Transformer Electric Transmission Substation Structure 220kv

High quality Transformer Electric Transmission Substation Structure 220kv is offered by China manufacturers Mao Tong. Buy Transformer Electric Transmission Substation Structure 220kv which is of high quality directly with low price. Maotong® professional transmission electric substation ,The classification and characteristics of substations are briefly described.When it comes to power grids, you can't do without substations. A substation is a facility at the junction of lines in a power network for changing voltages, exchanging power, and collecting and distributing electric energy.
 

If divided according to the layout of substation, substation can be generally divided into outdoor substation, indoor substation and underground substation. Indoor substations are divided into all-indoor substations and half-indoor substations according to the layout of main transformers and main high-voltage electrical equipment. Outdoor substation, main transformer and main high-voltage electrical equipment are arranged outdoors. 

This arrangement occupies a large area, and the electrical devices and buildings can fully meet the requirements of various types of distance, such as electrical safety distance, fire distance, etc., which is convenient for operation, maintenance and overhaul. It is suitable for construction in suburban or rural areas.

The whole indoor substation, the main transformer and all the high and low voltage electrical equipment are arranged in the indoor. This type of substation reduces the total floor area, but has higher requirements for the interior layout of the building. It has the characteristics of compact, large height difference and different storey height, which is easy to meet the needs of the surrounding landscape. Suitable for urban densely populated areas, or located in coastal areas, salt lakes, chemical plants and other areas with high levels of air pollution. 

Half indoor substations, the main transformer or main high voltage electrical equipment layout in the outdoor, indoor station were combined in the way to save area, beautiful harmony with surroundings, equipment operation condition and outdoor type transformer substation, the advantages of relatively low cost in economy is relatively developed small towns as well as the need to give full consideration to the environment and the coordination of economic and technical index of the regional construction.

 

Underground substations are divided into fully underground substations and semi-underground substations. The main building of the whole underground substation is built underground, and the main transformer and other main electrical equipment are installed in the underground building. 

Only a small number of buildings such as substation vents and equipment, personnel entrances and exits are built on the ground, as well as the cooling equipment and main control room of the large main transformer that may be arranged on the ground. Semi-underground substations are mainly underground buildings, and the main transformers or other main electrical equipment are partially installed in the underground buildings. Underground substation is suitable to be built in densely built-up and densely populated areas.

According to the status and function of the substation in the power system, the substation can be generally divided into hub substation, regional important substation and general substation.

The hub substation is located at the pivot point of the power system. The voltage of the high voltage side is generally 500 (750) kV, and the voltage of the medium and low voltage side is generally 220kV (330kV) and 35kV. The high-voltage side of the hub substation is connected to the regional power grid and connected to several large power sources, and there is a large amount of power transmission on the high-voltage side. 

The substation is equipped with several large-capacity power step-down transformers, which download power from the regional grid and supply power to important substations in the region. The load side of this kind of substation is often the main power point of regional power grid. After the power failure of the whole station will make the system stable damage, the collapse of the power grid, resulting in a large area of power failure.

Regional important substations are located at the pivot point of the regional network. The voltage of the high voltage side is generally 220 (330) kV, and the voltage of the medium and low voltage side is generally 110kV and 35kV or 10kV. This type of substation mainly downloads power from the regional power grid and supplies power to the regional distribution network or directly to the users. After the power failure of the whole station, it can cause the collapse of the regional power grid and affect the power supply of the whole region. 

This type of substation has different requirements for main electrical wiring due to different power grid structures in different regions. For example, when the regional power grid structure is strong and N-1(or N-2) configuration is realized, the requirement for the reliability of the electrical main wiring of the substation is relatively reduced.

A general substation is located at the end of a district network, also known as a terminal substation. The high voltage side voltage is mostly 110kV, but also 220kV, and the middle and low voltage side voltage is generally 35kV and 10kV. There are also high voltage side 110kV or 220kV directly down to 35kV or 10kV. The step-down power supply is used by nearby customers or businesses. After the power failure of the whole station, only the nearby users and enterprises are affected, and the impact scope is small.