Transient stability of DFIG wind turbines at an external short-circuit fault

Wind Energy ◽  
2005 ◽  
Vol 8 (3) ◽  
pp. 345-360 ◽  
Author(s):  
Tao Sun ◽  
Zhe Chen ◽  
Frede Blaabjerg
Keyword(s):  
Wind Turbines ◽  
Transient Stability ◽  
Short Circuit ◽  
Short Circuit Fault

Variable-Speed Wind Turbines with Doubly-Fed Induction Generators Part III: Model with the Back-to-back Converters

2003 ◽  
Vol 27 (2) ◽  
pp. 79-91 ◽  
Author(s):  
Vladislav Akhmatov
Keyword(s):  
Wind Turbines ◽  
Short Circuit ◽  
Practical Investigations ◽  
System Stability ◽  
Variable Speed ◽  
Induction Generators ◽  
Doubly Fed Induction Generators ◽  
Set Up ◽  
Doubly Fed ◽  
Short Circuit Fault

A model of the back-to-back converter is set up and implemented in the simulation tool PSS/E as a user-developed model. This model is applied with that of the doubly-fed induction generator (DFIG), described in previous parts of this work [parts II and I]. The latter models variable-speed wind turbines in power stability investigations. Subjected to a short circuit fault, there will be a risk of converter blocking, followed by tripping of the wind turbine [1, 3]. The main reasons of blocking are over-current in the rotor converter and over-voltage in the dc-link. The DFIG model, with representation of the back-to-back converter, results in (a) more accurate replication of the current in the rotor converter and (b) improved computation of the dc-link voltage. These improvements are compared with the model with representation of the rotor converter only. Hence, the DFIG model with representation of the back-to-back converters might be preferred, in practical investigations of power system stability, to models with representation of the rotor converter only.

Symmetrical Short Circuit Current Characteristics of Doubly Fed Induction Generator Wind Turbine with Crowbar Protection

2012 ◽  
Vol 512-515 ◽  
pp. 782-787
Author(s):  
Jia Jun Zhai ◽  
Bu Han Zhang ◽  
Kui Wang ◽  
Wen Shao ◽  
Cheng Xiong Mao
Keyword(s):  
Wind Turbine ◽  
Wind Turbines ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Induction Generator ◽  
Doubly Fed Induction Generator ◽  
Operating Characteristics ◽  
Doubly Fed ◽  
Crowbar Protection ◽  
Short Circuit Fault

Doubly fed induction generator (DFIG) is now becoming one of most widely used wind turbines in global market for wind power generation, due to its outstanding advantages. However, the DFIG is sensitive to grid faults. The DFIG will have to be removed from the grid if there’s no protection appliance in it. Therefore, the crowbar protection is widely used in the world for improving the low voltage ride-through ability of wind turbines. This paper analysed the operating characteristics and short-circuit current of DFIG under symmetrical short-circuit fault with respect to different sags to grid voltage, which on the basis of DFIG wind turbine with crowbar protection. And the expressions of short-circuit current under symmetrical short-circuit fault for DFIG were derived. The effectiveness of the expression was simulated in PSCAD/EMTDC.

scholarly journals Inter-Turn Short-Circuit Fault Ride-Through for DFIG Wind Turbines

2020 ◽  
Vol 53 (2) ◽  
pp. 12757-12762
Author(s):  
Kuichao Ma ◽  
Jiangsheng Zhu ◽  
Mohsen Soltani ◽  
Amin Hajizadeh ◽  
Zhe Chen
Keyword(s):  
Wind Turbines ◽  
Short Circuit ◽  
Fault Ride Through ◽  
Short Circuit Fault

scholarly journals Nonlinear Variable Resistor-Based FCL for Fault Ride-Through Performance Enhancement of DFIG-Based Wind Turbines

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Mehdi Firouzi ◽  
Mohammadreza Shafiee ◽  
Mojtaba Nasiri
Keyword(s):  
Wind Turbines ◽  
Performance Enhancement ◽  
Short Circuit ◽  
Variable Resistor ◽  
Fault Ride Through ◽  
Three Phase ◽  
Bridge Type ◽  
Doubly Fed ◽  
Grid Side ◽  
Short Circuit Fault

Fault ride-through (FRT) requirement is a matter of great concern for doubly fed induction generator (DFIG-) based wind turbines (WTs). This study presents a nonlinear variable resistor- (NVR-) based bridge-type fault current limiter (BFCL) to augment the FRT performance of DFIG-based WTs. First, the BFCL operation and nonlinear control design consideration of the proposed NVR-based BFCL are presented. Then, the NVR-BFCL performance is validated through simulation in PSCAD/EMTDC software. In addition, the NVR-based BFCL performance is compared with the fixed resistor- (FR-) based BFCL for a three-phase symmetrical short circuit fault at the grid side. Simulation results reveal that the NVR-based BFCL provides a smooth and effective FRT scheme and outperforms the FR-based BFCL.

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