intelligent EHV (Extra High-Voltage) power transformer 330kV 345kV 363kV
Key attributes
| Brand | Vziman |
| Model NO. | intelligent EHV (Extra High-Voltage) power transformer 330kV 345kV 363kV |
| Rated voltage | 330kV |
| Rated frequency | 50/60Hz |
| Rated capacity | 15000KVA |
| Series | S |
Product descriptions from the supplier
Description
EHV power transformer Description
This 330kV-class EHV power transformer has achieved in-depth innovations in materials, processes and structure, realizing a performance leap of "compactness + high efficiency + high reliability" for the Extra High-Voltage power transformer. As a high-performance power equipment for ultra-high voltage transmission, the EHV power transformer can drastically reduce power grid transmission losses and long-term O&M costs, with outstanding economic and engineering practical value. It is widely applicable to core EHV power transmission and distribution scenarios such as power plants, hub substations and large industrial and mining enterprises that demand high-quality Extra High-Voltage power transformer equipment.
EHV power transformer Core Features
- Lightweight & Compact：This EHV power transformer adopts high-strength lightweight insulating materials and a modular structural design; compared with traditional models of the same voltage class, its volume is reduced by 18% and weight by 12%. The optimized structure of the Extra High-Voltage power transformer greatly saves substation installation space while ensuring stable and safe long-term operation of the equipment.
- High Efficiency & Low Loss：Equipped with low-loss silicon steel cores and an optimized winding process, the 330kV-class EHV power transformer achieves an operating efficiency of over 99.3%, cutting annual power grid losses by 12%-18%. This energy-saving advantage is a core performance highlight of the high-performance Extra High-Voltage power transformer, bringing significant long-term energy-saving benefits for power grid operation.
- Low Noise & High Reliability：Through magnetic circuit optimization and a vibration-damping, noise-reduction structural design, the operating noise of the EHV power transformer is controlled below 60dB. Core components of the Extra High-Voltage power transformer have passed more than 20,000 hours of durability testing, extending the fault-free operation cycle by 25% and fully embodying the high reliability of the 330kV-class ultra-high voltage equipment.
- Economical & Versatile：The long-term O&M costs of this 330kV-class EHV power transformer are reduced by about 22%, with strong compatibility for multi-scenario EHV transmission and distribution needs. The Extra High-Voltage power transformer serves as a cost-effective core power equipment, perfectly matching the ultra-high voltage power supply demands of large-scale energy bases and industrial projects.
EHV power transformer Technical Parameters
90000kVA-720000kVA off-circuit tap-changing EHV (Extra-High Voltage) power transformer
|
Rated Capacity (kVA)
|
Voltage Combination and Tap Range
|
Connection Group Symbol
|
No - load Loss (kW) (9)
|
Load Loss (kW) (9)
|
No - load Current %
|
Short - circuit Impedance %
|
|
|---|---|---|---|---|---|---|---|
|
High Voltage kV
|
Low Voltage kV
|
||||||
|
90000
|
345
345±2×2.5%
363
363±2×2.5%
|
10.50
13.80
15.75
18.00
20.00
|
YNd11
|
68.0
|
274
|
0.44
|
14 - 15
|
|
120000
|
85.0
|
340
|
0.44
|
||||
|
150000
|
101
|
402
|
0.41
|
||||
|
180000
|
116
|
461
|
0.38
|
||||
|
240000
|
145
|
572
|
0.34
|
||||
|
360000
|
198
|
802
|
0.34
|
||||
|
370000
|
202
|
818
|
0.30
|
||||
|
400000
|
214
|
867
|
0.30
|
||||
|
720000
|
332
|
1347
|
0.20
|
||||
Note 1: According to user requirements, any voltage in the table can be selected for the low voltage.
Note 2: The non-tap structure can be optionally adopted; if required for operation, taps can be set.
90000kVA-240000kVA off-circuit tap-changing EHV (Extra-High Voltage) power transformer
|
Rated Capacity (kVA)
|
Voltage Combination & Tapping Range
|
Connection Symbol
|
No-load Loss (kW)
|
Load Loss (kW)
|
No-load Current (%)
|
Short-circuit Impedance (%)
|
Capacity Allocation %
|
||
|---|---|---|---|---|---|---|---|---|---|
|
High Voltage (kV)
|
Medium Voltage (kV)
|
Low Voltage (kV)
|
|||||||
|
90000
|
330±2×2.5%
345±2×2.5%
|
121
|
10.5
13.8
15.75
|
YNyn
0d11
|
77.0
|
335
|
0.46
|
High-Medium: 24~26
High-Low: 14~15
Medium-Low: 8~9
|
100/100/100
|
|
120000
|
96.0
|
415
|
0.46
|
||||||
|
150000
|
114
|
491
|
0.43
|
||||||
|
180000
|
130
|
463
|
0.43
|
||||||
|
240000
|
162
|
699
|
0.40
|
||||||
- Note 1: The data listed in the table applies to the structure of step-up products.
- Note 2: The capacity distribution of the step-up structure can also be (100/50/100)%.
- Note 3: Step-down structure products can be provided upon request, with short-circuit impedance: 24%-26% (high to low); 14%-15% (high to medium); 8%-9% (medium to low). Its capacity distribution can be (100/100/50)% or (100/50/100)%.
