A Miniaturized Parallel Capacitor Device for Urban Substation

Abstract

The invention discloses a miniaturized parallel capacitor device of a city transformer station. The miniaturized parallel capacitor device of the city transformer station comprises a fence and a disconnecting switch arranged inside the fence. The disconnecting switch is connected with a series reactor and a capacitor bank. The disconnecting switch is mounted on the wide surface of the fence and is located on the side of a passageway. An inlet wire cable of the disconnecting switch is directly led upward along a wall from the bottom layer and is connected with the disconnecting switch after spanning over the upper portion of the series reactor. According to the technical scheme, the miniaturized parallel capacitor device of the city transformer station has the advantages that installation size is small, arrangement form is reasonable, installation of cables becomes convenient, more than 50% of building area can be saved, problems such as interference of leakage flux on secondary and communication devices, noises and vibration can be solved; and as a monomer large volume capacitor unit is adopted, manufacturing cost of a capacitor can be reduced, and economic efficiency is good.

Description

technical field [0001] The invention relates to a parallel capacitor device, in particular to a miniaturized parallel capacitor device for an urban substation. Background technique [0002] City changes, there are two layouts: one building and two buildings. The whole indoor layered layout, the main transformer and 10kV power distribution device are arranged on the first floor, which is convenient for the installation of the huge and heavy main transformer and the 10kV cable outlet; the 220kV, 110kV power distribution device can be arranged on the bottom layer and the upper layer according to the situation; the parallel capacitor device Due to its light weight and few cables, it is generally arranged on the upper floor. [0003] At present, the factory has not yet produced special products for indoor substations, and still uses outdoor 10kV capacitor devices. This series of products has the following characteristics: [0004] a) The size of the capacitor device is relative...

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Problems solved by technology

[0009] 1) In the case of a certain total capacity, the smaller the individual capacity of the unit capacitor, the more the number of unit capacitors, resulting in a larger volume;

[0010] 2) The current-limiting reactor adopts a dry-type air-core reactor with a large body size, and because it has no iron core, the magnetic flux leakage is large, and the magnetic shielding distance needs to be considered during installation, which increases the entire device;

[0011] 3) The manufacturer did not consider installing it indoors, and did not make efforts to miniaturize, which is also the reason for the large size of the capacitor device;

[0012] 4) Since the size of the overall device is too large, it will occupy the space on the first floor of the entire power distribution building, which does not match the size of the power distribution building and is not coordinated;

[0014] 6) The electrical equipment of the indoor station is all installed indoors, the equipment layout is compact, and there are many secondary equipment and secondary cables; in addition, the equipment layout is relatively close to the operating personnel, and the following situations inevitably occur: use dry-type hollow series reactance , the external magnetic field is large, which may interfere with the secondary system, communication system, etc.; the dry-type iron core series reactance is used, the noise is large, there is vibration, and it will cause noise interference to the operating personnel

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