400kV Three Phase Outdoor Oil Immersed Distribution Transformer: A High Performance Power Solution
The 400kV three - phase outdoor - type oil - immersed distribution transformer is a pinnacle of power distribution technology. Engineered to meet the most demanding power transfer requirements, it is specifically designed for large - scale outdoor power distribution scenarios, ensuring the seamless flow of electricity across extensive networks.
I. Robust Structure and Advanced Design
Tank
- Constructed from extra - thick, high - strength alloy steel plates, the transformer's tank offers unparalleled mechanical strength. Its hermetic sealing technology effectively keeps out wind - driven debris, rain, and moisture, creating a protected environment for the internal components.
- The tank surface is treated with multiple layers of advanced anti - corrosion coatings. These coatings not only shield against rust and chemical erosion but also enhance the tank's durability, ensuring a long - lasting service life even in the harshest outdoor conditions.
Core
- Composed of ultra - high - permeability, premium - grade silicon steel sheets, the core is optimized to minimize both hysteresis and eddy - current losses. This results in significantly improved energy efficiency and reduced power consumption.
- A state - of - the - art fully - inclined joint structure is employed in the core design. This innovation not only reduces core vibration to an absolute minimum but also mitigates noise emissions, making it suitable for installations near residential areas or noise - sensitive environments.
Windings
- Wound with high - purity, high - conductivity copper wires of large cross - sectional area, the windings are engineered to handle the high - voltage and high - current demands of a 400kV system. The copper wires provide excellent electrical conductivity and mechanical strength, ensuring reliable power transfer.
- The winding design is highly customized to meet the specific voltage transformation ratios and capacity requirements of different power distribution applications. Advanced insulating materials, such as high - temperature - resistant and moisture - proof polymers, are used to provide superior electrical insulation and efficient heat dissipation.
II. Exceptional Performance Attributes
High - Efficiency and Energy Conservation
- Through a combination of innovative design concepts and the use of top - tier materials, this 400kV transformer achieves extremely low no - load and load losses. It far exceeds industry - standard efficiency levels, leading to substantial energy savings and reduced operating costs for power grid operators.
Robust Overload Capability
- Equipped with advanced thermal management and power - handling systems, the transformer can safely handle significant short - term overloads. This enables it to meet sudden spikes in power demand, ensuring uninterrupted power supply to critical industrial, commercial, and utility customers.
Superior Heat Dissipation
- The oil - immersed design, combined with a large - capacity cooling system, ensures efficient heat transfer from the core and windings to the tank surface. Specialized heat - dissipation fins, with an optimized surface area and shape, are attached to the tank. These fins, along with natural air circulation or optional forced - air cooling systems, enhance heat dissipation efficiency, maintaining the transformer's operating temperature within the optimal range.
Stable and Reliable Operation
- Stringent factory testing procedures, including high - voltage withstand tests, partial discharge tests, and thermal stability tests, are carried out on each transformer. Additionally, real - time monitoring and diagnostic systems can be integrated to continuously assess the transformer's performance. This comprehensive quality control approach ensures stable and reliable operation under a wide range of environmental and electrical conditions.
III. Comprehensive Technical Specifications
Rated Capacity
- Available in a wide range of capacities, typically from 10MVA to 100MVA, to meet the diverse power requirements of large - scale power distribution systems.
Rated Voltage
- High - Voltage Side: 400kV
- Low - Voltage Side: Customizable, with common options including 110kV, 220kV, depending on the specific power grid configuration.
Frequency
- Standard frequency of 50Hz or 60Hz, with the flexibility to be customized according to regional power grid requirements.
Cooling Method
- Primarily uses the ONAN (Oil Natural Air Natural) cooling method for normal operating conditions. For high - load or extreme - temperature applications, an optional ONAF (Oil Natural Air Forced) cooling system can be installed to enhance cooling performance.
Insulation Level
- High - voltage: LI 1425 AC 650 kV
- Low - voltage: Insulation levels are adjusted according to the specific low - voltage rating, with appropriate lightning impulse (LI) and power frequency withstand (AC) values.
