Transformer enclosed busbar

Abstract

The utility model discloses a transformer enclosed bus, which comprises a transformer bus, a sealing shell, a first drain pipe, a liquid level sensor, a humidity sensor, a controller, an outer circulating pipe, a fan and a condensing device, a sealed cavity is formed between the sealed shell and the transformer line bus, the first water drainage pipe is connected to the bottom of the sealed cavity, the liquid level sensor is located in the first water drainage pipe, the first water drainage pipe is provided with an electric control valve below the liquid level sensor, and the electric control valve is connected with the first water drainage pipe. The humidity sensor is located in the closed cavity, the two ends of the outer circulating pipe are communicated with the closed cavity respectively, and the fan and the condensing device are located on the outer circulating pipe. The technical scheme is used for solving the technical problem of bus flashover caused by the fact that the existing transformer enclosed bus is easily permeated by moisture or rainwater.

Description

Technical Field

[0001] The utility model belongs to the technical field of transformer equipment, and in particular relates to a closed busbar of a transformer. Background Art

[0002] Transformer busbars are usually set as enclosed busbars due to their high voltage and potential safety hazards. Enclosed busbars (Enclosed busbars or Closed busbars) are busbar systems composed of metal plates (steel plates or aluminum plates) as protective shells, conductive bars, insulating materials and related accessories. The phase-isolated enclosed busbars are protected by shells, which can prevent the occurrence of phase-to-phase short circuits and reduce the electric force of phase-to-phase short circuits. Generator enclosed busbars can also improve the safety of generator operation.

[0003] However, the existing enclosed busbars are prone to sealing failure during long-term operation, especially when the external temperature changes, and external moisture can easily penetrate into the enclosed busbar, causing the insulation strength of the enclosed busbar to decrease, and there is a risk of busbar flashover. More seriously, rainwater or condensation may penetrate into the enclosed busbar, causing water accumulation, resulting in insulation degradation and causing failures. Utility Model Content

[0004] Aiming at the technical problem that the existing transformer enclosed busbar is easily penetrated by moisture or rainwater and causes busbar flashover, the utility model provides a transformer enclosed busbar, which can better control the internal humidity and avoid the problem of insulation strength reduction.

[0005] The utility model provides a transformer closed bus, comprising a transformer bus, a sealed shell, a first drain pipe, a liquid level sensor, a humidity sensor, a controller, an external circulation pipe, a fan and a condensing device, wherein the sealed shell is covered on the outside of the transformer bus, and a closed cavity is formed between the sealed shell and the transformer bus, the first drain pipe is connected to the bottom of the closed cavity, the liquid level sensor is located inside the first drain pipe, the first drain pipe is provided with an electric control valve at a position below the liquid level sensor, the humidity sensor is located inside the closed cavity, two ends of the external circulation pipe are respectively connected to the closed cavity, the fan and the condensing device are located on the external circulation pipe, and the controller is electrically connected to the liquid level sensor, the humidity sensor, the fan, the condensing device and the electric control valve respectively.

[0006] Furthermore, the condensing device is provided with a semiconductor refrigeration sheet.

[0007] Furthermore, a second drain pipe is provided at the bottom of the condensing device.

[0008] The closed busbar of the transformer is provided with an external circulation pipe outside the sealed shell, and a humidity sensor is provided inside the sealed shell. When the humidity sensor senses that there is a risk of flashover due to rising humidity in the closed cavity, the air flow circulation of the external circulation pipe can be driven by the fan, and the condensing device can be started for refrigeration, so that the water vapor in the closed cavity is condensed into water in the condensing device and discharged, thereby reducing the humidity in the closed cavity and reducing the risk of insulation degradation; when water accumulation is detected in the first drain pipe, it means that it is difficult to meet the dehumidification requirements through the condensing device, and there may be a problem of rainwater infiltration. At this time, the electric control valve is opened to discharge the accumulated water in time, thereby solving the problem in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0010] Figure 1 The figure is a schematic diagram of the structure of a transformer enclosed busbar. DETAILED DESCRIPTION

[0011] The utility model discloses a transformer enclosed busbar, which can better control internal humidity and avoid the problem of insulation strength reduction.

[0012] The following will be combined with the drawings in the utility model to clearly and completely describe the technical solution in the utility model. Obviously, what is described is only a part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0013] See also Figure 1As shown, the utility model discloses a transformer closed bus, including a transformer bus 5, a sealed shell 9, a first drain pipe 7, a liquid level sensor 8, a humidity sensor 11, a controller 10, an external circulation pipe 1, a fan 3 and a condensing device 2, the sealed shell 9 is covered on the outside of the transformer bus 5, and a closed cavity is formed between the sealed shell 9 and the transformer bus, the first drain pipe 7 is connected to the bottom of the closed cavity, the liquid level sensor 8 is located inside the first drain pipe 7, the first drain pipe 7 is provided with an electric control valve 6 at a position below the liquid level sensor 8, the humidity sensor 11 is located inside the closed cavity, the two ends of the external circulation pipe 1 are respectively connected to the closed cavity, the fan 3 and the condensing device 2 are located on the external circulation pipe 1, and the controller 10 is electrically connected to the liquid level sensor 8, the humidity sensor 11, the fan 3, the condensing device 2 and the electric control valve 6 respectively.

[0014] The condensing device 2 is provided with a semiconductor refrigeration sheet.

[0015] A second drain pipe 4 is provided at the bottom of the condensing device 2 .

[0016] The closed busbar of the transformer is provided with an external circulation pipe 1 outside the sealed shell 9, and a humidity sensor 11 is provided inside the sealed shell 9. When the humidity sensor 11 senses that there is a risk of flashover due to rising humidity in the closed cavity, the air flow circulation of the external circulation pipe 1 can be driven by the fan 3, and the condensing device 2 can be started for refrigeration, so that the water vapor in the closed cavity is condensed into water in the condensing device 2 and discharged, thereby reducing the humidity in the closed cavity and reducing the risk of insulation degradation; when water accumulation is detected in the first drain pipe 7, it means that it is difficult to meet the dehumidification requirements through the condensing device 2, and there may be a problem of rainwater infiltration. At this time, the electric control valve 6 is opened to discharge the accumulated water in time, thereby solving the problem in time.

[0017] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A transformer enclosed busbar, characterized in that: The invention comprises a transformer bus, a sealed shell, a first drain pipe, a liquid level sensor, a humidity sensor, a controller, an external circulation pipe, a fan and a condensing device. The sealed shell is covered on the outside of the transformer bus, and a closed cavity is formed between the sealed shell and the transformer bus. The first drain pipe is connected to the bottom of the closed cavity. The liquid level sensor is located inside the first drain pipe. The first drain pipe is provided with an electric control valve below the liquid level sensor. The humidity sensor is located inside the closed cavity. Both ends of the external circulation pipe are respectively connected to the closed cavity. The fan and the condensing device are located on the external circulation pipe. The controller is electrically connected to the liquid level sensor, the humidity sensor, the fan, the condensing device and the electric control valve respectively.

2. A transformer enclosed busbar according to claim 1, characterized in that: The condensing device is provided with a semiconductor refrigeration sheet.

3. The transformer enclosed busbar according to claim 1, characterized in that: A second drain pipe is arranged at the bottom of the condensing device.

Images