Comparison of DC linear and non-linear models for multi-terminal VSC HVDC networks

Abstract

The analysis and control design of multi-terminal VSC-HVDC systems requires a linearised model of these inherently non-linear systems. This paper develops such a model, from converter to multi-terminal system, discusses the key concepts and shows its use for some test cases. The linearised model is simulated in Matlab, and it is compared against the non-linear model results from an established DEM PSCAD model.

Keywords

• HVDC power transmission
• HVDC power convertors
• voltage-source convertors
• power transmission control
• linear systems
• nonlinear control systems
• control system synthesis
• multiterminal VSC HVDC networks
• control design
• multiterminal VSC-HVDC systems
• linearised model
• nonlinear systems
• DC linear model
• DC nonlinear model
• DEM PSCAD model
• Matlab