Multichoice Control Strategy for VSC-HVdc

Multichoice control strategy -MCS-consists in the selection of the correct input signals that will allow the VSC-HVDC to enhance the transient stability of the system, increase the level of damping, provide voltage support at specific nodes or change the power flow in the system, as it is required by the system when disturbances occur or ordered by the operator. This paper gives a description of the MCS and presents the procedure followed in the calculation of POD signals and a comparison of those signals with the signal derived from Lyapunov theory (Control Lya-punov Function -CLF-). All the signals were used in both small and large disturbances. The formulation of the MCS is based on a synchronous connection of the VSC-HVDC.