A simulation method for the detailed time response of power systems including multiterminal DC links

A modelling approach for the detailed dynamic simulation of multiterminal HVDC systems embedded in a conventional AC network is presented. This approach utilizes a decomposition technique to construct separately the state equations of properly defined subsystems, which are linked using automatically created algebraic equations of the state variables. Also, a novel converter model suitable for the efficient representation of multiterminal HVDC systems is used. Any control system applied to the converters or the AC machines can be easily incorporated using the proposed modelling technique. The effectiveness of the solution algorithm is demonstrated on a test system including a three-terminal DC system.<>