The dc solar cables used in photovoltaic power stations in most cases are used for outdoor long-term work. Due to the limitation of construction conditions, connectors are mostly used for cable connections. Cable conductor materials can be divided into copper core and aluminum core. The copper core cable has good oxidation resistance and stability and has a long service life. The photovoltaic cable has low voltage drop and low power loss and has good flexibility, and the allowable bend radius is small, so the construction process is easy. In addition, the copper core is resistant to fatigue and repeated bending and is not easy to break, so it is convenient to connect. At the same time, the photovoltaic cable copper core has high mechanical strength and can withstand greater mechanical tension, which brings great convenience to construction and laying, and also creates conditions for mechanized construction. . The direct buried installation of photovoltaic power plants has outstanding advantages, which can reduce the accident rate, improve the reliability of power supply, and facilitate the subsequent construction, operation, and maintenance.

During the installation and operation and maintenance of photovoltaic power stations, if the cables are routed in the soil below the ground, in weeds and rocks, on the sharp edges of the roof structure, or exposed in the air, the cables may bear the impact of external forces. If the cable sheath is not strong enough, the insulation layer will be destroyed, which will lead to short-circuit, fire, and personal injury hazards. Cable scientific research and technical personnel have discovered that cross-linked laying polyethylene can change the chemical structure of the cable insulation material, greatly improving the thermal, mechanical, and chemical properties of the cable.