Improving Fault Ride-Through Capability of Fixed-Speed Wind Turbine by Using Bridge-Type Fault Current Limiter

High penetration of Doubly Fed Induction Generator (DFIG) into existing power grid can attribute complex issues as they are very sensitive to the grid faults. In addition, Fault Ride Through (FRT) is one of the main requirements of the grid code for integrating Wind Farms (WFs) into the power grid. In this work, to enhance the FRT capability of the DFIG based WFs, a Bridge-Type Flux Coupling Non-Superconducting Fault Current Limiter (BFC-NSFCL) is proposed. The effectiveness of the proposed BFC-NSFCL is evaluated through performance comparison with that of the Bridge-Type Fault Current Limiter (BFCL) and Series Dynamic Braking Resistor (SDBR). Moreover, a dynamic nonlinear controller is also proposed for controlling the operation of the BFC-NSFCL. Extensive simulations are carried out in the MATLAB/SIMULINK environment for both symmetrical and unsymmetrical temporary as well as permanent faults. Based on the simulation results and different numerical analysis, it is found that the proposed nonlinear controller based BFC-NSFCL is very effective in enhancing the FRT capability of the WF. Also, the BFC-NSFCL outperforms the conventional BFCL and SDBR by maintaining a near-seamless performance during various grid fault situations.

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Improvement of Fault Ride Through Capability of DFIG-based Wind Turbine Systems Using Superconducting Fault Current Limiter

2019 IEEE Innovative Smart Grid Technologies - Asia (ISGT Asia) ◽

10.1109/isgt-asia.2019.8881155 ◽

2019 ◽

Author(s):

Muhammad Sarwar ◽

Babar Hussain ◽

Asad Hussain ◽

Muhammad Abubakar

Keyword(s):

Wind Turbine ◽

Fault Current ◽

Fault Current Limiter ◽

Superconducting Fault Current Limiter ◽

Fault Ride Through ◽

Current Limiter

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Transient Stability Improvement Analysis of DFIG Based Variable Speed Wind Generator Using IGBT- Bridge-Type Fault Current Limiter

SMART MOVES JOURNAL IJOSCIENCE ◽

10.24113/ijoscience.v7i1.345 ◽

2021 ◽

Vol 7 (1) ◽

pp. 29-39

Author(s):

Roshan Brahmwanshi ◽

Eknath Borkar

Keyword(s):

Wind Turbine ◽

Transient Stability ◽

Fault Current ◽

Fault Current Limiter ◽

Variable Speed ◽

Minimum Level ◽

Voltage Deviation ◽

Bridge Type ◽

Resistive Type ◽

Current Limiter

Due to its many advantages such as the improved power quality, high energy efficiency and controllability, etc. the variable speed wind turbine using a doubly fed induction generator (DFIG) is becoming a popular concept and thus the modeling of the DFIG based wind turbine and improvement in the transient fault conditions is an important consideration. In this paper, Transient stability improvement has been done by using Superfluous Fault Current Limiter [SFCL]. A new design of SFCL IGBT- Bridge-type SFCL shunted with a variable resistor Rsh has been proposed. Rsh is modeled to decrease the terminal voltage deviation to minimum level by reducing the amount of current at the bus terminal. Comparison of Voltage deviation and current deviation with the resistive type SFCL and IGBT- bridge-type SFCL show considerable decrease in both quantities by using IGBT- bridge-type SFCL. The values of voltage deviation at the bus terminal is 8.223 e-8 % for proposed SFCL which is less than the resistive type SFCL that is, 14.4 e-8 %. The huge voltage sag has been considerably reduced by reduction of high level of current to 0.0004401 % in IGBT-bridge-Type SFCL from 0.0004624% in resistive type SFCL. Thus proposed SFCL has caused significant improvement in transient stability keeping the deviation in active and reactive power during faults to minimum level.

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