Improved fault ride through capability of DFIG based wind turbines using synchronous reference frame control based...

Area of Science:

• Electrical Engineering
• Renewable Energy Systems
• Power Systems Stability

Background:

• Increasing wind energy penetration necessitates robust grid stability solutions.
• Doubly Fed Induction Generator Wind Turbines (DFIG-WT) are susceptible to grid voltage disturbances.
• Fault Ride Through (FRT) capability is crucial for wind turbine integration.

Purpose of the Study:

• To investigate the effectiveness of a Dynamic Voltage Restorer (DVR) for enhancing FRT in DFIG-WT.
• To assess DVR performance under balanced and unbalanced grid fault conditions.
• To validate the application of Synchronous Reference Frame (SRF) control for DVR in DFIG-WT systems.

Main Methods:

• Implementation of a DVR with SRF control strategy.
• Time-domain simulations using MATLAB/Simulink.
• Testing on a 1.5MW DFIG-WT model under various fault scenarios.

Main Results:

• The DVR effectively mitigated voltage sags during grid faults.
• Nominal operating conditions for the DFIG-WT were maintained.
• SRF controlled DVR demonstrated successful FRT capability for both balanced and unbalanced faults.

Conclusions:

• DVR with SRF control is a viable solution for improving FRT in DFIG-WT.
• This approach enhances grid stability with high wind energy penetration.
• Simulation results confirm the robustness of the proposed DVR strategy.