Product Overview
This series consists of high-performance, high-reliability core power transmission equipment designed for 500kV EHV transmission networks and large-scale power stations. It efficiently converts 500kV extra-high voltage energy into medium voltage (13.8kV to 27kV) suitable for distribution networks.
Serving as the key component for grid backbone nodes, it is engineered to ensure maximum stability and operational efficiency in demanding environments.
Technical Specifications
|
(MVA) |
Rated Voltage and Tapping Range |
Vector Group |
No Load Current |
Short-circuit Impedance |
No load Losses |
On load Losses |
||
|
HV |
Tapping Range |
LV |
||||||
|
120 |
500 |
±2×2.5 |
13.8,15.75 |
YNd11 |
0.2 |
14 |
41 |
356 |
|
160 |
0.16 |
50 |
441 |
|||||
|
240 |
0.16 |
69 |
599 |
|||||
|
300 |
13.8,15.75,18 |
0.16 |
80 |
707 |
||||
|
370 |
15.75,18,20 |
0.12 |
94 |
810 |
||||
|
400 |
18,20,24 |
0.12 |
96 |
855 |
||||
|
420 |
15.75,18,20 |
0.12 |
1 4 o r 1 6 |
102 |
860 |
|||
|
480 |
15.75,18,20 |
0.12 |
110 |
954 |
||||
|
600 |
15.75,18,20,24 |
0.12 |
143 |
1202 |
||||
|
720 |
18,20,24 |
0.08 |
168 |
1382 |
||||
|
750 |
20,22 |
0.08 |
1 6 o r 1 8 |
173 |
1422 |
|||
|
780 |
22 |
0.08 |
176 |
1467 |
||||
|
860 |
0.08 |
190 |
1575 |
|||||
|
1140 |
27 |
0.08 |
237 |
1949 |
||||
|
1170 |
0.08 |
242 |
1980 |
|||||
Core Advantages
- Strong Power Transfer Capability: Standard voltages of 500/525/550kV and a capacity range from 120 MVA to 1170 MVA, meeting diverse EHV substation and power plant grid-connection requirements.
- Excellent Energy Efficiency: Optimized core design results in extremely low no-load current (0.08% - 0.2%) and minimized no-load losses, significantly reducing operational costs and Total Cost of Ownership (TCO) over the lifecycle.
- Flexible Voltage Adaptation: Equipped with a ±2×2.5% off-circuit tap-changer on the HV side to ensure stable output during grid fluctuations. LV side offers versatile options from 13.8kV to 27kV.
- Robust & Reliable Design: Classic oil-immersed construction with a standard YNd11 vector group and 14%-18% short-circuit impedance. The off-circuit tap-changer provides a simple, reliable structure that requires minimal maintenance.
Typical Applications
- Main transformers for 500kV EHV substations.
- Step-up stations or grid connection units for large-scale hydro, thermal, and nuclear power plants.
- Hub substations for inter-regional power transmission networks.
- HV power reception and distribution conversion for large-scale industrial complexes.
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