Abstract
Increased penetration of wind energy systems has serious concerns on power system stability. In spite of several advantages, doubly fed induction generator (DFIG) based wind energy systems are very sensitive to grid disturbances. DFIG system with conventional vector control is not robust to disturbances as it is based on PI controllers. The objective of this paper is to design a new vector control that is robust to external disturbances. To achieve this, inner current loop of the conventional vector control is replaced with sliding mode control. In order to avoid chattering effect and achieve finite time convergence, the control gains are selected based on positive semi-definite barrier function. The proposed barrier function adaptive sliding mode (BFASMC) is evaluated by testing it on a benchmark multi-machine power system model under various operating conditions. The simulated results show that the proposed method is robust to various disturbances.
Highlights
Increased population, global warming, change in governments green policies, increased flow of funds, and decreased installation costs paved a path for Renewable energy systems
5 Results and discussion The proposed composite sliding mode control is evaluated by testing in a simulated environment MATLAB/ Simulink
In order to observe the robustness of the proposed control idea, it is tested for various test conditions for a benchmark multi-machine power system model
Summary
Global warming, change in governments green policies, increased flow of funds, and decreased installation costs paved a path for Renewable energy systems. DFIG is the most popular generator compared to others in wind energy systems. It consists of a wind turbine coupled to the shaft of the induction machine. The stator of the DFIG system is directly connected to the grid while the rotor is connected to the grid via a back to back converter which regulates the slip power. Efficient independent active and reactive power control is another advantage of the DFIG system. Because of the above advantages, DFIG dominated the entire variable speed wind energy systems. The performance of the DFIG system during grid perturbations is drastically affected [12]
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.
