Abstract
The quality of power and current control are the greatest challenges of grid-connected wind farms during abnormal conditions. The negative- and positive-sequence components of the grid currents may be injected into a wind generation system during grid faults, which can affect the power stability and damage the wind system. The proposed work assures a low-voltage ride through capability of doubly-fed induction generator- based wind turbines under the grid voltage sag. A new technique to protect the wind system and to recompense the reactive power during failures of the utility grid according to the Spanish grid code is proposed. The control design is implemented to the power converters, and the grid current regulation is developed by using proportional-resonant regulators in a stationary two-phase (αβ) reference frame. The control performance is significantly validated by applying the real-time simulation for the rotor-side converter and the hardware in the loop simulation technique for the experiment of the generator’s grid-side converter control.
Highlights
Nowadays, the recent energy production faces an increasing awareness concerning the conventional power generation impact on the environment since it is infected by CO2 emission [1].Such a problematic requires new alternative technologies to create energy in environment-friendly ways and, considering the increasing demand for global energy, society has a greater environmental responsibility to develop green technologies
The whole wind turbine system adopted on a doubly-fed induction generator (DFIG) comprises different components [3], which effectively contribute in the power conversion from the wind kinetic energy to the electrical power transferred to a utility grid [4,5]
The work novelty can be observed in the proposed low-voltage ride through (LVRT) algorithm presented in Section 3 according to the IEC 61400-21 [41] and the Spanish grid code, generating the positive- and negative-sequence components (P–N SCs) of the grid currents with the implementation of the PR regulators on the DFIG’s grid-side converter (GSC) in the αβ components of the
Summary
The recent energy production faces an increasing awareness concerning the conventional power generation impact on the environment since it is infected by CO2 emission [1]. A rotor-side converter (RSC) was examined in this paper and two current regulators were implemented for the P–N SCs. because of the RSC limited control, it is difficult to obtain a simultaneous rejection of power oscillations and an improved control method was used to deal with unbalanced grid voltages. The work novelty can be observed in the proposed LVRT algorithm presented in Section 3 according to the IEC 61400-21 [41] and the Spanish grid code, generating the P–N SCs of the grid currents with the implementation of the PR regulators on the DFIG’s GSC in the αβ components of the.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
