Products Description
This product series represents a customized, highly adaptable two-winding step-up transformer specifically designed for new energy generation-side applications such as photovoltaic (PV), wind power, and energy storage systems. Optimized for the wide output voltage range and high variability characteristic of new energy power plants, it serves as a core component for the efficient and reliable grid integration of renewable energy into 35kV networks.
Technical Specifications
|
Rated capacity |
Rated voltage and tapping range |
Vector group |
No Load Current |
Short-circuit impedance |
No load Losses |
On load Losses |
||
|
HV |
Tapping range |
LV |
||||||
|
1000 |
35 |
±2×2 |
0.4~1.14 |
Yd11 |
0.52 |
6.0~14.0 |
0.6 |
10.4 |
|
1250 |
0.44 |
0.8 |
12.5 |
|||||
|
1600 |
0.36 |
0.9 |
14.9 |
|||||
|
2000 |
0.36 |
1.2 |
16.5 |
|||||
|
2500 |
0.36 |
1.4 |
17.6 |
|||||
|
3000 |
0.36 |
1.6 |
20.3 |
|||||
|
3150 |
0.36 |
1.7 |
20.7 |
|||||
|
4000 |
0.36 |
2 |
24.6 |
|||||
|
4500 |
0.36 |
2.2 |
27.1 |
|||||
|
5000 |
0.36 |
2.4 |
28.2 |
|||||
|
5500 |
0.36 |
2.6 |
30.3 |
|||||
|
6300 |
0.36 |
2.9 |
31.5 |
|||||
|
8000 |
±2×2.5 |
YNd11 |
0.28 |
4 |
34.6 |
|||
|
10000 |
0.28 |
4.8 |
40.8 |
|||||
|
12500 |
0.24 |
5.6 |
50.7 |
|||||
Advantages
1. Optimized for New Energy Applications:
-Comprehensively compatible with the wide output voltage characteristics of new energy sources, including PV inverters, wind turbines, and energy storage systems, particularly suitable for various generation units with low-voltage side voltages ranging from 0.4kV to 1.14kV.
-The high-voltage side covers grid-connection voltages from 35kV to 38.5kV and offers ±2×2.5% or ±5% off-circuit tap-changing capability to meet the voltage adaptation requirements of different grid connection points.
2. Flexible Electrical Parameter Configuration:
-Short-circuit impedance is designed with a wide adjustable range (6.0% to 14.0%), allowing for customized settings based on the specific system short-circuit capacity requirements and grid codes of individual new energy projects, optimizing system matching and protection performance.
-Employs either Yd11 (for smaller capacities) or YNd11 (for medium capacities) vector groups depending on the capacity, meeting different system grounding methods and protection requirements.
3. High Energy Efficiency and Economy:
-Capacity range spans from 1 MVA to 12.5 MVA, precisely matching the unit or combined capacity of distributed and centralized new energy power plants.
-The no-load current is as low as 0.24%, with both no-load and load losses optimized to meet the core demands of new energy projects for high operational efficiency and low losses, enhancing lifecycle economy.
4. High Reliability and Environmental Adaptability:
-The off-circuit tap-changing structure is simple and reliable, with low maintenance requirements, making it suitable for new energy power plants operating in varied natural environments.
-The proven oil-immersed insulation design provides excellent heat dissipation and overload capability, ensuring long-term stable operation.
Applications
-35kV pad-mounted or platform step-up transformers for centralized and distributed photovoltaic power plants.
-35kV unit step-up transformers for wind turbines (particularly medium and low-voltage turbines).
-35kV step-up and grid-connection units for electrochemical energy storage power plants.
-Other new energy application scenarios requiring the aggregation of low-voltage generation units for connection to 35kV grids.
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