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Power Transformer

230kv Oil-immersed Power Transformer

  • Brand: HENGFENGYOU
  • Series: SSZ
  • USES: Power Transformer
  • Country of origin: China
  • Terms of payment: L/C, T/T, Western Union, Paypal, Money Gram
  • Certification: ISO9001、CB

230kv Power Transformer Overview


● scientific calculation means: use advanced electrical, magnetic, thermal and mechanical force calculation software to calculate the distribution of electromagnetic field and magnetic leakage, conduct wave process analysis, and select reliable insulation margin to ensure reliable product performance.
 
● reasonable structural layout: the iron core adopts multi-stage step lap full tilt structure to reduce no-load loss and noise; The iron core is supported by a round rod, and the coil adopts a hard paper cylinder to enhance the short-circuit resistance; The coil adopts baffle to guide and circulate the oil flow and reduce the coil temperature rise; Special shaped fins are used to raise the fin heat dissipation center to reduce the temperature rise of the oil surface: all internal insulating parts and metal structural parts are rounded to reduce partial discharge.
 
● advanced process measures: the iron core is automatically cut, with high precision and small burr. The process of not stacking iron rollers is adopted, and the surface is coated with double h curing adhesive and bound; Vertical winding of coil, with numerical control tensioning device; The body adopts the phase suit process, and the lead wire adopts the overall preassembly; The body adopts the fully automatic kerosene gas-phase drying process.
 
● perfect quality assurance system: control product quality in strict accordance with ISO19001 quality system.
 
● ssz11-240000/230 transformer has passed the national full set type test and sudden short circuit test.
 
● products of other voltage combinations, loss values, connection groups and capacities listed in the table can be provided according to user needs.

230kv power transformer manufacturer
200MVA-230kv Power Transformer

230kv Power Transformer Advantage


1. Standards: GB, IEC, GOST, EN, NF, ANSI/IEEE (customizable according to customer standards)
2. Certification: ISO、CE、IEC、SABS、COC、CSA、UL
3. Efficiency: The efficiency of a 132kV transformer can exceed 98%, meeting energy efficiency regulations in all countries worldwide.
4. Successful case verification: Accumulated a large amount of 230kV project experience in global power grid transformation, new energy access (such as photovoltaic booster stations) and other fields, verified the stability of products under complex working conditions, and designed a lifespan of over 30 years.
5. Environmental Protection and Sustainable Development: Adopting FR3 environmentally friendly insulation oil and recyclable materials to reduce carbon footprint, in line with the "dual carbon" policy orientation.
6. Delivery capability: Normal 90 days; The shortest delivery cycle is 50 days.

230kv Power Transformer Type

For HENGFENGYOU ELECTRIC, a 230kV transformer can be a three-phase double winding transformer, a three-phase three winding transformer, or an autotransformer transformer. These types of transformers have the same principle, but their structures are different, and different types of transformers have different applications. HENGFENGYOU ELECTRIC provides you with the most ideal solution.
230kV three-phase double winding transformer
230kV three-phase three winding transformer
230kV autotransformer transformer

Get 230kv Power Transformer Price
 
 

230kv Power Transformer Technical Parameter


230kV double winding non excitation voltage regulating power transformer
额定容量
Rated capacity
(kva)
电压组合及分接范围
Voltage ratio and tap range
(kv)
联结组
Connection symbol
空载损耗
No-load loss
(kw)
负载损耗
Full-load loss
(kw)
短路抗阻
Impedance(%)
空载电流
No-load current
(%)
高压
HV
低压
LV
31500 220
242±2×2.5%
6.3
6.6
10.5
11
YNd11 35 135 12-14 0.70 
40000 41 157 0.70 
50000 49 189 0.65 
63000 58 220 0.65 
75000 10.5
11
13.8
67 250 0.60 
90000 77 288 0.55 
120000 94 345 0.55 
150000 11;13.8;
15.75;20
112 405 0.50 
180000 128 459 0.46 
240000 160 567 0.42 
300000 15.75;
18;20
189 675 0.38 
360000 217 774 0.38 



 

