Line-commutated -converter-based high-voltage direct current (LCC-HVDC) represents an important approach for transmitting large-scale integrated renewable power over long distances. However

coordination of various discrete and continuous adjustment devices

as well as the complex automatic voltage control problem bring great challenges for voltage control and var dispatch in converter stations (CSs). Besides

traditional approaches may suffer from frequent filter switching issues or conservativeness. To address these issues

this paper proposes a hierarchical robust voltage dispatching schedule consisting of a day-ahead schedulable period plan and an intraday model predictive control (MPC)-based rolling scheduling

which fully considers coordination of multifarious adjustment equipment with different response-time constants and control characteristics in CSs in multiple time dimensions. This method can implement adaptive adjustment of CS discrete/continuous regulating devices with sufficient dynamic var reserves under CS mutable operational conditions caused by renewable energy fluctuation. The day-ahead schedulable period plan ensures global allocation of discrete equipment action resources. MPC-based intraday rolling dispatch is used to overcome conservativeness of the traditional method and achieve automatic reactive power compensation

as well as voltage control of converter station. In a case study

a modified IEEE 9-bus system with wind farms is used to verify the proposed method.