Improved interface models for hybrid simulation on large AC/HVDC power system

Recently, the electromagnetic and electromechanical hybrid simulation is gradually practiced to engineering in analysis of large AC/HVDC power systems. Interface models are one of the most important interface techniques determining accuracy and applicability. Nevertheless, the limitations of traditional interface models emerge and become concrete. This paper develops interface computational equivalent power source models of EMT subsystem and interface fundamental equivalent current related ideal voltage source model of TS subsystem. Also, case studies are carried out to quantitatively present the improvements and visually prove the necessity and efficiency.