Electric Power Small Class│The "new favorite of the industry" to promote the high-quality development of photovoltaic power generation - DC cables for photovoltaic power generation systems

As an important part of clean energy, solar photovoltaic power generation will occupy an important seat in the world's energy consumption in the near future, not only to replace some conventional energy, but also to become the main body
of the world's energy supply.

So, in the photovoltaic system, how should the cable of the photovoltaic system be designed and selected?

This issue of the power class will talk about the DC transmission power cable for photovoltaic power generation system, which is mainly used for DC voltage terminal, lead connection of power generation equipment and convergence connection between components and photovoltaic power generation equipment system with the highest voltage DC1.
8KV
.

Strong development momentum The photovoltaic cable market is broad

Photovoltaic power generation is a project that benefits the people, and has maintained a strong momentum of development with the support of national policies and the joint efforts of all parties
.
It is expected that by 2030, renewable energy will account for more than 30% of the total energy mix, and solar photovoltaic power generation will also account for more than 10% of the world's total electricity supply; By 2040, renewable energy will account for more than 50% of total energy consumption, and solar photovoltaic power generation will account for more than 20% of total electricity; By the end of the 21st century, renewable energy will account for more than 80% of the energy mix, and solar power will account for more than
60%.
These figures are enough to show the development prospects of the solar photovoltaic industry and its important strategic position
in the energy sector.

The development of photovoltaic power generation industry has injected new vitality
into the domestic cable industry.
The reliability of the photovoltaic power generation system, especially the stable operation of its key component - cable, has greatly stimulated the market demand
for photovoltaic cables.

Professional design and selection tailored for the photovoltaic industry

At present, the current situation of the domestic photovoltaic cable industry is that the connection cable of many photovoltaic power plant equipment still adopts conventional cables, and the complex and changeable use environment and laying requirements of photovoltaic power plants are not fully considered in the design and manufacturing process
.

A large number of DC cables in photovoltaic power plants need to be laid outdoors, the environmental conditions are harsh, and the cable materials should be determined according to the resistance to ultraviolet rays, ozone, severe temperature changes and chemical erosion
.
Long-term use of ordinary materials in this environment will cause the cable sheath to be brittle and even decompose the cable insulation layer
.
These conditions will directly damage the cable system, but also increase the risk of cable short circuit, and in the medium and long term, the possibility of fire or personal injury is also higher, greatly affecting the service life
of the system.

Far East Cable learned about this situation when investigating market demand and digging deep into customer pain points, increased the research and development and production of cables for photovoltaic power generation systems, and successfully developed solar special cables - DC transmission power cables
for photovoltaic power generation systems.

This product is specially designed for photovoltaic engineering construction and installation (round separable photovoltaic cable), applicable to the standard CEEIAB218.
2-2012
.
Round separable structure, wire core identification is convenient for installation, can be equipped with MC3, MC4 special connector equipment
.
For grouping and on-site maintenance search during installation and laying, it is convenient and fast, and armored structures can be used to meet the laying conditions
such as buried and bridge.

Excellent product performance Stable operation in a variety of harsh environments

In order to meet the complex and changeable use environment and laying requirements of photovoltaic power plants and improve the service life of photovoltaic power generation systems, the DC transmission power cable for photovoltaic power generation system developed by Far East has been tested layer by layer and meets the following performance characteristics:

125°C insulation volume resistivity: not less than 1012Ω? cm

Hot air aging: 158°C, 7d insulation, sheath thermal aging change rate does not exceed -30%

Low temperature test: -40 °C low temperature impact, winding without cracking, low temperature tensile elongation is not less than 20%

Artificial climate aging: sheath reduction rate does not exceed ±30%

Damp heat test: temperature 90 °C relative humidity 85%, 1000h, insulation and sheath reduction rate not more than 30%

Low smoke and halogen-free: PH value minimum 4.
3, conductivity maximum 10μs/mm, light transmittance not less than 60%

Salt spray resistance: NaCL concentration 5%, temperature 35 °C, time 336h, sheath change rate does not exceed ±30%

Life assessment: the temperature index extrapolated to 20000h by the Arenius regression curve, not less than 125 °C

Bunch combustion: meet the carbonization height of bunching class C combustion is not higher than 2.
5m
.

As a leading enterprise in the cable industry, Far East Cable has always adhered to innovation based on market development needs, and constantly standardized and promoted the development of domestic photovoltaic cables towards better quality and higher technology
.
(Chu Mengqian)