220kV class three-phase on-load

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220kV THREE-PHASE ON-LOAD VOLTAGE REGULATING

TRANSFORMER

Summary

220kV three-phase oil immersed on-load voltage regulating transformer brings about a series of major transformations in terms of material, technique, and construction. It is characteristic of compact construction,
low weight, high efficiency, low loss, low noise, and reliability of performance. The product can reduce considerable losses on grid and operational costs and extend distinct economic efficacy.
The product meets following national standards: GB1094.1-2013 Power transformers Part 1: General; GB1094.2-2013
Power transformers Part 2: Temperature rise; GB1094.3-2003 Power transformers Part 3: Insulation levels, dielectric tests and external clearances in air; GB1094.5-2003 Power transformers Part 5: Ability to withstand short-circuit;
GB/T6451-2015 Specification and technical requirements for three phase oil immerse power transformers.

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Main 220kV level three-phase on-load voltage regulating power transformer technical parameters
Rated
Capacity
(kVA)
Voltage Combination Vector Gourp No-load Loss Load Loss No Load
Current
  Short Circuit
Impedance
%
HV
(kV)
LV
k(V)
kW kW %  
31500   6.3
6.6
10.5
11
YNd11 28 128 0.56   12-14
40000   32 149 0.56  
50000   39 179 0.52  
63000   46 209 0.52  
75000   10.5
13.8
53 237 0.48  
90000   64 273 0.44  
120000   75 338 0.44  
150000 220±2*2.5% 10.5,11,13.8 89 400 0.40  
160000 242±2*2.5% 15.75 93 420 0.39  
180000   18,20 102 459 0.36  
240000     128 538 0.33  
300000   13.8
15.75
18
21
154 641 0.30  
360000   17 735 0.30  
370000   176 750 0.30  
400000   187 795 0.28  
420000   193 824 0.28  

Note 1Transformers with rated capacity less than 31500 kVA and other voltage combinations can also be provided as required.
Note 2 Transformers with low voltage of 35 kV or 38.5 kV can also be provided as required.
Note 3 The non-splitting structure is preferred. If there is any requirement for operation, sub-connectors can be set up.
Note 4 When the average annual load rate of transformer is between 45% and 50%, the maximum operating efficiency can be obtained by using the loss value in the table.

 

31500-300000kVA three-phase three -winding non-field excitation changing power transformer  
Rated
Capacity
(kVA)
Voltage Combination Vector Group No-load loss
kW
Load loss
kW
  No load current
%
Short-circuit impedance(%)
High Voltage
kV
Med-ium Voltage
(kV)
Low Voltage
(kV)
  Step down Step down
31500     6.3,6.6
10.5,21
36,37
38.5
  32 153.00   0.56    
40000       38 183.00   0.5    
50000       44 216.00   0.44    
63000       52 257.00   0.44 H-M H-M
90000 220±2*2.5% 69 10.5,13.8
21,36,37
38.5
YNyn0d11 68 333.00   0.39 22-24 22-24
120000 230±2*2.5% 115   84 410   0.39 H-L H-L
150000 242±2*2.5% 121   100 487   0.33 12-14 12-14
180000     10.5,13.8
15.75,21
37,38.5
  113 555   0.33 M-L M-L
240000       140 684   0.28 7-9 7-9
300000       166 807   0.24    

Note 1: The capacity allocation of load loss in the table is (100/100/100)%. The capacity allocation of boost structure can be
(100/50/100)%. The capacity allocation of Buck structure can be (100/50/100)% or(100/50/100)%.
Note 2: Transformers with rated capacity less than 31500 KA and other voltage combinations can also be provided as required.
Note 3: Transformers with low voltage of 35 kV can also be provided as required.
Note 4: Priority should be given to non-splitting structure. If the operation requires, splitting can be set.
Note 5: When the average annual load rate of transformer is between 45%, the maximum operating efficiency can be obtained by using the loss value in the table.

