VSC transmission model for analytical studies

D. Jovcic, L. Lamont, L. Xu

Research output: Contribution to conferencePaper

89 Citations (Scopus)


This paper presents a model of Voltage Source Converter (VSC) based transmission that can be used for wide range of stability studies and controller design with MATLAB software. The model is intended for analytical studies in the frequency domain above 5Hz. The system model has modular structure and includes three separate units in state-space form: AC rectifier model, AC inverter and DC system model. The converters, controllers and Phase Locked Loop (PLL) units are included in the DC model and the model is linked with other units using input-output matrices in the state-space models. The converter non-linear model is linearised assuming small deviations around the steady-state. The model is tested against the PSCAD/EMTDC non-linear model and the results show satisfactory accuracy. The tests also confirm that the analytical model well represents multivariable system properties. An example of the model use is given showing the eigenavlue study of the influence of PLL gains on the system stability. It is concluded that increased PLL gains deteriorate system stability.
Original languageEnglish
Number of pages6
Publication statusPublished - Jul 2003
Event IEEE-Power-Engineering-Society General Meeting 2003 - Toronto, Canada
Duration: 13 Jul 200317 Jul 2003


Conference IEEE-Power-Engineering-Society General Meeting 2003


  • VSC transmission
  • model
  • analytical studies
  • analytical models
  • voltage control
  • stability
  • software design
  • power conversion
  • phase locked loops
  • mathematical model
  • frequency domain analysis
  • converters


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