Picture of wind turbine against blue sky

Open Access research with a real impact...

The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs.

The Energy Systems Research Unit (ESRU) within Strathclyde's Department of Mechanical and Aerospace Engineering is producing Open Access research that can help society deploy and optimise renewable energy systems, such as wind turbine technology.

Explore wind turbine research in Strathprints

Explore all of Strathclyde's Open Access research content

VSC transmission model for analytical studies

Jovcic, D. and Lamont, L. and Xu, L. (2003) VSC transmission model for analytical studies. In: IEEE-Power-Engineering-Society General Meeting 2003, 2003-07-13 - 2003-07-17.

Full text not available in this repository. (Request a copy from the Strathclyde author)

Abstract

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.