Impact of Increasing the Number of Type-3 Wind Turbines on Stability of Power-system Dynamics

Sanjana Vijayshankar, Victor Purba, Peter J Seiler Jr, Sairaj V. Dhople

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

Abstract

This paper outlines an approach to perform small-signal stability analysis of a power network with conventional synchronous generators and a wind farm composed of Type-3 wind turbines as the number of turbines in the farm is varied. An enabling ingredient to perform this analysis is a dynamic reduced-order aggregate model for a wind farm that preserves the model order and structure of individual wind turbines. This facilitates stability analysis since the number of wind turbines can be varied with ease and small-signal stability of the mixed machine and inverter-interfaced turbines can be examined systematically. Although there is a vast body of literature on small-signal stability of wind farms, penetration level of wind farms is significantly less studied in this context; this paper introduces a systematic approach for such an analysis. Case studies for a modified Kundur two-area system with an integrated wind farm indicate that as the number of wind turbines is increased to a point that the penetration level is approximately 25%, there is a loss of small-signal stability. We validate this with time-domain simulations for the nonlinear system dynamics and also propose a redesign strategy grounded in a system-theoretic analysis of the dynamical models.

Original languageEnglish (US)
Title of host publication2019 IEEE Power and Energy Society General Meeting, PESGM 2019
PublisherIEEE Computer Society
ISBN (Electronic)9781728119816
DOIs
StatePublished - Aug 2019
Event2019 IEEE Power and Energy Society General Meeting, PESGM 2019 - Atlanta, United States
Duration: Aug 4 2019Aug 8 2019

Publication series

NameIEEE Power and Energy Society General Meeting
Volume2019-August
ISSN (Print)1944-9925
ISSN (Electronic)1944-9933

Conference

Conference2019 IEEE Power and Energy Society General Meeting, PESGM 2019
Country/TerritoryUnited States
CityAtlanta
Period8/4/198/8/19

Bibliographical note

Funding Information:
Funding support from the the U.S. Department of Energy under Contract No. DE-EE0000-1583 and the National Science Foundation under grants 1453921, 1254129 is gratefully acknowledged.

Publisher Copyright:
© 2019 IEEE.

Keywords

  • Modal analysis
  • Nonlinear systems
  • Numerical simulation
  • Power system stability
  • Wind energy

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