Quasi-dynamic model of VSC-HVDC transmission systems for an operator training simulator application

Abstract

This paper proposes a simplified quasi-dynamic model of two terminal voltage-source-converter (VSC)-HVDC transmission systems based on the existing full-order models for application in an operator training simulator (OTS). The simplified model is verified against the full-order model for some verification scenarios. The model stability and behaviour is assessed to check if the model meets the grid code requirements as stated in the ENTSO-E Network Code. These features include black-start capability, set point change, active power reversion, frequency contributions and reactive power-voltage regulations. The proposed linearized model is presented in state-space equations and is stabilized by state space feedback using the linear quadratic regulator (LQR) design. The model has sufficient accuracy, requires less input data compared to full-order model, is tuneable by any vendors and is easily implementable in an environment such as OTS.