Box-type substation is a new type of equipment that can penetrate the load center as power and distribution. Its application has just begun in our country, Box Type Transformer Substation it adapts to the power system transmission and transformation equipment to the oil-free, small, low loss, low noise, complete sets, no pollution, maintenance-free direction, Rapid and convenient, reliable operation, easy to move, less investment, etc., more and more by the user's trust and affirmation, is being widely used.
Second, the structural performance of box-type substation
Box-type substation is composed of high-voltage switchgear, transformers, low-voltage switchgear and power compensation devices in one or several boxes to form a compact variable distribution complete sets of devices. Box Type Transformer Substation It is mainly used to replace the traditional civil construction substation, to achieve variable distribution function. At present, it is mainly used for 3-35KV power distribution system users. High-voltage lines into the box-type substation, after high-voltage switch, from the transformer into a low pressure, Box Type Transformer Substation and then by the low-voltage main switch and branch switch to the final power equipment. Box variable specifications more specific can be classified as:
1) from the wiring program points: can be divided into single-ended circuit, double-ended circuit, ring network three programs.
2) according to the use of conditions: can be divided into both indoor and outdoor forms.
3) by structure: can be divided into one and split. Box Type Transformer Substation Integral mainly used for outdoor, split mainly used for indoor.
4) from the shell points: can be divided into steel shell, composite panel shell, aluminum alloy shell and so on.
Third, the characteristics of box-type substation
Box-type substation for the combination of complete sets of products, it compared with conventional equipment has the following characteristics:
1) compact, investment province, Box Type Transformer Substation less land. As the box change is the distribution of several large parts of the layout of the box, through the optimization of design, a reasonable combination of the insulation between the parts greatly reduced. Compressed area and floor space. Box change area of about 6-10M2, can be placed directly on the green belt. The design data show that compared with the traditional civil substation, the use of box change can reduce the area of about 80%, and save land acquisition and housing costs about 60%.
2) easy to install, fast construction. Box of the main components and secondary wiring are assembled in the factory, and commissioned by the commissioning and factory test after passing to the scene, the installation only to be suspended in the civil base to be fixed, one day can be installed Put into operation, Box Type Transformer Substation greatly simplifies the installation, greatly reduce the workload, speed up the construction progress, shorten the installation period, saving construction costs, with significant economic value.
3) higher reliability and safety. Ordinary conventional substation electrical equipment, due to long-term outdoors, the insulation and the conductor easily due to atmospheric pollution and deterioration. And the box change due to the characteristics of structural design, conductor, internal insulation, contact parts are completely enclosed in the box, the shell of the protection level can generally be IP2X and IP3X or higher, not susceptible to external pollution, , Salt damage, fog, animal and external damage caused by the accident and the higher reliability. The box does not have exposed exposed conductors exposed to the outside of the box, and does not cause shortsheets and electric shock hazards. High pressure side has a complete five anti-measures, with mechanical and electrical chain, high security.
4) Universal interchangeability. High and low voltage equipment and components can choose a variety of famous or imported products; transformers can choose dry or oil-immersed transformers, electrical components, versatility, interchangeable Strong sex.
5) easy operation and maintenance. Each room has automatic lighting device, transformer room with rail and transformer car, easy to install the transformer, replace, open the door to the high and low pressure room can be maintained.
6) access to the cable flexible. High-pressure introduction using cable or overhead line, low voltage leads to the use of cable, the introduction of the cable can be buried directly or channel laying to high voltage power supply and users can also lead to the poles.