Nguyen
Keyword(s):  
Wind Turbine ◽  
Permanent Magnet ◽  
Maximum Power Point Tracking ◽  
Synchronous Generator ◽  
Maximum Power ◽  
Maximum Power Point ◽  
Permanent Magnet Synchronous Generator ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Power Point

Wind power is more and more developed as a renewable energy source. It is very essential to extract the maximum available power from the wind by operating the wind turbine at its optimal operating condition, called maximum power point tracking (MPPT). Perturb & Observe (P&O) is the simplest and mostly used algorithm for this purpose. However, this algorithm has its own disadvantages such as oscillation at maximum power point and wrong directionality under fast variation wind speed. Lots of publications are presented to solve these problems. In this paper, a conventional P&O algorithm, a modified MPPT algorithm and a fuzzy MPPT algorithm for variable speed wind turbine using permanent magnet synchronous generator (PMSG) are tested and compared in the terms of complexity, speed responses and the ability to acquire the maximal energy output.

scholarly journals Grid Side Inverter Control for a Grid Connected Synchronous Generator Based Wind Turbine Experimental Emulator

2021 ◽  
Vol 23 (1) ◽  
pp. 1-7
Author(s):  
Dekali Zouheyr ◽  
Baghli Lotfi ◽  
Lubin Thierry ◽  
Boumediene Abdelmadjid
Keyword(s):  
Wind Turbine ◽  
Reactive Power ◽  
Synchronous Generator ◽  
Power Converter ◽  
Mechanical Coupling ◽  
Operating Modes ◽  
Vector Orientation ◽  
Grid Side ◽  
Grid Side Converter ◽  
And Control

This paper describes the real time implementation and control of a wind energy conversion chain emulator based on a synchronous generator (SG) using a full-scale power converter configuration. The proposed structure consists of the mechanical coupling of two 1.5 kW machines, a DC motor which emulates the static-dynamic behaviors of a three-blade wind turbine with a horizontal axis including an ideal gearbox, and a synchronous generator that ensures the electromechanical conversion and manages the different operating modes. The aim of the first part in this work is the design and the implementation of the control of the grid side converter in order to control the flow of the produced/consumed active and reactive power (PGSC / QGSC) in both directions between the generator and the grid. An improved experimental grid voltage vector-orientation control algorithm (VOC) is investigated and applied to the grid inverter to control the GSC powers independently and instantly. The control algorithms are implanted in C, using dSPACE DS1104 control board to drive the 6-IGBT’s inverter. The experimental results validate the effectiveness of the proposed control scheme of the GSC.

scholarly journals Power factor control in a wind energy conversion system via synchronous generator excitation

2021 ◽  
Author(s):  
Murad Jafari
Keyword(s):  
Power Factor ◽  
Synchronous Generator ◽  
Maximum Power Point ◽  
Wind Energy Conversion ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Energy Conversion System ◽  
Power Point ◽  
Grid Side ◽  
And Control

For high power wind turbines current sources converter (CSC) topologies offer favourable features such as a simple structure, grid friendly waveforms, and reliable grid short circuit protection. Several topologies have been proposed to achieve maximum power point tracking (MPPT) in a wind energy conversion system (WECS) and control the output power factor within a wide range of wind speeds. Some of these topologies are reviewed and a novel approach and control strategy is proposed. The proposed system consists of an electrically excited synchronous generator (EESG), a diode rectifier on the generator-side, and a pulse wave modulated (PWM) current source inverter (CSI) on the grid-side. In the proposed control scheme, the diode rectifier does not offer any control freedoms, therefore controlling the output power and the power factor falls on the EESG and the PWM CSI. The generator excitation is controlled according to the wind speed value to improve operation range whereby the desired grid side power factor can be maintained, while the control freedoms of the CSI are used to regulate the power output of the WECS and to perform maximum power point tracking (MPPT). Theoretical analysis was conducted to investigate the feasibility and limits of this approach and the factors affecting it, and computer simulations confirmed the validity of this approach, showing an improved wind speed range where the desired power factor was maintained.

scholarly journals Analysis and Performance Of Grid Connected Straight Driven Pmsg Based Wind Turbines

2021 ◽  
Vol 12 (2) ◽  
pp. 1304-1312
Author(s):  
Eswaraiah G, Et. al.
Keyword(s):  
Renewable Energy ◽  
Wind Turbine ◽  
Permanent Magnet ◽  
Control Strategy ◽  
Synchronous Generator ◽  
Optimization Techniques ◽  
Speed Ratio ◽  
Permanent Magnet Synchronous Generator ◽  
Grid Side ◽  
Grid Side Converter

Permanent-magnet synchronous generator (PMSG) are used widely in wind turbine applications. The performance analysis of PMSG can be enhanced by adopting a number of control mechanisms with the benefit of advanced optimization techniques. Renewable energy is harnessed from continuously replenishing natural processes. Some commonly known are sunlight, water, wind, tides, geothermal heat and various forms of biomass. The focus on renewable energy has over the past few decades intensified greatly. This paper presents modeling and control strategy for the grid connected wind turbine system based on Permanent Magnet Synchronous Generator (PMSG). The considered system is based on back-to-back converter topology. The Grid Side Converter (GSC) achieves the DC bus voltage control and unity power factor. The Machine Side Converter (MSC) assures the PMSG speed control. The PMSG is used as a variable speed generator and connected directly to the turbine without gearbox. The pitch angle control is not either considered in this study. Further, Optimal Tip Speed Ratio based MPPT control strategy is used to ensure the most energy efficiency whatever the wind speed variations. A filter (L) is put between the GSC and the grid to reduce current ripple and to improve the injected power quality.During grid faults, a hierarchical coordinated control scheme for the generator-side converter, main grid-side converter and auxiliary grid-side converter, depending on the grid voltage sags, is presented to enhance the low voltage ride through (LVRT) capability of the direct-driven PMSG WT.  

scholarly journals Power factor control in a wind energy conversion system via synchronous generator excitation

2021 ◽  
Author(s):  
Murad Jafari
Keyword(s):  
Power Factor ◽  
Synchronous Generator ◽  
Maximum Power Point ◽  
Wind Energy Conversion ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Energy Conversion System ◽  
Power Point ◽  
Grid Side ◽  
And Control

For high power wind turbines current sources converter (CSC) topologies offer favourable features such as a simple structure, grid friendly waveforms, and reliable grid short circuit protection. Several topologies have been proposed to achieve maximum power point tracking (MPPT) in a wind energy conversion system (WECS) and control the output power factor within a wide range of wind speeds. Some of these topologies are reviewed and a novel approach and control strategy is proposed. The proposed system consists of an electrically excited synchronous generator (EESG), a diode rectifier on the generator-side, and a pulse wave modulated (PWM) current source inverter (CSI) on the grid-side. In the proposed control scheme, the diode rectifier does not offer any control freedoms, therefore controlling the output power and the power factor falls on the EESG and the PWM CSI. The generator excitation is controlled according to the wind speed value to improve operation range whereby the desired grid side power factor can be maintained, while the control freedoms of the CSI are used to regulate the power output of the WECS and to perform maximum power point tracking (MPPT). Theoretical analysis was conducted to investigate the feasibility and limits of this approach and the factors affecting it, and computer simulations confirmed the validity of this approach, showing an improved wind speed range where the desired power factor was maintained.

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