An adaptive grid-voltage sensorless interfacing scheme for inverter-based distributed generation

Yasser Abdel Rady Ibrahim, Ehab F. El-Saadany

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

1 Scopus citations

Abstract

This paper presents an adaptive grid-voltage sensorless interfacing scheme for inverter-based distributed generation (DG) units based on an adaptive grid-interfacing model. First, a discrete-time model of a current controlled gridconnected inverter is presented. Second, an adaptive gridinterfacing model is designed with low computational demand to estimate, in real-time, the interfacing (impedance) parameters seen by the inverter and the grid voltage vector simultaneously. A reliable solution to the present nonlinear estimation problem is presented by combining a grid-voltage estimator with an interfacing parameter estimator in a parallel structure. Third, the estimated quantities are utilized within the inner high bandwidth current control loop and the outer power controller to realize an adaptive grid-voltage sensorless interfacing scheme. Theoretical analysis and evaluation results are provided to demonstrate the validity and usefulness of the proposed interfacing scheme.

Original languageBritish English
Title of host publicationIEEE Power and Energy Society 2008 General Meeting
Subtitle of host publicationConversion and Delivery of Electrical Energy in the 21st Century, PES
DOIs
StatePublished - 2008
EventIEEE Power and Energy Society 2008 General Meeting: Conversion and Delivery of Electrical Energy in the 21st Century, PES - Pittsburgh, PA, United States
Duration: 20 Jul 200824 Jul 2008

Publication series

NameIEEE Power and Energy Society 2008 General Meeting: Conversion and Delivery of Electrical Energy in the 21st Century, PES

Conference

ConferenceIEEE Power and Energy Society 2008 General Meeting: Conversion and Delivery of Electrical Energy in the 21st Century, PES
Country/TerritoryUnited States
CityPittsburgh, PA
Period20/07/0824/07/08

Keywords

  • Adaptive identification
  • Digital current control
  • Distributed generation
  • Grid-voltage sensorless control
  • Pulse-width modulated (PWM) inverters

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