 

31500kVA-180000kVA three-phase duplex-winding on-load tap changing power transformer
Rated
Capacity
(kVA)
Voltage Combination Vector Gourp No-load Loss Load Loss No Load
Current
  Short Circuit
Impedance
%
 
HV
(kV)
LV
k(V)
kW kW %    
31500   6.3,6.6
10.5,11,21
36,37
38.5
  30 128 0.57   12-14  
40000     36 149 0.57    
50000     43 179 0.53    
63000     50 209 0.53    
90000     64 273 0.45    
120000 220±8*1.25% 10.5,11,21
36,37
38.5
YNd11 79 338 0.45    
150000 230±8*2.5%   92 400 0.41    
180000     108 459 0.38    
120000     81 337 0.45    
150000   66
69
  96 394 0.41    
180000     112 451 0.38    
240000     140 560 0.30    

 

31500kVA-240000kVA three-phase three-winding on-load tap changing power transformer  
Rated
Capacity
(kVA)
Voltage Combination No-load Loss Load Loss No Load
Current
Vector group Short Circuit
Impedance
%
Capacity
Assignment
HV
(kV)
Med-ium Voltage
(kV)
LV
k(V)
kW kW %
31500     6.3
6.6
10.5
11
21
33
36
37
38.5
35 153.00 0.63   H-M
12-14
H-L
22-24
M-L
7-9
100/100/100
100/50/100
100/100/50
40000     41 183.00 0.60  
50000     48 216.00 0.60  
63000   69 56 257.00 0.55  
90000 220±8*1.25% 115 10.5
11
21
33
36
37
38.5
73 333.00 0.44 YNyn0d11
120000 230±8*1.25% 121 92 410 0.44  
150000     108 487 0.39  
180000     124 598 0.39  
240000     154 741 0.35  

Note 1The data listed in the table are applicable to depressurized structural products, and boost structural products can also be provided as required.
Note 2 Transformers with low voltage of 35 kV can also be provided as required.
Note 3 When the average annual load rate of transformer is between 45% and 50%, the maximum operating efficiency can be obtained by using the loss value in the table.

 

31500kVA-240000kVA three-phase three-winding on-load  self-coupled  power transformer  
Rated
Capacity
(kVA)
Voltage Combination No-load Loss Load Loss No Load
Current
Vector group Short Circuit
Impedance
%
Capacity
Assignment
HV
(kV)
Med-ium Voltage
(kV)
LV
(kV)
kW kW %
31500     6.3
6.6
10.5
21
36
37
38.5
20.0 102 0.44 YNyn0d11 H-M
8-11
H-L
28-34
M-L
18-24
100/100/50
40000     24.0 125 0.44
50000     28.0 149 0.39
63000     33.0 179 0.39
90000 220±8*1.25% 115 40.0 234 0.33
120000 230±8*1.25% 121 10.5
21
36
37
38.5
51.0 292 0.33
150000     60.0 346 0.28
180000     68.0 398 0.28
240000     83.0 513 0.24

Note 1 The data listed in the table are applicable to depressurized structural products, and boost structural products can also be provided as required.
Note 2Transformers with low voltage of 35 kV can also be provided as required.
Note 3 When the average annual load rate of transformer is between 45% and 50%, the maximum operating efficiency can be obtained by using the loss value in the table.

 

31500kVA-240000kVA three-phase three-winding on-load  self-coupled  power transformer
Rated
Capacity
(kVA)
Voltage Combination No-load Loss Load Loss No Load
Current
Vector group Short Circuit
Impedance
%
Capacity
Assignment
HV
(kV)
Med-ium Voltage
(kV)
LV
(kV)
kW kW %
31500     6.3
6.6
10.5
21
36
37
38.5
20.0 102 0.44 YNyn0d11 H-M
8-11
H-L
28-34
M-L
18-24
100/100/50
40000     24.0 125 0.44
50000     28.0 149 0.39
63000     33.0 179 0.39
90000 220±8*1.25% 115 40.0 234 0.33
120000 230±8*1.25% 121 10.5
21
36
37
38.5
51.0 292 0.33
150000     60.0 346 0.28
180000     68.0 398 0.28
240000     83.0 513 0.24

1.Products exclusive in the product list may also be provided upon user requirements.Performance of the products will be customized.
2.Medium voltage device could select voltage value or tap other than those specified in the table upon user requirement.High voltage tapping may choose asymmetrical regulating tapping.
3.Short circuit impedance may choose value other than those defined in the table.
4.Final size is based on drawings of signed contract.

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