The necessity of solar photovoltaic cable instead of traditional cable

In recent years, in the relevant national policy support, guidance, rapid development of photovoltaic industry, photovoltaic power plant capacity increasing year by year. But because of the domestic photovoltaic cable r&d and marketing work relative lag, the photovoltaic power station construction and the operation process

in recent years, under the national relevant policy support and guide, solar photovoltaic industry development is rapid, photovoltaic power plant capacity increasing year by year. However, the domestic photovoltaic cable r&d and marketing relative lag. In the process of construction and operation of photovoltaic power station, the traditional cable is used in connected photovoltaic power station equipment. Because does not take into account in the process of design and manufacture of photovoltaic power station installation and use of the complex and changeful environment, the traditional cable cannot meet the use requirement, the quality problem of the photovoltaic power station. Performance, especially the traditional cable itself can not meet the requirement of the power station using the environment caused by the quality problem is especially striking. However, special photovoltaic cable is according to the complex application environment and photovoltaic power station design, can satisfy the requirement of the photovoltaic power station installation and operation. The use of special photovoltaic cable photovoltaic power station, especially in the DC side, can effectively reduce the occurrence of quality problems. Photovoltaic power station has been built in China, this requires a cable with large temperature tolerance range. In the north and west parts of China, for example, cable need under relatively low temperature, in some areas, minus 40 ℃, extreme low temperature may reach even lower. However, in the eastern part of our country and the south, the surface temperature is easy to reach more than + 70 ℃. Considering the working temperature of conductor is higher than the ambient temperature and produce heat to evaporate, considering the roof ventilation, cooling effect is not good bridge area of the extreme temperature could be more than + 90 ℃, which requires the material of the cable temperature can meet the requirements of power station work under extreme temperature. The frequent changes of temperature and humidity of insulation and sheath material aging has a direct effect, especially in the daily temperature difference and temperature difference in larger regions and humid rainy regions. Fish light complementary projects in our country, many power plants built in fish ponds or directly on the surface, required cable in damp environment for a long time to work normally. Traditional cable does not take into account the performance of hot and humid changes affect the performance of material aging, and the design of the photovoltaic dedicated cable considering the hot and humid environment affect the performance of insulation and sheath material aging factors. Therefore, qualified photovoltaic cable can satisfy the requirements of the photovoltaic power station on the temperature and humidity changes. Photovoltaic power station sunshine time is long, exposure to the sun's intensity is relatively high. Sunlight contains a variety of rays, especially ultraviolet ray, will accelerate the ageing of the cable insulation and sheath. Many of the photovoltaic power station cable are bare. In most cases, from solar modules to total box, even to the inverter cable is directly exposed. This requires a cable must be able to withstand the sunlight and ultraviolet radiation, and vertical in the sunlight and ultraviolet radiation for a long time to work normally. Qualified pv cable, therefore, under the condition of the sunlight and ultraviolet radiation can normal to work long hours, and the traditional cable insulation and sheath under the condition of the sunlight and ultraviolet radiation can accelerate ageing, resulting in insulation performance degradation or failure, sheath protection to reduce the effect of problems.