Abstract
This paper presents a linearized small signal model of a grid-tied inverter with an LCL filter using two alternative grid synchronisation strategies. The first strategy synchronises using direct measurements of the LCL filter capacitor voltage, while the second approach self-synchronises the inverter to the internal resonant dynamic states of the inner-loop current regulator. A small signal modelling approach is used to aggregate the non-linear state space equations for each inverter control system in a synchronous reference frame. This enables Jacobian linearization to be used to quantify the eigenvalues of the inverter control system. The linearized small signal model is validated against simulation and experimental results, and show that self-synchronisation has a superior stability performance compared to direct measurement.
Sign-in/Register to access full text options 
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.
