Robust control for parallel operated L-Inverters with uncertainty and disturbance estimator

Yeqin Wang, Qing Chang Zhong, Beibei Ren

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In conventional droop control, accurate proportional load sharing could not be achieved among parallel operated inverters due to the mismatch of output impedance and system disturbances. In this paper, an uncertainty and disturbance estimator (UDE)-based robust droop control strategy is proposed for accurate proportional load sharing, particularly reactive power sharing, among parallel operated L-inverters. The reactive power dynamics is derived from power delivery equation passed by a low-pass filter, while the reactive power reference is designed with the feedback of load voltage. The reactive power control is developed based on UDE-based method. The model nonlinearity and uncertainty (e.g., power angle), and system operation disturbances (e.g., change of output impedance, and load change), can be estimated and compensated by this UDE-based robust droop control. Experimental validation is provided to show the effectiveness of the proposed method.

Original languageEnglish
Title of host publicationECCE 2016 - IEEE Energy Conversion Congress and Exposition, Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781509007370
DOIs
StatePublished - 2016
Event2016 IEEE Energy Conversion Congress and Exposition, ECCE 2016 - Milwaukee, United States
Duration: Sep 18 2016Sep 22 2016

Publication series

NameECCE 2016 - IEEE Energy Conversion Congress and Exposition, Proceedings

Conference

Conference2016 IEEE Energy Conversion Congress and Exposition, ECCE 2016
CountryUnited States
CityMilwaukee
Period09/18/1609/22/16

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    Wang, Y., Zhong, Q. C., & Ren, B. (2016). Robust control for parallel operated L-Inverters with uncertainty and disturbance estimator. In ECCE 2016 - IEEE Energy Conversion Congress and Exposition, Proceedings [7855404] (ECCE 2016 - IEEE Energy Conversion Congress and Exposition, Proceedings). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ECCE.2016.7855404