Temperature Rise
- Under full - load conditions, the winding temperature rise is carefully controlled to within 65°C, while the oil temperature rise is limited to 55°C. This ensures the long - term integrity of the insulation materials and the reliable operation of the transformer.
Efficiency
- Achieves an impressive efficiency of over 99% under typical load conditions, highlighting its energy - saving capabilities and contribution to sustainable power distribution.
Standards Compliance
- Strictly complies with international standards such as IEC 60076 series, IEEE C57 standards, and other relevant national and international regulations, ensuring the highest quality and safety levels.
IV. Diverse Applications
Utility Power Grids
- Forms a crucial part of high - voltage transmission and distribution networks, facilitating the efficient transfer of electricity from power generation sources to large - scale industrial, commercial, and residential consumers.
Industrial Parks
- Ideal for powering large - scale industrial complexes, such as steel mills, petrochemical plants, and automotive manufacturing facilities, where a stable and high - capacity power supply is essential for continuous operation.
Renewable Energy Integration
- Plays a vital role in integrating large - scale renewable energy sources, such as wind farms and solar power plants, into the main power grid. It helps in stepping up the voltage of the generated electricity for efficient transmission over long distances.
V. Distinctive Advantages
Durability
- Built to withstand extreme weather conditions, including high winds, heavy rain, and temperature variations, the transformer is designed for decades of reliable operation with minimal maintenance.
Customizability
- Offers a high degree of customization in terms of capacity, voltage ratios, and cooling options, allowing power grid operators to tailor the transformer to their specific network requirements.
Energy Efficiency
- Significantly reduces energy losses during power transmission and distribution, contributing to a more sustainable and cost - effective power supply system.
Low Maintenance
- The robust design and high - quality materials used in its construction result in a long service life with minimal maintenance requirements. Condition - based monitoring systems can be installed to predict potential issues and schedule maintenance proactively.
Global Standards Adherence
- Complies with the most stringent international safety and performance standards, making it a trusted choice for power grid projects around the world.
Rated
Capacity
(KVA) |
Voltage Combination |
Vector
Group |
No-load
Loss(KW) |
Load
Loss
(KW) |
No-load
Current
% |
Short-circuit
Impedance |
Weight (KG) |
High Voltage
(KA) |
High Voltage Tapping Range |
Low Voltage
(KA) |
Oil Weight |
Gross Weight |
| 30 |
20-10 |
±5x2.5%
±2x2.5% |
0.4 |
Dyn11 |
0.09 |
0.66 |
2.1 |
5.5 |
180 |
420 |
| 50 |
0.13 |
0.96 |
2 |
150 |
495 |
| 63 |
0.15 |
1.145 |
1.9 |
170 |
560 |
| 80 |
0.18 |
1.37 |
1.8 |
190 |
635 |
| 100 |
0.20 |
1.65 |
1.6 |
215 |
710 |
| 125 |
0.24 |
1.98 |
1.5 |
250 |
840 |
| 160 |
0.29 |
2.42 |
1.4 |
285 |
945 |
| 200 |
0.33 |
2.86 |
1.3 |
340 |
1125 |
| 250 |
0.40 |
3.35 |
1.2 |
390 |
1295 |
| 400 |
0.57 |
4.01 |
1.1 |
445 |
1475 |
| 500 |
0.57 |
4.73 |
1.0 |
6.0 |
515 |
1712 |
| 630 |
0.68 |
5.66 |
1.0 |
460 |
1995 |
| 800 |
0.81 |
6.82 |
0.9 |
565 |
2450 |
| 1000 |
0.98 |
8.25 |
0.8 |
635 |
2765 |
| 1250 |
1.15 |
11.33 |
0.7 |
840 |
3650 |
| 1600 |
1.35 |
13.20 |
0.7 |
970 |
4220 |
| 2000 |
1.63 |
15.95 |
0.6 |
1105 |
4800 |
| 2500 |
1.95 |
19.14 |
0.6 |
1205 |
5240 |
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