500MVA/765kV substation auto-transformer

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Quick Details

Place of Origin: HeBeiBrand Name:

CNBM

Model Number:

 

Usage:

Power

Phase:

Three

Coil Structure:

Toroidal

Coil Number:

3 Winding

Capacity: Rated Voltage:

500MVA/765kV

Connection Symbol:

YNd11 Dyn11 YNyn0d11

Tank:

Cover type or Bell type

OLTC:

MR or ABB or SMS

Packaging & Delivery

Packaging Detail:Mainbody --naked Disassembled parts -- crate
Delivery Detail:3 months

Specifications

 

1. CESI certificate
2. High short-circuit withstand
3. Low loss, PD and noise
4. CTQC certificate
5. No leakage

 

 Description

 

The application of 500MVA/765kV substation auto-transformer  can significantly improve the economy of the OLTC substation, and matches well with the transmission capacity of OLTC lines, which has wide prospect of application. Because of its large capacity and large volume, the whole transportation weight with nitrogen is about 470-490 tons, and due to the restricted transport conditions, the transportation becomes the critical issue for application of 500MVA/765kV substation auto-transformer. In order to make the products applicable to any  substation in our country, the state grid of corporation of China set the "A study of easy-transport large capacity  Transformer” as a key scientific research projects, and entrusted BTW to carry out the research.

During the process of research and development, BTW adopted the advanced design technology and modular design, the transformer can be transported disassembly and with advantages of compact core and winding body, less transportation weight and low transportation cost, effectively solves the need of OLTC construction in the transportation restricted areas. By using the most advanced 3D magnetic field calculation software, BTW performed detailed analysis and calculation for the magnetic flux leakage and eddy current loss of the transformer coil, iron core and oil tank steel structures. Besides, by using of the advanced electric field calculation software, BTW performed detailed analysis and calculation of main longitudinal insulation, and mastered the arrangement of the main longitudinal insulation of large capacity OLTCtransformer and the control of distribution of winding magnetic flux leakage. All of which make the products with low loss, low noise, small volume, strong anti short circuit ability, no local overheating and other significant advantages, and guarantee the long-term safe and stable operation.

The world's first on-site assembled large capacity OLTC Transformer’s right at the first time once again filled the gap in the field of OLTC transformer research after Chinese transformer industry overcame the difficulty of integral transport of 500MVA/765kV substation auto-transformer, which marks BTW has fully occupied the world transformer industry technical peak. The successful development of the product filled the gaps in the domestic technology and met the urgent need of UHV construction application in our country, greatly improved the technical level and manufacturing ability of BTW in terms of OLTC Transformer products.

 

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Q:Transformer is the transmission of electrical equipment
The transformer is an electrical device that converts the AC voltage level to achieve the purpose of power transmission.
Q:1000KVA transformer no-load loss is how much?
Transformer no-load loss is not the same, not only the manufacturers are not the same, is a manufacturer at the same time manufacturing two transformers, may be no load loss will not be exactly the same; Different types of transformer no-load loss is not the same, the larger the model, the smaller the no-load loss, such as S9 than the S7 no-load loss is small.
Q:What is the critical load of the economic operation of the transformer?
In order to increase the amount of active loss caused by the active loss of the system in the power system, a conversion factor is introduced, that is, the reactive power economic equivalent. Reactive power economic equivalent, is that the power system to send 1kvar reactive power, the power system will increase the number of active power loss kw, the symbol kq, unit kw / kvar. This kq value and the power system capacity, structure and calculation of the specific location and other factors. For the factory substation, reactive power economic equivalent kq = 0.02 ~ 0.15; Kq = 0.05 ~ 0.08; for the three or more transformer factory, take kq = 0.1 ~ 0.15 ~ 0.04; for the two-stage transformer factory, take kq = The
Q:What is the difference between transformers and inverters?
The inverter is a DC power supply into AC power, and the transformer is a kind of electromagnetic induction principle to achieve the electrical conversion of electrical equipment, it can be a voltage, current AC power into the same frequency of another voltage, current Of AC power. Simply put, the inverter is an electronic device that converts low voltage (12 or 24 volts) of DC into 220 volts. Because we are usually 220 volts AC rectifier into DC to use, and the role of the inverter in contrast, hence the name. We are in a "mobile" era, mobile office, mobile communications, mobile leisure and entertainment. In the mobile state, people not only need to be supplied by the battery or battery low-voltage direct current, but also need our daily environment indispensable 220 volts AC, the inverter can meet our needs. Transformer is a kind of application of electromagnetic induction principle to achieve electrical energy conversion equipment, it can put a voltage, current AC power into the same frequency of another voltage, current AC power. The role of the transformer is to change the voltage. Can be issued by the power station to rise to high voltage, in order to reduce the loss in the transmission, to facilitate long-distance transmission of electricity, you can also place the electricity, the high voltage will be reduced to the voltage, to the user. Therefore, the transformer in the grid is in a very important position, is to ensure safe, reliable, economic operation and people's production and life of the key equipment.
Q:How do you choose the public transformer capacity?
800X8 = 6400KW 6400KWX0.5 (use factor) = 3200KW + 50KW mall = 32500KW (full load operation) Choose three sets of 1000KVA transformer ,, 3000 (KVA) X0.9 (functional factors) = 2700KW · · · · · · · · · · · · · · · · · · · · · · · · · 315KVA transformer for 670 is too small ,,, 670X8 = 5360KW, 5360X0.5 = 2680KW 2680KW / 0.9 = 2977KVA Choose three sets of 1000 phase change
Q:220 kv transformer capacity range,
GB GB / T6451 made a detailed provision, the latest version of the 2008 revision. (Boost, buck), three laps without load (boost, buck), autotransformed (boost, buck), the two-lane, There are several types of auto-load (boost, buck) and so on, there are about 31.5,40,50,63,90,120,150,180,240,370,400 MVA several grades, but corresponding to different types of transformers, Capacity level is slightly different, do not know what type of capacity you ask the range?
Q:Why 21 lighting transformers must use double-winding safety isolating transformers,
Double-winding type safety isolation transformer load side and the power supply side is not electrically connected, is safe, and autotransformer primary shared a winding, it has a direct electrical connection with the power supply, unsafe.
Q:What is the principle of the conversion of the transformer? How to restore the secondary side to the primary side?
Understand P1 = P2 (no loss here). To know the return of the.
Q:Will the 250KVA, 500KVA, 630KVA Van transformer size,
Box transformer inside the configuration is not the same, the size will be different, which factory production size is not the same
Q:What is the main purpose of the transformer?
Transformer is an electrical equipment for electrical energy conversion, it can be a voltage, current AC power into the same frequency of another voltage, current AC power. Transformers are used in almost all electronic products, and the principle is simple but different depending on the use of different occasions (different purposes) transformer winding process will be different requirements. Transformer functions are: voltage conversion; impedance conversion; isolation; regulator (magnetic saturation transformer), the transformer commonly used core shape generally E-and C-type core. First, the basic principles of the transformer

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