High-voltage transmission lines become necessary when connecting large-scale solar farms to the grid over considerable distances. These typically employ aluminum conductor steel-reinforced (ACSR) cables, which combine mechanical strength with excellent conductivity. PV grid connection planning is an elementary component of system engineering. With many years of experience and practical, technical expertise, we select the correct grid connection components based on your designed photovoltaic system and the grid operator's specifications, including route cables. Power transmission systems for photovoltaic (PV) installations represent a critical bridge between solar energy generation and practical electricity distribution. A grid-tied solar system has a special inverter that can receive power from the grid or send grid-quality AC power to the utility grid when there is an excess of energy from the solar. The electrode grid lines are a critical component of solar cells, where power loss caused by grid shading and associated resistance significantly impacts cell performance. We establish a power loss model for busbar-less solar cells to optimize the parameters and layout of grid lines, and analyze. When faults occur in transmission lines of grid-forming PV systems, the LVRT control and virtual impedance function cause the fault characteristics of grid-forming inverters to differ significantly from those of synchronous generators, which deteriorates the performance of existing protection. Solar photovoltaic integration into power systems is rapidly emerging as a transformative solution for the global energy transition to support the vision of net zero and mission of decarbonization.