DL/T 5155-2016 in English
VALIDTechnical Code for Designing AC Station Service of 220kV~1000kV Substation
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$660.00
$660.00
本标准适用于新建、扩建和改建的220kV-1000kV变电站、开关站、串补站的交流站用电系统设计。
Introduction
Core changes in the standard revision
| Dimensions | 2002 Edition | 2016 Edition |
|---|---|---|
| Voltage Range | 220kV~500kV | Expanded to 1000kV |
| Chapter Structure | 8 Chapters | 10 Chapters (New chapters on terminology and electric shock protection) |
| Emergency Power Supply | Not clear | New requirements for self-provided power supply |
Analysis of key technical points
1. Power supply configuration specification
Power supply configuration requirements for substations of different voltage levels:
- 220kV station: at least 2 main transformer low-voltage side power supplies + 1 external power supply
- 1000kV station: 2 main transformer power supplies + 2 external power supplies from different sources
2. Load classification management
| Load type | Impact of power outage | Typical equipment |
|---|---|---|
| Class I | Direct impact on safety | Main transformer cooling system |
| Class II | Affect normal operation | Lighting system |
Implementation suggestions
Key points for transformer selection
- Give priority to the connection group Dyn11
- The capacity must meet the calculation formula S≥0.85P1+P2+P3
- When the voltage fluctuation is >5%, an on-load tap-changing transformer should be used
Short-circuit protection design
The short-circuit current calculation of the low-voltage system needs to consider:
- Power supply conditions of a single transformer
- Influence of feeder impedance
- For the specific algorithm of the 380V system, see Appendix C
Sample only — not a preview of DL/T 5155-2016
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