Parameterization of a synchronous generator to represent a doubly fed induction generator with chopper protection for fault studies

Wind Energy ◽  
2011 ◽  
Vol 14 (1) ◽  
pp. 107-118 ◽  
Author(s):  
Jorge Martínez ◽  
Philip C. Kjaer ◽  
Pedro Rodriguez ◽  
Remus Teodorescu
Keyword(s):  
Synchronous Generator ◽  
Induction Generator ◽  
Doubly Fed Induction Generator ◽  
Doubly Fed

scholarly journals Oscillation Damping for Wind Energy Conversion System with Doubly Fed Induction Generator Association with Synchronous Generator

Energies ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 5067
Author(s):  
Farag K. Abo-Elyousr ◽  
Hossam S. Abbas ◽  
Ali M. Yousef ◽  
Nguyen Vu Quynh ◽  
Ziad M. Ali ◽  
...  
Keyword(s):  
Power System ◽  
Energy Conversion ◽  
Synchronous Generator ◽  
Induction Generator ◽  
Doubly Fed Induction Generator ◽  
Rotor Speed ◽  
Linear Quadratic ◽  
Interconnected Power System ◽  
Wind Energy Conversion ◽  
Doubly Fed

The main purpose of this paper is to enhance the operation of renewable wind energy conversion (WEC) systems connected to power systems. To achieve this, we consider a linear quadratic Gaussian (LQG) control approach for regulating the effects of a WEC system with doubly fed induction generator (DFIG) on the synchronous generator (SG) rotor speed of the interconnected power system. First, we present the mathematical formulation of the interconnected power system comprises a single synchronous generator and a wind turbine with DFIG connected to an infinite bus bar system through a transmission line. We consider that the system is operated under various loading conditions and parameters variation. Second, a frequency damping oscillation observer is designed via Kalman filtering together with an optimal linear quadratic regulator to mitigate the impacts of the WEC system on the SG rotor speed. The performance of the developed interconnected power system is simulated using a MATLAB/SIMULINK environment to verify the effectiveness of the developed controller. In comparison with previously reported results, the proposed approach can stabilize the interconnected power system within 1.28 s compared to 1.3 s without the DFIG.

scholarly journals Effect of Grid Faults on Dominant Wind Generators for Electric Power System Integration:A Comparison and Assessment

2021 ◽  
pp. 70-78
Author(s):  
M. M. Metwally ◽  
M. K. Ratib ◽  
M.M. Aly ◽  
A.M. Abdel‑Rahim
Keyword(s):  
Permanent Magnet ◽  
Electric Power ◽  
Synchronous Generator ◽  
Induction Generator ◽  
Doubly Fed Induction Generator ◽  
Permanent Magnet Synchronous Generator ◽  
Wind Generators ◽  
Squirrel Cage ◽  
Squirrel Cage Induction Generator ◽  
Doubly Fed

In recent times, various types of wind generators have been linked to the power grids globally and the focus has been to control them to be more efficient and reliable. This study concisely discusses performance analysis, modeling, and assessment of different wind generators (permanent magnet synchronous generator, doubly-fed induction generator, squirrel cage induction generator), covering their benefits, drawbacks, and impact on the electric power systems. This comparison aims to guarantee that their technical and economic evaluations are comparable, allowing engineers to make a more informed decision about which generator is best suitable for their installation. Findings for the investigated wind generators lead to significant observations about their application fields, such as permanent magnet synchronous generator outperforms doubly-fed induction generator and squirrel cage induction generator, especially during grid disruptions; on the other hand, squirrel cage induction generator is simple and inexpensive.

Study on the Transient Power Angle Characteristic of Doubly-Fed Induction Generator

2014 ◽  
Vol 960-961 ◽  
pp. 580-585
Author(s):  
Qiang Yu ◽  
Can Ping Yu ◽  
Hua Dong Sun ◽  
Jun Yi ◽  
Xu Zhi Luo
Keyword(s):  
Power System ◽  
Synchronous Generator ◽  
Induction Generator ◽  
Doubly Fed Induction Generator ◽  
Transient Characteristics ◽  
Wind Generators ◽  
System A ◽  
Operational Characteristics ◽  
Doubly Fed ◽  
Definition Of

Doubly-fed induction generator (DFIG) wind turbine has become a mainstream machine of wind generators in China. As the different operational characteristics between the DFIG and synchronous generator (SG), the large amount of DFIG-based wind generators installed in the grid may bring a series of impacts on the dynamic behaviors of power system. In order to study the DFIG transient characteristics on the condition of the voltage dips happening in the power system, a definition of the DFIG power angle is given and the effects of the converters on the DFIG power angle are discussed. On this basis, the transient angle characteristic of the DFIG is derived. The DFIG transient characteristics are performed by Matlab/Simulink software, the simulation results demonstrate that the DFIG has the resemble power angle characteristic of SG and prove the effectiveness of the derivation process, which lay a foundation for the study on the interactions between the DFIG and power system.

scholarly journals Multi-Target Control Strategy of DFIG Using Virtual Synchronous Generator Based on Extended Power Resonance Control under Unbalanced Power Grid

Energies ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2232
Author(s):  
Dan Sun ◽  
Yangming Wang ◽  
Tianlong Jiang ◽  
Xiaohe Wang ◽  
Jun Sun ◽  
...  
Keyword(s):  
Synchronous Generator ◽  
Induction Generator ◽  
Doubly Fed Induction Generator ◽  
Electromagnetic Torque ◽  
Stator Current ◽  
Unbalanced Voltage ◽  
Doubly Fed ◽  
Unbalanced Grid ◽  
Extended Power ◽  
Virtual Synchronous Generator

Virtual synchronous generator control is considered as an effective solution to optimize the frequency response characteristics of doubly fed induction generator. However, due to the insufficient control bandwidth of the original virtual synchronous generator, it has little control effect over the oscillating components of the power caused by the unbalanced grid voltage. Therefore, long-term unbalanced voltage will cause a series of problems, such as distortion of stator and rotor currents, as well as oscillations of power and electromagnetic torque, which seriously affect the power quality and the operating performance of the doubly fed induction generator. To solve these problems, the concept of extended power is introduced, and the second-order generalized integrator-based resonant controller is used to control the extended power and traditional power. Control targets of the extended power method are discussed and extended, so that the doubly fed induction generator system using extended power resonant control-based virtual synchronous generator control can realize three different control targets under the unbalanced grid condition. The three control targets are: balanced and sinusoidal stator current, sinusoidal stator current and constant active power, and sinusoidal stator current and constant reactive power and electromagnetic torque. The three control targets can also be flexibly switched according to the real-time requirements of the grid with unbalanced voltage. The simulation results verify the effectiveness of the control method.

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