Automatic Generation Control of HVDC Interconnected Power Grids Considering Frequency Synchronous Control Strategy

The high voltage direct current (HVDC) lines are required to employ supplemental control strategy to achieve mutual frequency support across asynchronous grids. Based on this, the frequencies of different sub-grids are recoupled, which poses new challenge on the automatic generation control (AGC). To address this issue, this paper proposes a model predictive control based AGC control scheme for HVDC interconnected grids considering the frequency synchronous control strategy. The state-space model is developed to accurately capture the power interactive characteristics between the interconnected grids. The numerical tests show that the proposed scheme can enhance the control performance compared with traditional methods.