Eigenvalue-based harmonic stability analysis method in inverter-fed power systems

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Abstract

This paper presents an eigenvalue-based harmonic stability analysis method for inverter-fed power systems. A full-order small-signal model for a droop-controlled Distributed Generation (DG) inverter is built first, including the time delay of digital control system, inner current and voltage control loops, and outer droop-based power control loop. Based on the inverter model, an overall small-signal model of a two-inverter-fed system is then established, and the eigenvalue-based stability analysis is subsequently performed to assess the influence of controller parameters on the harmonic resonance and instability in the power system. Eigenvalues associated with time delay of inverter and inner controller parameters is obtained, which shows the time delay has an important effect on harmonic instability of inverter-fed power systems. Simulation results are given for validating the proposed harmonic stability analysis method.
Original languageEnglish
Title of host publicationProceedings of the 41th Annual Conference of IEEE Industrial Electronics Society, IECON 2015
PublisherIEEE Press
Publication dateNov 2015
Pages3277-3282
DOIs
Publication statusPublished - Nov 2015
Event41th Annual Conference of IEEE Industrial Electronics Society, IECON 2015 - Yokohama, Japan
Duration: 9 Nov 201512 Nov 2015
Conference number: 35501XP

Conference

Conference41th Annual Conference of IEEE Industrial Electronics Society, IECON 2015
Number35501XP
Country/TerritoryJapan
CityYokohama
Period09/11/201512/11/2015

Keywords

  • Harmonic Stability
  • Eigenvalue
  • Time Delay
  • Small Signal Model
  • Inverter-Interfaced Power System

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