- Note 4: The short-circuit impedance in the table is the value at 100% rated capacity.
- Note 5: The non-tap structure is preferred. If required for operation, taps can be set.
90000kVA-360000kVA off-circuit tap-changing auto-EHV transformer
|
Rated Capacity (kVA)
|
Voltage Combination and Tap Range
|
Connection Group Symbol
|
No - load Loss (kW)(9)
|
Load Loss (kW)(9)
|
No - load Current (%)
|
Short - circuit Impedance%
|
Capacity Allocation%
|
||
|---|---|---|---|---|---|---|---|---|---|
|
High Voltage kV
|
Middle Voltage kV
|
Low Voltage kV
|
|||||||
|
90000
|
330±2×2.5%
|
121
|
10.5
11
35
38.5
|
YNa0d11
|
45.0
|
263
|
0.36
|
24 - 26
10 - 11
12 - 14
|
100/100/30
|
|
120000
|
56.0
|
324
|
0.36
|
||||||
|
150000
|
68.0
|
385
|
0.32
|
||||||
|
180000
|
77.0
|
440
|
0.32
|
||||||
|
240000
|
96.0
|
547
|
0.28
|
||||||
Note 1: The data listed in the table applies to the structure of step-down products.
Note 2: Step-up structure products can be provided upon request, with short-circuit impedance: 10%-11% (high to low); 24%-26% (high to medium); 12%-14% (medium to low).
Note 3: The short-circuit impedance in the table is the value at 100% rated capacity.
Note 4: The non-tap structure is preferred. If required for operation, taps can be set.
Note 5: When the annual average load of the transformer is around 40%, the highest operating efficiency can be achieved using the losses listed in the table.
EHV power transformer Core Application Scenarios:
- Large-Scale New Energy Power Transmission：Applied in the transmission systems connecting wind-solar hybrid bases, pumped storage power stations, large hydropower stations to the main grid, the EHV power transformer boosts the low-voltage electricity generated by new energy sources to the ultra-high voltage level, realizing long-distance, low-loss grid connection. The Extra High-Voltage power transformer ensures efficient utilization of clean energy, matching the large-scale power transmission needs of new energy bases.
- Regional Power Grid Interconnection：Deployed in inter-provincial and inter-regional hub substations, the EHV power transformer undertakes the core tasks of voltage transformation and power regulation between different regional power grids. The Extra High-Voltage power transformer effectively promotes the optimal allocation of cross-regional power resources, and significantly enhances the stability and reliability of the overall power grid operation.
- Key Industrial Power Supply：Used in the core power supply systems of large industrial and mining enterprises (non-ferrous metal smelters, large chemical plants) and high-tech industrial clusters, the EHV power transformer provides stable, high-quality ultra-high voltage power support for high-power production equipment and precision instruments. The Extra High-Voltage power transformer fully meets the strict requirements of industrial production for power continuity and power quality.
EHV power transformer Operating Conditions:
- Ambient Temperature：The EHV power transformer is suitable for operation in an environment with a temperature range of -25℃ to +40℃, with the maximum monthly average temperature not exceeding 30℃ and the minimum monthly average temperature not lower than -15℃. Extreme temperature conditions beyond this range will cause performance degradation of the Extra High-Voltage power transformer, which shall be strictly avoided.
- Altitude Requirement：The EHV power transformer is applicable for use at altitudes not exceeding 1000 meters above sea level. For application at altitudes above 1000 meters, derating treatment must be carried out in accordance with relevant technical standards to ensure the safe and stable operation of the Extra High-Voltage power transformer.
- Power Grid Parameters：Adapted to three-phase AC power grids with a rated frequency of 50Hz, the input end voltage fluctuation range of the EHV power transformer shall not exceed ±10% of the rated voltage, and the grid harmonic content must comply with national standard requirements to prevent damage to internal components of the Extra High-Voltage power transformer.
- Installation Environment：The EHV power transformer should be installed in a well-ventilated, dry, dust-free indoor substation or outdoor enclosed power distribution device area. It is necessary to avoid direct sunlight, heavy rain soaking, and erosion by corrosive gases and conductive dust, which is the key to ensuring the long service life of the Extra High-Voltage power transformer.
Documentation Resource Library
FAQ
Restricted.
Globalized Extra HV Distribution Transformer selection catalog
Catalogue
English
Consulting
Q: What is an EHV Transformer ?
A:
AnEHV Transformer is a special type of transformer designed to transfer electricity at very high voltages, such as 330kV, 345kV, or 363kV. These transformers help in transmitting large amounts of electricity over long distances with minimal power loss, which is important for our electricity supply.
Q:How do EHV Transformer reduce power loss?
A:EHV Transformer are designed with low-loss materials and smart engineering that enhance their efficiency. This allows them to operate with over 99.3% efficiency and can cut down energy losses by 12 to 18% each year, helping save electricity and reduce costs.
Q:What are the main uses of EHV Transformer?
A:EHV Transformer are mainly used in power plants, substations, and large companies that need to distribute electricity. They help in ensuring that electricity is fed reliably into the power grid, providing energy to homes, schools, and businesses.
Q:Can EHV Transformer be customized?
A:Yes! EHV Transformer can be customized for specific needs. Depending on a company's requirements, adjustments can be made to the voltage levels, capacity, and even the design to fit particular power grid circumstances.
