Abstract: In recent years, wind farm collection lines designs have faced new characteristics such as dispersed turbine locations and increased capacity per turbine, resulting in excessively long transmission distances and lines voltage drops becoming limiting factors. By analyzing load distance and voltage drop concepts and formulas from design manuals and standards, and combining this with practical project experience, measures such as reducing the transmission capacity of a single collection line and increasing conductor cross-sectional area are examined to avoid adding switchyards or intermediate substations, addressing issues encountered during project development and implementation, and achieving the goal of "reducing costs and increasing efficiency." Additionally, a brief analysis and discussion are provided on the technical trends related to using a 66kV voltage level and adopting new energy-saving conductors.