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The overhead line will be the trend of underground laying future


Overhead lines are mainly overhead lines, erected on the ground. They are transmission lines that use insulators to hold transmission lines on poles that stand on the ground to transmit electric energy. Erection and maintenance are relatively convenient and cost is low, but they are easily affected by meteorology and environment (such as wind, lightning, pollution, ice, etc.). At the same time, the entire transmission corridor occupies a large area of land, causing electromagnetic interference to the surrounding environment. . The most common are: AAAC ACSR AAC Aerial-bundled cable

However, the pace of urban construction is getting faster and faster, and grid construction is also steadily progressing. It can be said that “where the city is built, where the utility poles are placed.” However, more and more wires in the air are completely unable to meet the vision. Demand, for this reason, cables are being introduced into the ground at a speed of 100 kilometers per year. The purpose is to reduce airborne lines and ensure that the city is more clean.

With the cable entry project, the streets will be more beautiful, and the space above will be purified. With the development of the city, the overhead line will be the future development trend.

The entry of cables into the ground provides a powerful guarantee for the construction of New Town. Compared with overhead transmission lines, the technical difficulty, project cost and maintenance cost of underground cable transmission lines will be doubled. The engineering standards for cables entering the ground are not the same. One is the form of the tunnel. The cost of such cable entry is very high, which is comparable to the cost of subway construction. However, the reliability of the power supply is relatively high and the maintenance of the cable is more convenient. The other is the platoon pipe, which is to insert the cable into the pipe and bury it underground to protect the cable. The most direct way is to bury it directly and bury the cable directly in the ground. The standard construction cost is the lowest, but even The cost of this cable into the ground is also higher than the overhead line.

Although there are still many difficulties in the construction of cables, such as construction cost, daily maintenance, and construction, it is impossible to deny the appearance of the cable entry project to the city, integrate the land resources, and re-plan and reconstruct the power grid construction. The economic benefits reflected by the angle.