Robust power flow control of grid-tied inverters based on the uncertainty and disturbance estimator

Yeqin Wang, Beibei Ren, Qing Chang Zhong

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations


In this paper, an uncertainty and disturbance estimator (UDE)-based control is proposed to achieve accurate power flow control for grid-tied inverters (GTI). The power delivering dynamics is introduced at first after considering both frequency dynamics and voltage dynamics. Then the UDE algorithm is adopted to regulate both output voltage amplitude and frequency for accurate real power and reactive power control. With the adoption of the UDE method, the model uncertainty (e.g., power angle) and external disturbance (e.g., variations of grid frequency and grid voltage) can be compensated automatically. Moreover, this UDE-based dynamic power flow control can achieve self-synchronization without an extra synchronization unit (e.g., a phase-locked-loop) when the inverter is connected to the grid. In addition, the proposed controller is easy for implementation and parameter tuning through the designs of desired tracking error dynamics and UDE filters, while having the flexibility and performance of advanced control methodologies. The asymptotic stability of the closed-loop system is analyzed. Experimental results are provided for validation.

Original languageEnglish
Title of host publication2016 American Control Conference, ACC 2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages6
ISBN (Electronic)9781467386821
StatePublished - Jul 28 2016
Event2016 American Control Conference, ACC 2016 - Boston, United States
Duration: Jul 6 2016Jul 8 2016

Publication series

NameProceedings of the American Control Conference
ISSN (Print)0743-1619


Conference2016 American Control Conference, ACC 2016
Country/TerritoryUnited States


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