Modular box transformer substation of power distribution device

Abstract

The invention discloses a modular box transformer substation of a power distribution device. The modular box transformer substation comprises a complete set of box body shell, a high-voltage cabinet,a low-voltage cabinet and a transformer, and is characterized in that the high-voltage cabinet adopts the following modular structures that: a bus, a cable and a load switch in the high-voltage cabinet respectively adopt standard modular structures which are independently formed into a box to form a switch box, a bus chamber and a cable chamber; the switch box mainly comprises a cubic switch box body, a load switch, a switch mechanism, an input bus connector clip and an output bus connector clip, wherein the input bus connector clip and the output bus connector clip form a pair of bus connector clips and are located on the wall surface, adjacent to the bus chamber, of the switch box body. The modular box transformer substation of the power distribution device adopts a more reasonable standard modular structure, standard high-voltage modules in a high-voltage cabinet can be quickly replaced on site, and the maintenance time and the urban device maintenance cost are greatly reduced.

Description

technical field [0001] The invention relates to a box change, in particular to a modular box change of a power distribution device. Background technique [0002] Box-type substation, also known as prefabricated substation or prefabricated substation, is a factory prefabricated transformer, high-voltage switchgear and low-voltage power distribution device arranged according to a certain wiring scheme. Indoor and outdoor compact power distribution equipment, which organically combines the functions of transformer step-down and low-voltage power distribution, and is installed in a moisture-proof, rust-proof, dust-proof, rodent-proof, fire-proof, anti-theft, fully enclosed, and movable Inside the steel structure box, it is especially suitable for the construction and transformation of urban network. In the prior art, there are several types of box-type transformers, such as European-style box-type transformers, American-style box-type transformers, and domestic box-type transfo...

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Problems solved by technology

But in this way, if the high-voltage switchgear fails, since the complete set of load switches is located in the high-voltage box 1 filled with insulating gas, and there are both mechanical connections and cable connections between the multiple high-voltage boxes 1 in the high-voltage cabinet , it is very difficult to remove and replace the faulty high-voltage cabinet on site, so the maintenance method of replacing the high-voltage cabinet as a whole can only be used, that is, the entire high-voltage cabinet is removed, and a new high-voltage cabinet is installed. However, due to the large volume of the existing high-voltage cabinet (at least more than 1 cubic meter), heavy weight, the site needs to use a crane to lift the high-voltage cabinet as a whole, and then transport it back to the factory, the maintenance project is huge and cumbersome, it takes up a lot of time on the site environment, time-consuming and labor-intensive, and the maintenance cost is huge

[0009] 3. Since there are both mechanical connections and cable connections between multiple high-voltage boxes 1, when removing the faulty high-voltage box 1, it is necessary to unplug the cables connecting multiple high-voltage boxes 1 to each other, and then untie the high-voltage box 1, the faulty high-voltage box 1 can be removed. Correspondingly, when replacing and installing a new high-voltage box 1, it is also necessary to reconnect the cables and mechanical connection structures between multiple high-voltage boxes 1, resulting in a long maintenance period and difficulty. Big, high-maintenance problem

As we all know, in the maintenance of power circuits, the primary purpose is to restore the power supply as soon as possible, but it takes 1-2 days or even more time to disassemble and hoist the box substation, plus the cycle of re-production and installation, which seriously affects the power demand of users , which brings great difficulties to urban circuit maintenance

[0010] 4. The high-voltage cabinet adopts an independent functional box structure, and the high-voltage switchgear of each box-type substation is different, which cannot realize the generalization of components, which is not conducive to the construction of spare parts, increases maintenance funds, and also affects maintenance efficiency;

[0011] 5. The increase of the inlet and outlet branches of the high-voltage cabinet can be realized by splicing the cabinets or multi-organization horizontally sharing the same box, but at the same time, the increase in the inlet and outlet branches will significantly increase the occupied area. Although the buried box substation is buried Underground, but it will also greatly increase the workload and difficulty of construction;

[0012] 6. The compensation cabinet in the low-voltage cabinet is designed according to the compensation design scheme of the initial predicted line. Since a box-type transformer is to control the power equipment in an area, there are many users involved. From the box-type transformation to the specific user needs to connect The actual use time of many switchgears in the low-voltage cabinet is different, and the time span may be relatively large, such as 1 to 3 years or even longer. As a result, there are not many electrical equipment used by users in the early stage, and most of the compensation lines are idle, resulting in Waste of resources, and due to the influence of changing external environmental factors, idle equipment will easily cause equipment aging in the long run. When it is put into use in the later stage, the probability of quality problems will increase, which will affect the safety of electricity use;

[0013] 7. On the other hand, because the existing box-type substations are pre-designed and configured according to the equipment planning, once installed, they become fixed equipment with low variability and scalability, which often restricts the needs of urban development and changes in turn: With With the development of the city, the user's demand for electricity is constantly increasing, and the nature of electricity consumption has changed greatly. After the box-type transformer has been put into operation for a period of time, the general coefficient may not meet the requirements, so it is necessary to increase the capacity of the equipment or add additional adjustments For branch roads, the existing box-changing equipment cannot be expanded due to the limitation of the fixed cabinet body. It is necessary to re-plan, design and purchase equipment, and carry out a large-scale transformation, resulting in the scrapping of the original equipment and the re-investment of new equipment, increasing social Cost expenditure, and it takes a long time, which affects the timeliness of power supply

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