Disturbance Rejection Ability Enhancement Using Repetitive Observer in Phase-locked Loop for More Electric Aircraft

Tang, Mi; Bifaretti, Stefano; Pipolo, Sabino; Formentini, Andrea; Odhano, Shafiq; Zanchetta, Pericle

Abstract

Under the concept of transportation electrification, more electric aircraft (MEA) involves more electrical energy to reduce emissions. Phase-looked loops (PLLs) have been well developed for synchronizing different power sources in a grid. Since MEA operates at variable frequency from 360 Hz to 800 Hz, a third-order model based steady-state linear Kalman filter PLL (SSLKF-PLL) has been proposed in literature to achieve fast tracking performance during such grid frequency variations. To suppress the potential disturbances due to harmonics in the grid, sensor scaling errors/unbalances and d.c offsets while maintaining low computational burden, this paper aims to enhance the disturbance rejection ability of SSLKF-PLL by adding a repetitive observer (RO). Simulation tests show that RO allows stable and effective suppression of disturbances from all above-mentioned sources during variable frequency operation.

• Conference Name: 2020 IEEE Energy Conversion Congress and Exposition (ECCE)
• Conference Location: Online
• Start Date: Oct 11, 2020
• End Date: Oct 15, 2020
• Acceptance Date: Jul 1, 2020
• Online Publication Date: Oct 30, 2020
• Publication Date: Oct 11, 2020
• Deposit Date: Mar 23, 2021
• Publicly Available Date: Mar 23, 2021
• Publisher: Institute of Electrical and Electronics Engineers
• Pages: 6379-6384
• Book Title: 2020 IEEE Energy Conversion Congress and Exposition (ECCE)
• ISBN: 9781728158266
• DOI: https://doi.org/10.1109/ecce44975.2020.9235893
• Public URL: https://nottingham-repository.worktribe.com/output/5412412
• Publisher URL: https://ieeexplore.ieee.org/document/9235893
• Additional Information: © 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes,creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.