GB/T 40581-2021 in English
VALIDCalculation specification for power system security and stability
- Issued on:2021-10-11
- Implemented on:2022-05-01
- File Format:PDF
- Delivery:Via email within 5 business days
$534.00
《GB/T 40581-2021电力系统安全稳定计算规范》由TC446（全国电网运行与控制标准化技术委员会）归口，主管部门为中国电力企业联合会。
Introduction
Core content analysis
| Stability type | Calculation method | Key criterion | Reserve standard |
|---|---|---|---|
| Static power angle stability | Characteristic root method/practical algorithm | dP/dδ>0 | Kp≥15% |
| Transient power angle stability | Time domain simulation method | The first and second swings do not lose step | ≥10% after N-1 fault |
| Voltage stability | PV/QV curve analysis | V≥0.8pu(within 10s) | Pmargin≥8% |
Technology Evolution Analysis
This standard systematically integrates the calculation method of short-circuit ratio (MRSCR) of new energy stations for the first time, and clearly requires:
- MRSCR of the step-up transformer side of the new energy power generation unit≥1.5
- MRSCR of the grid-connected point≥2.0 (recommended＞3.0)
- Extremely weak systems (MRSCR＜2.0) require electromagnetic transient verification
Compared with the traditional DC short-circuit ratio standard, a new multi-infeed interaction factor (MIIF) calculation method is added to more accurately reflect the impact of multiple DC coupling.
Implementation Suggestions
- Synchronous generators should be modeled using a 5-6th order detailed model, with a damping factor η of 0-0.05
- New energy sites need to be equipped with a dynamic reactive compensation device (SVG/SVC)
- Grid stratification and zoning strategy should be adopted when short-circuit current exceeds the standard
- Subsynchronous oscillation risk areas should be equipped with PSS+ torsional vibration protection
Standard Innovations
| Fields | New Content | Technical Value |
|---|---|---|
| New Energy Access | Subsynchronous/Supersynchronous Oscillation Analysis | Solving the High-Frequency Oscillation Problem Caused by Converters |
| DC Systems | Multiple Infeed Short Circuit Ratio (MISCR) | Quantifying the Interaction of Multiple DC Circuits |
| Simulation Technology | Electromechanical-Electromagnetic Hybrid Simulation | Improving the Simulation Accuracy of Power Electronic Equipment |
Loading PDF document...
Error loading PDF. Please make sure the file is valid and try again.
We also recommend
-
GB/T 33591-2017 in English
Technical specification of time synchronism system and equipment in smart substation
2017-05-12 -
GB/T 46131-2025 in English
Technical requirements and test methods for tap-changer for ultra high voltage transformers
2025-08-29 -
GB/T 40600-2021 in English
Technical requirements for dispatching function of wind farm power control system
2021-10-11
