In 2021, wind power and photovoltaic power generation will account for about 11% of the total electricity consumption of the whole society. With the increase of photovoltaic power generation by national policies, the proportion of wind power and photovoltaic power generation will be further accelerated. The demand for related supporting industries will also surge.
In photovoltaic projects, projects using copper cables are larger than aluminum alloy cables. The electrical properties (conductivity, electrical insulation, and transmission properties) of copper cables are better than those of traditional aluminum alloy cables. After (when the cross-sectional area of the aluminum alloy cable is increased to 150% of the cross-sectional area of the copper conductor), not only the electrical properties are consistent with the copper conductor, but also the tensile strength has certain advantages over the copper conductor, and the weight is light and the cost is low.
Next, we will compare the physical properties of copper cables and aluminum alloy cables in many aspects. With the support and subsidies of ZF for new energy, it is believed that the proportion of aluminum alloy cables in photovoltaic projects will become larger and larger in the future.
The difference between aluminum core cable and copper core cable, advantages and disadvantages comparison
- Soft performance
[Advantages of photovoltaic aluminum alloy cables, the difference between aluminum core cables and copper core cables, and comparison of advantages and disadvantages] Copper core cables have excellent softness, but alloy aluminum core cables are 25% higher than copper cables.
- Bending radius
The bending radius of the copper core cable is 15D, which is equivalent to 15 times the diameter of the cable. For example, the bending radius of a cable with a diameter of 2 cm is about 30 cm. The bending radius of the aluminum alloy cable is only 7D.
The conductivity of copper core cable is 103.1%IACS, while the conductivity of aluminum alloy cable is 62%IACS. The smaller the resistance, the better, which is conducive to transmission and reduces the risk of heat generation, burning and short circuit.
- Voltage drop
The voltage drop of the copper core cable is relatively low, and the voltage drop of the aluminum alloy cable is relatively high. In the actual project China, the voltage drop can ensure the quality of the transmission voltage.
- Capacity per unit volume
The ampacity per unit volume represents the amount of current passed when transmitting electrical energy. The ampacity per unit volume of the copper core cable is 100%, which is better. The aluminum alloy cable can be solved by process technology (but when the cross section of the alloy cable is increased by 1.5 times, it is equivalent to the current carrying capacity of the copper cable)
On the premise of ensuring the quality of the power station, the application of suitable new materials and new technologies is a major trend. Therefore, the use of new materials not only requires manufacturers to provide products with reliable quality, but also requires installation and maintenance in strict accordance with the requirements to ensure the power generation of photovoltaic projects throughout the life cycle.