Do you know anything about oil-immersed transformers?
Our daily life is inseparable from electricity, and the transformer is the basic equipment of power transmission and distribution, widely used in industry, agriculture, transportation, urban communities and other fields. About the relevant knowledge of oil immersed transformer, the previous article has introduced its definition, performance characteristics and application scope, today let's continue to understand the other knowledge of oil immersed transformer.
Classification of oil-immersed transformers
1.Distinguby phase number
Oil-immersed transformers can be divided into three-phase transformer and single-phase transformer. In the three-phase power system, the three-phase transformer is generally applied. When the capacity is too large and limited by the transportation conditions, three single-phase transformers can also be used in the three-phase power system.
2.Distinguby winding
Oil-immersed transformers can be divided into double-winding transformer and three-winding transformer. Usually the transformers are double-winding transformers, that is, there are two windings on the core, one for the original winding, and one for the secondary winding. The three-winding transformer is a transformer with a large capacity (above 5,600 kVA), which is used to connect three different voltage transmission lines. In special cases, there are also Satons transformers with more windings applied.
3.Classification by structure
Oil-immersed transformers can be divided into iron core type transformer and iron shell type transformer. If the winding is wrapped around the core, if the core is wrapped around the winding is the core transformer. The two are only slightly different in structure, with no essential difference in principle. Power transformers are all iron-core type.
The transformer is mainly composed of iron core, winding, oil tank, oil pillow, insulated casing, tap and switch and gas relay.
Operation mode of the oil-immersed transformer
The top oil temperature of the oil-immersed transformer shall not exceed the provisions of the operating rules or the manufacturer. For the transformer with forced oil circulation and water cooling, the top oil temperature should not often exceed 700℃. Strong oil circulating cooling transformer shall be capable to temperature and (or) load control cooler. Transformer put into operation should regularly monitor the instructions of instruments and timely grasp the operation of the transformer. If the defects or abnormal phenomena are found, measures should be taken to eliminate them in time. If it cannot be eliminated at the time, the surveillance must be strengthened. Prevent the accident from expanding. And determine the countermeasures as quickly as possible.
1.Water supply mode of the transformer cooling water system
The cooling water is generally taken from the technical water supply pipe of the water supply pipe of the unit, and the cooling water is generally taken from the public water supply main pipe of the power station during no-load operation, and pressurized to the transformer by the no-load cooling pump.
2.Drainage mode of the transformer cooling water system
Under normal circumstances, the cooling water of the transformer during no-load and load is discharged to the tail pipe of the unit through the drainage main pipe of the unit technical water supply system. The drainage pipe of each transformer is equipped with a connecting connection valve. When the connection valve is closed normally, when the tail pipe of the unit is required to be empty and the transformer is still in narrow load operation. The connection valve of the transformer and the adjacent transformer can be opened to drain the no-load cooling water to the tailpipe of other units.
At present, the price of oil-immersed transformer in the market is mainly affected by the market supply and demand, but also by the specifications and process level of raw materials used by different manufacturers. The market price of the oil-immersed transformer is about $14,138, but this quotation is for reference only, and the specific price needs to be asked by the manufacturer.
There are many Chinese oil immersed transformer manufacturers, the technology is very mature, there are many advanced manufacturers, such as SHZPower is a professional oil immersed transformer Chinese manufacturer, if you want to know more about the oil immersed transformer, want to find high quality oil immersed transformer, welcome to email inquiries.
