Totally-closed transformer oil treatment system
A transformer oil and treatment system technology, applied in the direction of transformer/inductor cooling, etc., can solve problems such as improper sampling method, rough inside of the oil tank, and particle hazards in transformer oil, so as to reduce the number of cycles, reduce costs, and reduce work intensity Effect
Active Publication Date: 2012-05-16
STATE GRID CORP OF CHINA +1
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Problems solved by technology
[0011] 2 Analysis of the causes affecting the withstand voltage and particle size indicators
[0012] 2.1 The hazards of particulate matter in transformer oil
[0016] 2.2 Reasons affecting the granularity of transformer oil at the construction site
[0018] 2.2.2 The structure of the oil tank is unreasonable, the interior of the oil tank is rough, and the treatment of the oil tank is not thorough;
[0019] 2.2.3 Moisture, dust, and other impurities in the air during the process of pouring, transferring, and filtering transformer oil cause accidental pollution;
[0020] 2.2.4 Improper sampling method, insufficient container cleanliness and sampling environment (cleanliness of surrounding air) are all factors that affect the accurate judgment of indicators
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[0069] Operation procedures for oil treatment of transformer oil treatment three main pipe system
[0070] "Xining 750kV Substation Transformer Oil Treatment Operation Process", see the connection schematic diagram of the transformer oil treatment three-pipe system for details. The operating procedure is as follows:
[0071] 1. Vacuum dehumidification operation of oil storage tank:
[0072] Open the valve K1 of the vacuum pumping unit, the switching valve K3, and the air valves (K4, K5, K6, K7, K8, K9, K10, K11, K12) at the lower part of the oil storage tank, and close the other valves. The gas passes through the pipeline and valve k4 (K5, K6, K7, K8, k9, K10, K11, K12) from the No. 1-9 oil storage tank to the valve K3, and the valve K1 of the vacuum pumping unit is discharged into the atmosphere through the vacuum unit .
[0073] 2. The operation of injecting the transportation insulating oil into the oil storage tank:
[0074] Open the transport oil tank valve Y32, breat...
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The invention relates to a totally-closed transformer oil treatment system. With the development of electric power industry and the increasing of voltage level, the increasing of the pressure resistance index in requirements of characteristic indexes of 750 kV and more than 750kV voltage level transformer oil and the added requirements on graininess are keys of transformer oil treatment in 750 kVand more than 750kV voltage level oil charging equipment. The invention establishes a totally-closed transformer oil treatment system and utilizes an oil inlet, an oil outlet and a gas main pipe to connect the oil charging equipment, a vacuum oil purifier, a vacuum machine set, a dry air generator and a special-purpose oil storage tank into closed integration in order to make the whole transformer oil treatment be carried out in a closed system. An oil filter with oil filtering accuracy being more than 1mu m is adopted. The pressure resistance index of the transformer oil can reach the requirements of more than or equal to 70kV, and the graininess index can reach the requirements of smaller than or equal to 900 / 100ml (graininess more than 5mu m ) after oil treatment. The invention can be widely applied to graininess control of transformer oil in the 750 kV and more than 750 kV voltage level oil charging equipment, such as transformers, reactors, etc.
Description
technical field [0001] The invention belongs to a treatment method for power transformer oil. Background technique [0002] With the development of the electric power industry and the improvement of the voltage level, the requirements for the characteristics of transformer oil in oil-filled equipment are also getting higher and higher; "750kV power transformers, oil-immersed -2005) and 750kV and above voltage level transformers, reactor manufacturers have put forward new requirements for the characteristics of their insulating oil. [0003] 1 Analysis of Transformer Oil Characteristic Indexes for 750kV and Above Voltage Grades [0004] 1.1 The "750kV Power Transformer, Oil Immersed Reactor, Transformer Construction Technical Specification" (Q / GDW122-2005), "Electrical Installation Engineering Power Transformer, Oil Immersed Reactor, Transformer Construction and Acceptance Specification" GBJ148-90 ( Applicable to the inspection and acceptance of transformer oil at the volta...
Claims
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IPC IPC(8): H01F27/14
Inventor 张全安苏崇茹张晓青
Owner STATE GRID CORP OF CHINA