In recent years, under the support and guidance of relevant national policies, the solar photovoltaic power generation industry has developed rapidly, and the installed capacity of photovoltaic power plants has increased year by year. However, due to the relatively lag in the research and development of domestic photovoltaic cables and their market promotion, in the process of photovoltaic power station construction and operation, photovoltaic power station equipment connection cables still use conventional cables. Due to the fact that conventional cables do not consider the complex and changeable factors such as the use and laying environment of photovoltaic power plants in the design and manufacturing process, they cannot meet the use requirements, resulting in frequent quality problems of photovoltaic power plants. In particular, the quality problem caused by the fact that the performance of the conventional cable itself cannot meet the requirements of the power station operating environment is particularly obvious. The special photovoltaic cable is designed according to the complex and changeable photovoltaic power station operating environment, which can meet the laying and operation requirements of the photovoltaic power station. The use of special photovoltaic cables in photovoltaic power plants, especially the DC side, can effectively reduce the occurrence of quality problems.

Photovoltaic power stations are built all over our country, which requires a wide range of temperature resistance grades of cables. For example, in the western and northern regions of our country, cables are required to withstand lower temperatures, and extreme low temperatures in individual areas can reach -40°C below zero. , even lower temperatures. In the eastern and southern regions of my country, the surface temperature can easily reach above +70°C. Considering that the working temperature of the conductor is higher than the ambient temperature and generates heat volatilization, it is very likely that the extreme temperature in the area where the roof is not ventilated and the heat dissipation effect of the bridge is not good Above +90°C, which requires the material temperature of the cable to meet the requirements of the power station working in extreme temperatures.

Frequent changes in temperature and humidity have a direct impact on the insulation and aging of the material, especially in areas with large daily temperature differences and annual temperature differences and in humid and rainy areas, which have a greater impact on the insulation and aging properties of the material. In my country's fish-light complementary projects, many power stations are directly built on fish ponds or on the water surface, requiring cables to work normally in a humid environment for a long time. The performance of conventional cables does not consider the influence of moisture and heat changes on the aging performance of materials, while the design of photovoltaic special cables takes into account the factors that affect the aging performance of insulation and sheathing materials in the design of photovoltaic special cables. Therefore, qualified photovoltaic cables can meet the requirements of photovoltaic power plants. Requirements for temperature and humidity changes.

Photovoltaic power plants have a long sunshine time, and their intensity of exposure to sunlight is greater, and sunlight contains a variety of rays, especially ultraviolet rays, which can accelerate the aging of cable insulation and sheathing. Most of the cables of photovoltaic power plants are laid bare. In most cases, the cables from solar modules to combiner boxes and even to inverters are directly laid bare. This requires that the cables must be able to withstand sunlight and ultraviolet radiation. It works normally for a long time under the vertical radiation of ultraviolet rays. Therefore, qualified photovoltaic cables can work normally for a long time under the conditions of sunlight and ultraviolet radiation, while the insulation and sheath of conventional cables will accelerate aging under the conditions of sunlight and ultraviolet radiation, resulting in reduced insulation performance or failure, sheath The problem of reduced protection.

Some photovoltaic power plants are built in special areas such as seaside and tidal flats. These areas have high levels of salt spray in the air. Some photovoltaic plants are located in former salt pans, where the soil is high in salinity. Cables used under the above environmental conditions must have strong resistance to salt spray and acid and alkali. Therefore, qualified photovoltaic cables have strong resistance to salt spray and acid and alkali. The ozone content in some areas where photovoltaic power plants are located is relatively high, and ozone has a certain corrosive effect on the cable sheath, that is, it accelerates the aging of the sheath and affects the use of the cable. Conventional cables do not consider the effect of ozone on the cable sheath, while photovoltaic cables are designed with this effect in mind. Therefore, even in areas with high ozone content, photovoltaic cables can work normally for a long time.

The above characteristics of photovoltaic cables can be applied to photovoltaic power plants under different environmental conditions to ensure long-term safe operation, while conventional cables are difficult to achieve. Therefore, in photovoltaic power station construction projects, especially some photovoltaic power station construction projects with special environments, choosing photovoltaic cables instead of conventional cables can effectively ensure long-term and stable operation of the power station, thereby ensuring good long-term operating benefits of the power station.