scholarly journals Voltage Enhancement on DFIG Based Wind Farm Terminal During Grid Faults

2019 ◽  
Vol 9 (5) ◽  
pp. 4783-4788 ◽  
Author(s):  
P. D. Chung
Keyword(s):  
Wind Turbine ◽  
Wind Turbines ◽  
Wind Farm ◽  
Dynamic Voltage Restorer ◽  
Simulink Simulation ◽  
Voltage Restorer ◽  
Dynamic Voltage ◽  
In Series ◽  
Grid Side ◽  
Grid Side Converter

This paper proposes a method of retaining high enough voltage on the terminal of DFIG wind turbines during a fault interval on the connected grid. This method is developed by the ideal of dynamic voltage restorer equipment and was applied to a wind turbines group. The DC-link and the grid side converter of the first DFIG wind turbine in this group are utilized to support the other wind turbines. The converter is connected to a transformer, which is in series with the wind turbine group and the connected line, during an external fault. At the DC-link of the back-to-back converter of each DFIG wind turbine, a DC chopper is equipped to dissipate excessive active power during the fault interval. Moreover, the controllers of all wind turbines are modified to support all wind turbines in the group. The method is verified by MATLAB/Simulink. Simulation results implied that the proposed method can retain a high enough voltage on the terminal of DFIG while preventing overcurrent on the rotor side.

Efficient Approach to LVRT Capability of DFIG-Based Wind Turbines under Symmetrical and Asymmetrical Voltage Dips Using Dynamic Voltage Restorer

2017 ◽  
Vol 8 (2) ◽  
pp. 945 ◽  
Author(s):  
Kiarash Azizi ◽  
Murtaza Farsadi ◽  
Mohammad Farhadi Kangarlu
Keyword(s):  
Wind Turbines ◽  
Low Voltage ◽  
Normal Operation ◽  
Dynamic Voltage Restorer ◽  
Volume Weight ◽  
Voltage Restorer ◽  
Voltage Dips ◽  
Dynamic Voltage ◽  
In Series ◽  
Grid Side

<span>The capability of low-voltage ride-through (LVRT) of doubly fed induction generator (DFIG) has been considered as an essence for grid code requirements. Any unbalance on the grid side causes the rotor current of the generator to rise which leads to saturate the dc-link of the back-to-back converter or even destroy it. To meet this requirement, a dynamic voltage restorer (DVR) without dc-link energy storage elements is utilized to compensate any disturbance imposed to the DFIG wind turbine system. On the time of any disturbance or fault, DFIG and DVR are properly controlled in order to compensate the specified faulty phase uninterruptedly. DVR is connected in series to the grid and by injecting instantaneous compensating voltage, prevents the stator voltage from rapid changing; consequently, the rotor side converter can accomplish its normal operation. As voltage dips are the most common grid faults subjected to DFIGs, this paper investigates both symmetrical and asymmetrical voltage dips caused by grid faults. The independent and instantaneous phase voltage compensation, less volume, weight, and cost are the merits to utilize the proposed DVR along with DFIG wind turbines. PSCAD/EMTDC based simulations verifies the capabilities of the proposed technique for the LVRT capability of DFIG.</span>

scholarly journals Enhanced LVRT capability of Wind Turbine based on DFIG using Dynamic Voltage Restorer controlled by ADRC-based Feedback control

2021 ◽  
Vol 229 ◽  
pp. 01016
Author(s):  
El Mahfoud Boulaoutaq ◽  
Youssef Baala ◽  
Sana Mouslime ◽  
Mhand Oubella ◽  
Mustapha Kourchi ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Low Voltage ◽  
Dynamic Voltage Restorer ◽  
Output Terminal ◽  
Fault Ride Through ◽  
Disturbance Rejection Control ◽  
Voltage Restorer ◽  
Dynamic Voltage ◽  
In Series ◽  
Doubly Fed

For grid-connected DFIG-based wind turbine, Fault Ride Through (FRT) or Low Voltage Ride Through (LVRT) capability is vital problem that need to be improved. This paper proposes an Active Disturbance Rejection Control (ADRC) strategy applied to Doubly Fed Induction Generator (DFIG) based Wind turbine (WT), which integrates a Dynamic Voltage Restorer (DVR). The DVR connect in series the DFIG output terminal and the utility grid. The ADRC scheme of the new topology DFIG-based WT with integrated DVR is designed to compensate grid voltage disturbances, which in turn meet LVRT requirement and increase the level of wind power penetration. The performance of this WT-DFIG-DVR structure is investigated in different operating scenarios in order to show the skills of the designed controllers.

scholarly journals Improved Fault Ride Through Capability in DFIG Based Wind Turbines Using Dynamic Voltage Restorer With Combined Feed-Forward and Feed-Back Control

IEEE Access ◽  
2017 ◽  
Vol 5 ◽  
pp. 20494-20503 ◽  
Author(s):  
Rini Ann Jerin Amalorpavaraj ◽  
Palanisamy Kaliannan ◽  
Sanjeevikumar Padmanaban ◽  
Umashankar Subramaniam ◽  
Vigna K. Ramachandaramurthy
Keyword(s):  
Wind Turbines ◽  
Dynamic Voltage Restorer ◽  
Feed Forward ◽  
Fault Ride Through ◽  
Voltage Restorer ◽  
Dynamic Voltage ◽  
Combined Feed

scholarly journals Power Quality Improvement Using Dynamic Voltage Restorer on Grid-Connected Wind Energy System

2021 ◽  
Vol 23 (5) ◽  
pp. 401-407
Author(s):  
M. Praful Yadav ◽  
P. Sujatha ◽  
P.B. Kumar
Keyword(s):  
Wind Farm ◽  
Renewable Energy Sources ◽  
Wind Farms ◽  
Constant Speed ◽  
Wind System ◽  
Dynamic Voltage Restorer ◽  
Wind Generators ◽  
Fault Ride Through ◽  
Voltage Restorer ◽  
Dynamic Voltage

Reduction of fossil fuels and increasing technology made importance of wind generation as renewable energy sources. With increasing number of wind farms fed to grid increases grid fault issues due to various wind systems disconnected from grid during grid faults. To get better grid operation, wind farms are probable to be carried during disturbance related to grid faults extensively known as fault ride through capability. In proposed system a fault ride through method in wind farm management system connected to grid is investigated in term of critical clearing time. This paper examines the use of dynamic voltage restorer on the enhancement of fixed-speed wind generator systems. The controller capability performance, drive performance, and cost factor are considered. Simulation is performed using MATLAB Simulink for constant speed wind generators with closed-loop controller-based DVR are tested. The constant speed drive called synchronous generator-based wind system feed to an infinite bus system. Simulation results show the wind system with DVR has better fault ride-through capability other compensated voltages and is more efficient in minimizing voltage fluctuations called sag/swell and wind generator’s speed. Additionally, DVR aids wind generators to maintain voltage sag/swell with the grid limits requirements with economical as compared to other voltage compensating systems.

Improved fault ride through capability of DFIG-wind turbines using customized dynamic voltage restorer

2018 ◽  
Vol 39 ◽  
pp. 114-125 ◽  
Author(s):  
Sitharthan R. ◽  
Sundarabalan C.K. ◽  
Devabalaji K.R. ◽  
Sathees Kumar Nataraj ◽  
Karthikeyan M.
Keyword(s):  
Wind Turbines ◽  
Dynamic Voltage Restorer ◽  
Fault Ride Through ◽  
Voltage Restorer ◽  
Dynamic Voltage
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