I. Introduction
The utilization of large-capacity and high-voltage offshore wind generators (e.g. 66kV, 10MW) as well as MMC-HVDC has become a trend in offshore wind farms [1] [2]. As offshore wind farm capacities grow and the transmission distances expand, maintaining the stability and security of the transmission system is becoming a more formidable challenge [3] [4]. The extensive layouts of the large-scale wind farms generate an increased amount of reactive power, leading to heightened volatility in the voltage of the collection line [5]. This intricacy necessitates carefully devised strategies for managing these impacts.