Low voltage 66kV level 230kV double winding non excitation voltage regulating power transformer
额定容量
Rated capacity
(kva)
电压组合及分接范围
Voltage ratio and tap range
(kv)
联结组
Connection symbol
空载损耗
No-load loss
(kw)
负载损耗
Full-load loss
(kw)
短路抗阻
Impedance(%)
空载电流
No-load current
(%)
高压
HV
低压
LV
31500 220
242±2×2.5%
63
66
69
YNd11 38 151 12-14 0.89 
40000 45 176 0.89 
50000 53 211 0.82 
63000 63 247 0.82 
90000 83 323 0.75 
120000 102 387 0.75 
150000 122 453 0.68 
180000 138 513 0.68 
240000 171 635 0.61 



 


230kV dual winding on load voltage regulating power transformer
额定容量
Rated capacity
(kva)
电压组合及分接范围
Voltage ratio and tap range
(kv)
联结组
Connection symbol
空载损耗
No-load loss
(kw)
负载损耗
Full-load loss
(kw)
短路抗阻
Impedance(%)
空载电流
No-load current
(%)
高压
HV
低压
LV
31500 220
242±2×2.5%
66.3;6.6
10.5;11
35;37;38.5
YNd11 38 135 12-14 0.70 
40000 45 157 0.63 
50000 54 189 0.56 
63000 63 220 0.56 
90000 10.5;11
35;37;38.5
80 288 0.49 
120000 99 346 0.49 
150000 116 405 0.42 
180000 135 468 0.42 
120000 66
69
102 355 0.49 
150000 120 415 0.42 
180000 140 475 0.42 



 

230kV Three winding Unexcited Voltage Regulating Power Transformer
额定容量
Rated capacity
(kva)
电压组合及分接范围
Voltage ratio and tap range(kv)
联结组
Connection symbol
空载损耗
No-load loss
(kw)
负载损耗
Full-load loss
(kw)
短路抗阻
Impedance(%)
空载电流
No-load current
(%)
高压
HV
中压
MV
低压
LV
升压变
step-up
降压变
step-down
31500 220
242±2×2.5%
69
115
121
6.3
6.6 10.5
11
35 37
38.5
YNyn0d11 40 162 高-中
H-M
22-24
高-低
H-L
12-14
中-低
M-L
7-9
高-中
H-M
22-24
高-低
H-L
12-14
中-低
M-L
7-9
0.70 
40000 48 189 0.63 
50000 56 225 0.56 
63000 66 261 0.56 
90000 10.5 11
13.8 35
37 38.5
86 351 0.49 
120000 106 432 0.49 
150000 11 13.8
15.75
35 37
38.5
125 513 0.42 
180000 142 585 0.42 
240000 176 720 0.35 
300000 208 750 0.30 




230kV three winding non excitation voltage regulating autotransformer
额定容量
Rated capacity
(kva)
电压组合及分接范围
Voltage ratio and tap range(kv)
联结组
Connection symbol
空载损耗
No-load loss(kw)
负载损耗
Full-load loss(kw)
短路抗阻
Impedance(%)
空载电流
No-load current
(%)
高压
HV
中压
MV
低压
LV
升压
step-up
降压
step-down
升压
step-up
降压
step-down
升压变
step-up
降压变
step-down
31500 220
242±2×2.5%
115
121
6.6 10.5
11
35 37
38.5
YNyn0d11 25 22 117 99 高-中
H-M
12-14
高-低
H-L
8-12
中-低
M-L
14-18
高-中
H-M
8-12
高-低
H-L
28-34
中-低
M-L
18-24
0.50 
40000 29 26 144 121 0.50 
50000 34 30 170 144 0.43 
63000 40 36 201 171 0.43 
90000 50 46 276 234 0.36 
120000 10.5
11 13.8 15.75
18 35 37
38.5
62 56 340 288 0.36 
150000 70 60 405 342 0.33 
180000 80 72 464 387 0.33 
240000 95 86 595 504 0.25 




230kV three winding on load voltage regulating power transformer
额定容量
Rated capacity
(kva)
电压组合及分接范围
Voltage ratio and tap range(kv)
联结组
Connection symbol
空载损耗
No-load loss
(kw)
负载损耗
Full-load loss
(kw)
短路抗阻
Impedance(%)
空载电流
No-load current
(%)
高压
HV
中压
MV
低压
LV
31500 220
242±2×2.5%
69
115
121
6.3
6.6 10.5
11
35 37
38.5
YNyn0d11 44 162 高-中
H-M
22-24
高-低
H-L
12-14
中-低
M-L
7-9
0.77 
40000 50 189 0.70 
50000 60 225 0.63 
63000 70 261 0.63 
90000 10.5 11
35
37 38.5
92 351 0.56 
120000 115 432 0.56 
150000 135 513 0.49 
180000 159 630 0.49 
240000 193 780 0.45 


