Steady-state control strategy of multi-terminal hybrid UHVDC

A multi-terminnal hybrid UHVDC is planned by China Southern Power Grid. The UHVDC system consists of one LCC-based sending end and two VSC-based receiving ends, rated at ±800kV. In this paper, steady-state control strategy is designed to coordinate LCC and VSCs at both sides. Smooth start-up, shutdown and reduced DC voltage operation are achieved.