A power line structure, an array substrate including the power line structure and a display panel are provided. The power line structure (100) includes a conductive plate (110), the conductive plate (110) includes a through hole disposing area (103), the through hole disposing area (103) is provided with a plurality of via holes (101); in at least one sub-area of the through hole disposing area (103), a distribution density of the via holes (101) increases along a direction of decreasing a current density in the conductive plate (110).