The Switching Function Of Electrical Substation

There is one vital function of substation construction, that is called the switching function, which is used as a connecting and disconnecting of transmission lines or some other components from the system. Usually, the switching events may be planned or unplanned. Transmission line or other components need to de-energized for maintenance and new construction. Take adding or removing a transmission line as example. Aslo, even no company will bring down its full system for maintence. From rountine testing to adding new transformer substation, all work should be performed, must be done while keeping the whole system running.

What’s more, there is something fault happened in a transmission line. Sometimes a line is hit by lighting or a steel tower is blown down by the heavy wind. The switching function of the electrical substation is to isolate the faulted part of the system as soon as possible. De-energizing faulted equipment can protect it from damage, while isolating a fault can help to keep the rest of electrical grid on a stable operation.

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Function Of Tower Structures

It is common for us to see there are many tower substation structures on the road, but few of us know what are they used for? Actually, such a framework, is playing a vital role in our daily life.

Most of time, tower substation structures always can be divided by the way in which they support the line conductors. Suspension sreuctures support the conductor that vertically uses suspension insulators. While strain structure resist net tension in the conductors and the conductors combine with the structure through strain insulators. Abd dead-end structures support the full weight of the conductor and also all the tension in it, and also use strain insulators.

Moreover, structures are classfied as tangent suspension, angle suspension, tangent strain, angle strain, tangent dead-end. A tangent tower often used where the conductors are in a straight line. While lattice tower are used where a line must change direction.

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Lattice Tower

A lattice tower, also called angle steel tower or electrical tower, is one kind of freestanding framework tower for power transmission line of all voltages, often designed as a space frame or a hyperboloid structure. They are widely used as an electricity transmission towers especially for voltages above 100 kilovolts, being as a self-radiating tower or a carrier of aerials, even a observation tower.

Before 1940, lattice towers were often used as radio transmission towers for short and medium wave, sometimes these lattice towers are made of wood material. In that time, the tallest wooden lattice tower was at Mühlacker, Germany, which has 190 meters, equal to 620 feet, it was built in 1934 and demolished in 1945. Many wooden lattice towers were demolished before 1960. In Germany, the last largest radio tower made of wood were the electric transmission tower of Golm transmitter and the transmitter Ismaning. However, they also were demolished in 1979 and 1983 respectively.

For now, most lattice tower is made of steel and aluminium materials. The most common lattice tower is used for high voltage transmission lines. Steel lattice tower is popular, while the aluminium one is lighter. But the addtional cost of the aluminium tower can be offset by lower installation cost. The Both lattice tower design is similar.

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Informations About Tubular Steel Poles Tower

Tubular steel poles tower as one classical electrical poles tower, generally is made of tubular steel and assembled at the original factory and put on the right-of-way afterward. Most of time, a number of public business would rather take use of the monopole steel or the concrete towers, lattice tower for full new power transmission lines and tower replacements. For its good function to save space and durability, these transmission line towers are widely used in the road of the city to replace the wooden and some other concrete towers.

It is common to see tubular steel poles tower is widely in each country in the world, while different countries have different requirement on the choice of the poles tower. In Germany, The steel tubular poles is bulit mainly for the medium voltage transmission line. What’s more, for two electric circuit for operating voltages and high voltage transmission lines by up to 110 KV. While in the United States, steel poles tower are often used for 500 KV. And for 380 KV transmission lines in France.

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Informations About Transmission Tower

Transmission Tower is one tall and large structure, which often is a steel tower lattice tower, widely used to support an overhead power line. While in the United Kingdom and some areas of Europe, some provinces of Canada, the electric pylon tower and hydro tower are usually as the hydro-electric tower. These steel towers are used in high voltage AC systems and DC systems, having various kinds of shapes and sizes. Generally, the tower’s classical height is from 15 to 55 meters, equal to 49 to 180 feet, while the tallest tower is the 370 meter tower, one 2700-meter-long span to Zhoushan Island overhead powerline tie. Apart from the steel material, some other materials like concrete and wood can also used.

