Abstract
Capacitive current feedback active damping is widely used in the LCL-type grid-connected inverter, which can effectively suppress the resonance peak of the system. However, the control delay in digital control system can change the characteristic of capacitive current feedback active damping and make the positive and negative boundary frequency of equivalent resistance is f s /6, which affects the stability of the grid-connected inverter and the robustness to grid impedance. At the same time, the control delay would introduce phase lag and limit the bandwidth of the control loop. Therefore, a delay compensation method considering both active damping characteristics and loop bandwidth is proposed, which can expand the boundary frequency to 0.43f s and greatly improve the robustness and dynamic performance of the system. Moreover, the sampling method is synchronous sampling, which strong switching-noise immunity. Simulation results verify the validity of the proposed method.
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.
