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Hot oil spray and drying device and method for converter transformer

A converter transformer and spray drying technology, applied in the field of transformers, can solve the problems of insulation breakdown, internal discharge of the transformer, and water discharge without reliable drying measures, and achieve fast spraying speed, improve work efficiency and good effect. Effect

Inactive Publication Date: 2015-02-04
TIANSHENGQIAO BUREAU CSG EHV POWER TRANSMISSION CO
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the converter transformer may bring moisture in the air during bushing installation, and there is no reliable drying measure to drain the moisture in the transformer oil and insulating components after oil filling
Moreover, important large-scale transformers will only carry out thermal oil circulation process measures for a certain period of time after installation, and the transformer will be put into operation without drying measures after the oil test passes the test. Internal discharge or even insulation breakdown during commissioning or operation

Method used

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  • Hot oil spray and drying device and method for converter transformer
  • Hot oil spray and drying device and method for converter transformer
  • Hot oil spray and drying device and method for converter transformer

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Embodiment

[0040] 1. Preparation before drying

[0041] The drying of the converter body is mainly to dry the insulating parts and other materials inside the converter body. Due to the site conditions, the converter can only be slightly modified and then sprayed with hot oil.

[0042] The method we adopt is to install a sprinkler head on the cover of the converter box, and spray hot oil with a temperature as high as 120°C into the sealed chamber 1 through the nozzle, so as to achieve the purpose of drying the accessories in the converter box. Each spray head is connected to each branch oil pipe, and the branch oil pipes are collectively connected to the general spray oil pipe. The general spray oil pipe is connected to the oil outlet of the hot oil sprayer, and the transformer oil after the hot oil spray is collected in the The bottom of the converter box, through the oil outlet at the bottom of the converter box, flows back into the sprayer to be heated and then flows out from the oil o...

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Abstract

The invention discloses a hot oil spray and drying device for a converter transformer. The hot oil spray and drying device for the converter transformer comprises an oil supply device, a spray pipe, a vacuum unit, a drying air generator and a converter transformer body, wherein a sealing chamber is arranged on the periphery of the converter transformer body, the sealing chamber comprises an upper cover installed on the upper side, a spray pipeline is installed on the upper cover and is respectively communicated with the oil supply device and the sealing chamber, the vacuum unit and the drying air generator are respectively communicated with the sealing chamber, three insulating pieces which are used for inspecting the drying effect of the sealing chamber are installed in the sealing chamber, the insulating pieces are respectively installed at the bottom of a tap switch of the converter transformer, the bottom of windings and the top of the windings, and a heating plate is installed on the lower side of the sealing chamber. The invention further discloses a hot oil spray and drying method of the converter transformer, which comprises the steps of insulating oil filling, normal-pressure hot oil spray, vacuum pumping and vacuum release. The hot oil spray and drying device and method for the converter transformer have the advantages of quick spray speed, thorough drying, high reliability and practicability and easiness in field operation.

Description

technical field [0001] The invention relates to the technical field of transformers, in particular to a hot oil spray drying device and method for a converter transformer. Background technique [0002] The converter transformer (referred to as the converter transformer) is the main equipment of the DC transmission system, and its main parameters are determined according to the special requirements of the DC system. The function of the converter transformer is to supply AC power to the converter or receive AC power from the converter, and convert the grid-side AC voltage into the voltage required by the valve side. As the connection between the AC network and the high-voltage DC network, compared with ordinary transformers, it not only needs to provide 12-pulse AC voltage with a phase difference of 30° for the valve hall equipment, but also has a larger impedance to limit the impact of the AC system on the mainstream system. Intrusion, which determines that the structure of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/14F26B7/00
Inventor 马虎涛黄徐欧松松李标俊张望平黄章强张镭刘伟贺尧杨健唐海名杨跃辉冯战武
Owner TIANSHENGQIAO BUREAU CSG EHV POWER TRANSMISSION CO
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