Analysis and impacts of implementing
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This document discusses a project analyzing the impacts of implementing droop control in doubly-fed induction generator (DFIG) wind turbines on microgrid and weak grid stability. Currently, conventional DFIG control does not allow wind turbines to participate in frequency regulation. The project aims to address this issue through detailed analysis of droop-controlled DFIG units in microgrids. Simulation and hardware tools like MP Lab, Orcad/Pspice, and MATLAB/Simulink were used to study the outputs.
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This document summarizes a research paper about providing voltage stability support for doubly fed induction generator (DFIG) wind turbines connected to weak power grids. It introduces DFIG technology and describes the modeling and control of the DFIG, including its rotor side converter control strategy. It then analyzes the short circuit current contribution of DFIG wind turbines during faults using crowbar and DC chopper protection. The objectives are to analyze fault current, investigate voltage profiles during subtransmission and medium voltage faults, and develop methods to improve voltage support from wind farms during grid disturbances.
H011117484
This document discusses two improved protection schemes for doubly fed induction generator (DFIG) based wind turbines during grid faults. It begins with background on how grid faults negatively impact DFIG wind turbines by causing stator and rotor overcurrents, DC-link overvoltage, torque oscillations, and active/reactive power fluctuations. It then presents two proposed protection schemes - a series resistor scheme that limits rotor overcurrent by inserting a resistor during faults, and a crowbar and DC-chopper scheme that uses crowbar resistors and a DC chopper to limit overcurrent and overvoltage. The document compares simulations of these schemes under symmetrical and asymmetrical grid faults to evaluate their effectiveness in improving DFIG performance during faults.
L45016771
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
G42022933
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Dh4301636643
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
40220140505005
This paper reviews technologies for enhancing the low voltage ride through (LVRT) capability of wind farms using induction generators. It analyzes how FACTS controllers like STATCOMs or MERs can improve LVRT capability compared to thyristor controlled static var compensators (SVCs). It proposes using transient stability margin as an indicator of LVRT capability and describes a torque slip characteristic approach for estimating the rating of compensation devices needed to ensure stability after a fault. The paper also discusses different wind generator types, LVRT technologies like active crowbars and energy storage, and the role of grid codes in technical requirements for connecting wind farms to the grid.
40220140505005
This paper reviews technologies for enhancing the low voltage ride through (LVRT) capability of wind farms using induction generators. It analyzes how FACTS controllers like STATCOMs or MERs can improve LVRT capability compared to thyristor controlled static var compensators (SVCs). It proposes using transient stability margin as an indicator of LVRT capability and describes a torque slip characteristic approach for estimating the rating of compensation devices needed to ensure stability after a fault. The paper also discusses different wind generator types, LVRT technologies like active crowbars and energy storage, and the role of grid codes in technical requirements for connecting wind farms to the grid.
IRJET- Improvement of Wind Turbine DFIG using Fault Ride Through Capability T...
This document discusses techniques for improving the fault ride-through capability of doubly fed induction generator (DFIG) wind turbines. It begins with an introduction to DFIG wind turbines and discusses challenges during grid faults. It then presents an active crowbar protection system to reduce high rotor currents and voltages during faults. The crowbar works by bypassing the rotor circuit when faults are detected. Fault detection methods like current threshold monitoring are also examined. Simulation results show the crowbar technique helps DFIG wind turbines stay connected to the grid during faults and resume normal operation quickly after faults clear. The paper concludes the crowbar protection and control strategies improve the low voltage ride-through capability of DFIG wind turbines.
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The document reviews different converter topologies employed for transformer-less photovoltaic systems, comparing their efficiencies, leakage currents, and output current quality under different modulation techniques. It discusses grid integration requirements for photovoltaic systems in India such as voltage fluctuations, frequency range, power quality issues, anti-islanding functions, and synchronization. Grid connected photovoltaic systems can be with or without transformers.
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IRJET- Controlling the Stator Flux Linkages to Improve Dynamic Behavior of Gr...
This document summarizes a research paper that proposes a new control strategy to improve the low voltage ride-through (LVRT) capability of doubly fed induction generator (DFIG) wind turbines during grid faults. The strategy aims to mitigate voltage and current shocks on the rotor side by controlling the stator flux linkages. It does this by applying active control to the DC component of the stator current to accelerate the decay of the stator's DC flux linkage, which induces oscillations on the rotor during faults. Simulation results show the proposed method regulates the DC bus voltage and dampens torque oscillations, improving dynamic behavior compared to conventional control strategies.
Clean energy microgrids - Hype or Reality?
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Wind Power Plant Planning And Commisioning
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Stability check of doubly fed induction generator (DFIG) micro grid power system
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Application of crowbar protection on dfig based wind turbine connected to grid-2
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Analysis and impacts of implementing
- 1. Analysis and Impacts of Implementing Droop Control in DFIG-Based Wind Turbines on Microgrid/Weak- Grid Stability Presented by IIS TECHNOLOGIES No: 40, C-Block,First Floor,HIET Campus, North Parade Road,St.Thomas Mount, Chennai, Tamil Nadu 600016. Landline:044 4263 7391,mob:9952077540. Email:info@iistechnologies.in, Web:www.iistechnologies.in www.iistechnologies.in
- 2. ABSTRACT • Wind energy is going to be a significant part of electric energy generation in the very near future. • However, in addition to its intermittent nature that could lead to major difficulties for power system reliability and stability, the conventional control applied to wind turbines and their generators, usually doubly-fed induction generators (DFIGs), does not allow them to participate in frequency regulation, whether short or long term. • Moreover, the use of wind generators for autonomous frequency regulation is becoming an essential objective in power grids with reduced inertia and isolated microgrid operation. • While droop-control is suggested by many researchers to solve these problems, detailed analysis of droop-controlled DFIG units in microgrids has been reported in this project. www.iistechnologies.in
- 4. TOOLS AND SOFTWARE USED: • MP LAB • ORCAD/PSPICE • MATLAB/SIMULINK www.iistechnologies.in
- 6. Contact IIS TECHNOLOGIES No: 40, C-Block,First Floor,HIET Campus, North Parade Road,St.Thomas Mount, Chennai, Tamil Nadu 600016. Landline:044 4263 7391,mob:9952077540. Email:info@iistechnologies.in, Web:www.iistechnologies.in www.iistechnologies.in