scholarly journals Research on Frequency Adaptability of Doubly-fed Induction Generator under Asynchronous Power Grid

2018 ◽  
Vol 186 ◽  
pp. 012004
Author(s):  
Tingyi He ◽  
Shengnan Li ◽  
Shuijun Wu ◽  
Junzhen Peng ◽  
Xiaoyu Guo
Keyword(s):  
Power Grid ◽  
Induction Generator ◽  
Doubly Fed Induction Generator ◽  
Doubly Fed

Modeling and Simulation of a Grid with a Doubly Fed Induction Generator

2012 ◽  
Vol 424-425 ◽  
pp. 170-173
Author(s):  
Hui Shen Zhang ◽  
Ge Xiang Zhang ◽  
De Lin Wang
Keyword(s):  
Simulation Model ◽  
Vector Control ◽  
Transient Stability ◽  
Short Circuit ◽  
Power Grid ◽  
Effective Control ◽  
Induction Generator ◽  
Doubly Fed Induction Generator ◽  
Operating Characteristics ◽  
Doubly Fed

This paper establishes a simulation model for a doubly fed induction generator (DFIG) connected with a power grid by using the vector control scheme. The model consists of a wind turbine, a doubly fed generator, power converters and a vector control strategy. The simulation model is built by using PSCAD/EMTDC. We also investigate the operating characteristics of a grid with the DFIG by considering respective wind speed fluctuation and short-circuit fault in the grid. Experiment results verify the correctness of the simulation model and the relative stability in the operating process of the simulated grid. This work provides a useful simulation platform for further studying the transient stability of the DFIG connected with power grid and more effective control strategies

scholarly journals Rotor Current Feedback Based Direct Power Control of a Doubly Fed Induction Generator Operating with Unbalanced Grid

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3289
Author(s):  
Piotr Pura ◽  
Grzegorz Iwański
Keyword(s):  
Reference Frame ◽  
Low Voltage ◽  
Power Grid ◽  
Positive Influence ◽  
Induction Generator ◽  
Doubly Fed Induction Generator ◽  
Direct Power ◽  
Current Feedback ◽  
Stationary Reference Frame ◽  
Doubly Fed

The paper presents a decoupled direct power-controlled (DPC) of a doubly fed induction generator (DFIG) connected to an unbalanced power grid, executed in an orthogonal stationary reference frame related to the stator side. The control allows to maintain constant electromagnetic torque despite stator connection to the unbalanced power grid and to achieve controllable low-voltage ride through (LVRT) capability. The control does not require any signal decomposition into positive and negative sequence order, which allows to reduce its complexity and computational requirements. Then, the paper presents positive influence of rotor current feedback in the stator-controlled reference frame on control performance. It facilitates significant transient reduction and minor steady state control improvement. All the mentioned functionalities were validated both in simulation and in laboratory conditions and the obtained results are described in the paper.

Research on Rotor over-Current of a Doubly-Fed Induction Generator under Power Grid Fault

2013 ◽  
Vol 805-806 ◽  
pp. 397-401
Author(s):  
Zhuo Chen ◽  
Zheng Hang Hao
Keyword(s):  
Control Strategy ◽  
Power Grid ◽  
Power Converter ◽  
Induction Generator ◽  
Doubly Fed Induction Generator ◽  
Prior Art ◽  
Control Scheme ◽  
Additional Protection ◽  
Doubly Fed ◽  
Vector Control Strategy

This paper showed that the doubly-fed induction generator (DFIG) was sensitive to the faults of power grid. Through theoretic analysis for active power characteristic of DFIG, it was recognized that the conventional PI-based vector control strategy was likely to cause the excitation system overregulated due to lack of additional protection technique. On this condition, a DFIG risks damaged to its power converter due to overcurrent or overvoltage. At the basis of prior art, this paper developed a novel control scheme, which focused on solving overregulated problems caused by faults of power grid. The proposed control strategy was tested on an illustration DFIG-based power system modeled by MATLAB/SIMULINK. The results demonstrate that the proposed control scheme can effectively resist overcurrent under the conditions of both symmetrical and unsymmetrical grid faults.

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