Nonlinear control design for voltage source converters in weak AC grids

Javad Khazaei, Zhenghong Tu, Arash Asrari, Wenxin Liu

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

Abstract

Massive integration of converter-based renewable energy sources into power systems through weak AC grid has become a dilemma in recent years. This paper investigates the design of a robust nonlinear multi-input-multi-output (MIMO) controller for voltage source converters (VSCs) connected to weak AC grids. Feedback linearization method is used to find the controller equations and design the inputs to regulate the active power and output voltage of the converter. With this approach, the controller is designed in a way that the grid impedance impact on the stability of the converter system is significantly reduced. The robustness of the proposed controller is evaluated using time-domain simulations of a grid-connected VSC enhanced with the nonlinear controller in various case studies. The results illustrate a significant improvement compared to existing approaches.

Original languageEnglish (US)
Title of host publication2020 IEEE Texas Power and Energy Conference, TPEC 2020
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728144368
DOIs
StatePublished - Feb 2020
Event2020 IEEE Texas Power and Energy Conference, TPEC 2020 - College Station, United States
Duration: Feb 6 2020Feb 7 2020

Publication series

Name2020 IEEE Texas Power and Energy Conference, TPEC 2020

Conference

Conference2020 IEEE Texas Power and Energy Conference, TPEC 2020
CountryUnited States
CityCollege Station
Period2/6/202/7/20

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering
  • Safety, Risk, Reliability and Quality

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