Overhead Cables Are Cheap and Safe, and the Global Market is Large
Overhead line conductors are commonly used on UHV transmission lines. The erection height is high, which ensures sufficient safety distance. However, overhead cables are generally used to ensure safety for high-voltage lines that pass through cities and have low heights.
Overhead cable, fully called overhead insulated cable, is an overhead conductor equipped with an insulating layer and a protective sheath. It is a special cable that is manufactured by a production process similar to cross-linked cables. It is a new power transmission method between overhead conductors and underground cables. Overhead cables are generally single-core cables. According to the difference of core material and structure, they can be divided into hard aluminum wire overhead cables, hard-drawn copper wire overhead cables, aluminum alloy wire overhead cables, metal alloy core support structure overhead cables, and self-supporting overhead cables etc.
Overhead lines or underground transmission lines are commonly used on traditional high-voltage transmission lines. Overhead lines have the advantages of fast construction speed, low cost and easy maintenance. However, the bare conductors used without insulating layers in overhead lines are prone to personal electric shock casualties. Underground transmission lines have the disadvantages of long construction period, high cost and great difficulty in maintenance. However, cables with insulating layers used in underground transmission lines are safe and not easily affected by weather conditions. Compared with these two high-voltage transmission lines, overhead cables have the advantages of overhead lines, and use insulated cables to transmit electrical energy, which is safer.
The price of the overhead cable is between the price of the overhead line conductor and the underground transmission line cable. Due to the insulating layer, the overhead cable has the advantage of good insulation, high safety, and low short-circuit failure rate. It does not need an "electrical corridor". Multiple circuit lines can be erected on the same pole, along the walls and on tree trunks. In densely populated areas, as well as in the field of urban old power grid transformation, overhead cables have become the primary choice. Overhead line conductors are generally used on UHV transmission lines, which are erected at a high height to ensure sufficient safety distance. However, to ensure safety, overhead cables are generally used for high-voltage lines that pass through cities and have low heights.
According to the "2022-2026 In-depth Market Research and Investment Strategy Suggestions Report on Overhead Cables Industry" released by Xinsijie Industry Research Center, the global market size of overhead cables was about 67.5 billion US dollars in 2021. It is expected that the global market of overhead cables will continue to grow at a compound annual growth rate of about 5.4% from 2022 to 2026. The global demand for overhead cables continues to rise, mainly benefiting from the accelerated urbanization process in many countries, the increasing demand for electricity, the continuous expansion of new energy power generation scale, and the acceleration of smart grid construction. There are many emerging economies in the Asia Pacific region, which is the main driving force for the growth of global demand for overhead cables.
There are many overhead cable manufacturers in China, and the market competition is fierce. As the scale of power grid construction continues to expand, to ensure the quality of power grid operation and reduce maintenance costs, the demand for overhead cables is gradually moving close to the leading companies, and the market concentration is expected to continue to increase in the future.
Source: https://new.qq.com/omn/20220517/20220517A09T5900.html
