The overhead line refers to the overhead open line set up on the ground, which is the electric power line set up on the pole tower with insulators and power fittings. It is made up of wire and ground wire (overhead ground wire), tower, insulator, hardware, and other components of the tower foundation, anchor and grounding device, the wire is made from good conductive metal, there is enough thick section (to maintain the proper flow density) and large radius of curvature (to minimize corona discharge) and ultra-high voltage transmission is certainly use split conductor; The insulator string is composed of a single suspension (or bar) insulator string, which should meet the requirements of insulation strength and mechanical strength, and the number of insulators in each string is determined by the transmission voltage level. Poles and towers, mostly made of steel or reinforced concrete, are the main support structures for overhead transmission lines…
We see overhead lines are usually mounted on the open wire on the ground, the ground have a certain height, but, now, also don’t know from when on, overhead lines start disappeared from our view, the disappear does not mean no overhead lines here, of course, but this overhead lines into the ground, and was buried in the ground. What the hell is going on here? What good is the overhead line going into the ground? Next, to talk to you about overhead line into the ground related knowledge, I hope you can understand.
Before starting to talk about the benefits of aerial line into the ground, we first look at a few news cases: Tongzhou District old government west section, Songzhuang Road, Defense South Road Defense North road, Hongyun Science and Technology Park road and other 83 roads, the “communication aerial line into the ground” on these roads, the road length is 45.398 kilometers, the estimated project investment: 137,425,900; Baotou Industrial Road south section of the main road (from Dongmen Street to Zhanbei Road) overhead line should also enter the ground; Shanghai Xuhui and Changning, Sichuan, are also working together to push the overhead line into the ground and consolidation work…… These news are the recent cases of overhead wire into the ground.
As for why the overhead wires go into the ground? So what are the benefits of overhead line entry? We have to understand the reason for overhead line into the ground, it is reported that many places need overhead line into the ground, because the overhead line is easy to be affected by environmental conditions, so that the lines of these places often power outage, “the store does not dare to use high-power appliances”, afraid of in case of thunder and rain, causing casualties. However, after the overhead line into the ground, it is not the same, through renovation, the road on both sides of the fresh, conducive to the improvement of the urban environment; Effectively avoid distribution network failure caused by bad weather and external damage, greatly reduce the number and scope of power failure, while improving the safety and reliability of the power grid, which is a great benefit for us.
Post time: Jul-08-2022
