Core Positioning:
This product series is an intelligent voltage-regulating two-winding main power transformer designed for 110kV grid users and nodes with high requirements for voltage stability and power quality. It integrates proven transformer technology with online on-load tap-changing (OLTC) functionality, providing an ideal solution for dynamic voltage optimization and ensuring continuous, high-quality power supply to critical loads.
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 |
||||||
|
6300 |
110 |
±4×1.25 |
6.3 |
YNd11 |
0.51 |
10.5 |
4.4 |
32 |
|
8000 |
0.51 |
5.3 |
38 |
|||||
|
10000 |
0.47 |
6.2 |
45 |
|||||
|
12500 |
0.47 |
7.4 |
53 |
|||||
|
16000 |
0.44 |
8.9 |
66 |
|||||
|
20000 |
0.44 |
10.6 |
79 |
|||||
|
25000 |
0.41 |
12.5 |
94 |
|||||
|
31500 |
0.41 |
14.9 |
111 |
|||||
|
40000 |
0.37 |
10.5~18 |
17.8 |
140 |
||||
|
50000 |
0.37 |
21 |
175 |
|||||
|
63000 |
0.34 |
25 |
209 |
|||||
Core Advantages and Features:
1. Dynamic Online Voltage Precise Regulation:
- Standard equipped with an On-Load Tap-Changer (OLTC), offering three fine-tuning ranges: ±4×1.25%, ±6×1.25%, and ±8×1.25%. It enables real-time adjustment of the high-voltage side voltage without power interruption, effectively responding to grid fluctuations and load changes to ensure highly stable output voltage.
2. Flexible Voltage Adaptation Capability:
- The high-voltage side has a rated voltage of 110kV.
- The low-voltage side provides multiple common distribution and industrial voltage levels, including 6.3kV, 6.6kV, 10.5kV, and 21kV, meeting the connection requirements of various user scenarios.
3. Optimized Electrical Performance and Reliability:
- Employs the standard YNd11 vector group, ensuring excellent system compatibility and straightforward protection configuration.
- Short-circuit impedance is optimized according to capacity (primarily 10.5%, with some capacities up to 10.5~18%), facilitating system short-circuit current control and operational stability.
- While providing dynamic voltage regulation, the design maintains a relatively low no-load current (minimum 0.34%), with both no-load and load losses optimized to balance functionality and energy efficiency.
4. Economical and Practical Capacity Coverage:
- The capacity range spans from 6.3 MVA to 63 MVA, suitable for small-to-medium regional substations, main step-down substations for industrial enterprises, renewable energy grid-connection points, and user substations with special voltage quality requirements.
Typical Applications:
- 110kV substations in urban areas and industrial parks with high requirements for voltage qualification rates.
- Dedicated substations for sensitive power users such as data centers, high-end manufacturing facilities, and important public infrastructure.
- Step-up substations for renewable energy projects like wind farms and photovoltaic power plants, particularly suitable for grid-connection points with significant voltage fluctuations.
- Regional grid interconnection substations serving voltage support and regulation functions.
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