An adaptive controller for inverter-interfaced DGs connected to grids with a wide range of unknown impedances

Xiaolin Mao, Raja Ayyanar

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

8 Scopus citations

Abstract

Significantly degraded dynamic performance, or even instability, can occur when connecting a distributed generator interfaced through an inverter to a grid whose impedance is significantly different than the one that the inverter is designed for. Previous solutions in the literature require measurement of the grid impedance and re-engineering of the inverter controller. In this paper, a novel, adaptive current control is proposed. It employs an embedded Model Reference Adaptive Control that turns the plant model with uncertainties into a known, desired model. Consequently, the controller can self-adapt to a wide range of grid impedances without problems of instability and degradation of dynamic performance. This allows mass manufactured inverters of a single design to be connected to grids of different stiffness. The design of the proposed controller and simulation verification results are presented.

Original languageEnglish (US)
Title of host publication2010 IEEE Energy Conversion Congress and Exposition, ECCE 2010 - Proceedings
Pages2871-2877
Number of pages7
DOIs
StatePublished - Dec 20 2010
Event2010 2nd IEEE Energy Conversion Congress and Exposition, ECCE 2010 - Atlanta, GA, United States
Duration: Sep 12 2010Sep 16 2010

Publication series

Name2010 IEEE Energy Conversion Congress and Exposition, ECCE 2010 - Proceedings

Other

Other2010 2nd IEEE Energy Conversion Congress and Exposition, ECCE 2010
CountryUnited States
CityAtlanta, GA
Period9/12/109/16/10

Keywords

  • Adaptive control
  • Instability
  • Model reference adaptive control
  • PV inverter
  • Weak grid

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment

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