 
230kv Power Transformer Shipment



 

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230kv Power Transformer FAQ


What is a 230kV power main transformer?
Answer: The 230kV main transformer is a high-voltage power equipment with a rated voltage of 230kV and a capacity of usually 100-400MVA. It is used for voltage conversion in ultra-high voltage power grids (such as 500kV → 230kV → 110kV) and is the core hub equipment of backbone power grids. The core structure includes high-voltage windings, iron cores, cooling systems, and composite insulation sleeves.
 
What are the main application scenarios of 230kV transformers?
Answer:
*Ultra high voltage transmission network: connects the 500kV ultra-high voltage power grid with the 230kV regional power grid.
*Power plant booster station: Boosting the outlet voltage (such as 24kV) of large thermal/hydroelectric power units to 230kV.
*Hub Substation: Achieve 230kV → 132kV/33kV multi-stage voltage reduction to supply power to cities or industrial areas.
 
What is the capacity range of a 230kV transformer?
Answer:
*Conventional capacity: 50-200MVA (regional power grid).
*Large capacity customization: 200-400MVA (such as nuclear power, ultra-high voltage supporting substations).
 
What is the difference between a three winding transformer and an autotransformer?
Type three winding transformer autotransformer
Structure independent high voltage, medium voltage, and low voltage windings. High voltage and medium voltage shared windings (small size, high efficiency)
Application of multi voltage level interconnection (such as 230/132/33kV) for similar voltage conversion (such as 230kV/132kV)
High cost (multiple independent insulation groups) and low cost (material savings of 20% -30%)
How to choose the cooling method for 230kV transformers?
Answer:
*OFAF (forced oil circulation air cooling): below 200MVA, with balanced heat dissipation and controllable cost.
*ODAF (forced oil circulation guided air cooling): 200-500MVA, precise heat dissipation, suitable for high load scenarios.
*OFWF (forced oil circulation water cooling): requires a matching water cooling system, suitable for high temperature or closed environments.
 
6. Selection suggestions for 230kV transformer tap changer (MR, ABB, domestic)
Brand advantages applicable scenarios
MR (Germany) is a leading technology in the field of ultra-high voltage, with a mechanical lifespan of over 1 million times in harsh scenarios such as nuclear power and ultra-high voltage
ABB (Switzerland) intelligent control, supporting remote monitoring and diagnosis of intelligent substations that require integrated automation systems
China (such as Huaming) has high cost-effectiveness and fast response to localized services for conventional power grids or budget constrained projects
7. Delivery cycle and key influencing factors of 230kV transformer?
*Standard cycle: 4 months (including design, material procurement, production, and type testing).
*Urgent delivery: can be compressed to 2 months (at an additional cost).
*Delay factors:
*The supply cycle of imported high-voltage bushings (such as ABB) is long.
*Complex tests (lightning impulse, temperature rise test, partial discharge test).
 
8. Design life and measures to extend the life of 230kV transformers
*Theoretical lifespan: 30-40 years (IEC 60076 standard).
*Methods for extending lifespan:
*Control the load rate to ≤ 90% to avoid long-term overload.
*Adopt online monitoring (DGA, temperature, partial discharge).
*Regularly replace the insulation oil (acid value ≤ 0.1mg KOH/g).
 
What content does the warranty clause for 230kV transformers cover?
*Warranty period: usually 2-5 years (Hengfengyou can extend it to 5 years).
*Coverage Area:
*Manufacturing defects such as winding deformation, iron core failure, and sleeve rupture.
*Mechanical failure of the tap changer (such as worn contacts).
*Excluding: lightning strikes, overvoltage during operation, and human maintenance errors.
 
10. Key considerations in the operation and maintenance of 230kV transformers
*Monthly inspection: oil level, oil temperature, and cooling system operation status.
*Annual testing: Insulation oil chromatographic analysis (to determine internal discharge or overheating).
*Check every 5 years: winding DC resistance test, iron core insulation resistance test.
 

 



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