Normally, the transmission tower can be divided into four main categories, namely suspension, terminal, tension and transposition respectively. Some transmission tower have these basic performances. However, transmission tower and their overhead power lines are often thought to be a kind of visual pollution. Nowadays many manufacturer has taken some measures to deal with the problem, among which the undergrounding will be a good choice.

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Disheng Steel Tower “Single-base Flow” Production Mode

Steel Towers industry has adopted the traditional mode of production for a long time, whose production process is easy to appear errors such as drilling holes and dislocation; When packing and delivery, it is easy to appear mixed bag, such as pieces of leakage errors; When the delivery to station of construction materials, various batches of iron tower materials placed together, that is easy to repeat mistakes when sorting, and greatly increase the work volume; At the same time, due to batch production cycle is long, there are limited production problems and the delivery date cannot be guaranteed.

To fully meet customer demand, Guangdong Disheng Power Steel Structure Co.,Ltd break the mode of traditional mass production of the steel tower industry, pioneered tower single-base flow production mode in 2009. The model with the study of the scientific design and layout of production lines, forms an unit production mode, all parts in a fundamental complete tower, on an assembly line, which can reduce the logistics process, such as handling, whilst minimizing error rate, building a new process for single-base seamless operation. Product packing and fast delivery also takes the single-base mode to reduce the material yard. That is to say, from parts to the whole tower assembly to complete the whole chain is single-base flow mode. Practice has proved that single-base flow mode not only has low error rate and accurate delivery, brings great convenience for the construction site, but also for export project and temporary, emergency order, it can meet the emergency needs of customers in a timely manner, this cannot be done by the traditional mass production mode.

Southern Power Grid Newspaper in 2012 on May 5, the special report of Guangdong Disheng Power Steel Structure Co.,Ltd single-base flow production mode is the first industry of this world. In recent years, the company has took part in a number of domestic huge project, getting a good reputation in many of the suppliers quality, delivery, installation, with a comprehensive evaluation: fast delivery, less short, high accuracy, good appearance, single-base flow in place has brought great convenience to construction.

Considering for meeting the customers’ demand on steel towers, and make great invention, Disheng’s single-base flow production is well received by lots of customers from all over the world. Welcome to contact us for more steel transmission tower informations.

Various Classifications Of Transmission Towers

Transmission systems are accustomed to go signal cables and electrical current to place from place. They are often made of material and will work sometimes for long distances. Transmission towers ‘re normally used if you find lots of electric current to be distributed, typically between 765 and 115,000,000 volts. Several different types of transmission systems have been in extensive use within the planet today.

Lattice Steel Towers

Lattice steel towers comprise of several different metal structural elements linked as well as products or welded. A variety of types of lattice steel towers exist. These towers may also be called selfsupporting transmission towers or free-standing systems, due to their power to help themselves. These systems are not always made from steel; they can also be made from aluminum or galvanized steel.

Simple and Double-Circuit Towers

Lattice steel towers and both tubular can be created to be able to support either one or two circuits of electrical current. Dual-signal systems hold the various conductors stacked atop each other, whilst in single-signal systems the conductors are lined up horizontally.

Guyed Towers

Guyed towers occupy a great deal of house, and so are therefore only used in areas of the planet where land use policy allows them. They consist of two masts supported by four people, or support cables.

Tubular Steel Poles

Tubular steel rods are another of the major forms of transmission systems. They’re comprised of hollow aluminum rods. Tubular steel poles might be made as several small parts which fit together, or as you big part.

Suspension Right Towers

Suspension right systems are a kind of self-supporting tower that stands along straight chapters of a transmission route. These towers are also sometimes called tangent towers. The only function of these forms of towers will be to suspend the wires. Manage or they don’t need to produce stress at all.

Suspension Direction Towers

When it is required for the way of the electric current to show suspension angle towers are built. These angle systems are usually developed so the axis of the cross-arm bisects the position of the conductors. This is the most effective method to utilize the system.

Anchor and Angle Tension Towers

Point and position tension systems are accustomed to sectionalize the tracks. They terminate the conductors and so they provide containment of possible cascade failures.

Terminal Transmission Towers

Fatal transmission systems are in the conclusion of any course. They provide termination of the most conductor tensions.