Uncertainty and disturbance estimator based controller equipped with a multiple-Time-delayed filter to improve the voltage quality of inverters

Shlomo Y. Gadelovits, Dauren Insepov, Visakan Kadirkamanathan, Qing Chang Zhong, Alon Kuperman

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

In this paper, a two-degrees-of-freedom control algorithm based on uncertainty and disturbance estimator (UDE), aimed to minimize the total harmonic distortion of inverter output voltage is proposed, possessing enhanced robustness to fundamental frequency variations. A multiple-Time-delay action is combined with a commonly utilized low-pass UDE filter to increase the range of output impedance magnitude minimization around odd multiples of fundamental frequency for enhanced rejection of typical single-phase nonlinear loads harmonics. Marginal robustness improvement achieved by increasing the number of time delays is quantified analytically and revealed to be independent of delay order. The performance of the proposed control approach and its superiority over two recently proposed methods is validated successfully by experimental results.

Original languageEnglish
Article number8663603
Pages (from-to)8947-8957
Number of pages11
JournalIEEE Transactions on Industrial Electronics
Volume66
Issue number11
DOIs
StatePublished - 1 Nov 2019

Keywords

  • Inverter
  • time-delayed filter (TD)
  • two-degrees-of-freedom control
  • uncertainty and disturbance estimator (UDE)
  • voltage quality

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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