Postdoctoral Researcher Dr. Morcos Metry, and Ph.D. Candidate Ms. Minjeong Kim presented their research on a closed-loop controller for the ripple port module integrated inverter at the twenty-first IEEE Workshop on Control and Modeling for Power Electronics on November 10, 2020. The workshop, which was held virtually, was originally scheduled to be in-person in Aalborg, DENMARK.

This paper presents a closed-loop controller using Model Predictive Control (MPC) for the ripple port module integrated inverter (RP-MII). The invention, development, and improvement of the ripple port inverters have been led by multiple REAPER lab members to mitigate the reliability issues associated with using bulky electrolytic capacitors at the dc link to filter out double frequency ripple. One challenge with the ripple port inverter has been its closed-loop control requiring multiple complex control loops with various objectives. This work presents a framework using MPC’s multi-objective feature to regulate the RP-MII using a single control loop. This work shows a reduction in dc-link capacitor sizes required from 800 uF to 16 uf, improving the RP-MII’s overall reliability as more reliable film capacitors could be employed.

This publication is based on research supported by the US Army Research Laboratory through the National Science Foundation Industry/University Cooperative Research Center for Next Generation Photovoltaics (IIP-1624539). This publication was also made possible in part by PDRA grant # 5-0422-19004 from the Qatar National Research Fund (a member of the Qatar Foundation). The statements made herein are solely the responsibility of the authors.