Abstract
The assumption of the AC commutating voltages being unchanged during the fast HVDC simulation can affect the results of the two-time-step transient stability simulation of the AC/DC power system. This effect and its origin are analyzed. The assumption may delay the action of some HVDC controls with switching characteristics, resulting in errors in simulation results, and may even cause misoperation of the HVDC switching controls in the case of the study of multi-infeed HVDC systems. A variable-step simulation method considering HVDC switching controls is proposed. It can make the HVDC switching controls act in time during the simulation. Both the conventional two-time-step method and the new variable-step method were implemented. Cases study shows that the proposed method can obtain a better accuracy than the conventional one, and the calculation efficiency is not eroded.
| Original language | English |
|---|---|
| Pages (from-to) | 16-21 |
| Number of pages | 6 |
| Journal | Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering |
| Volume | 29 |
| Issue number | 34 |
| Publication status | Published - 5 Dec 2009 |
| Externally published | Yes |
Keywords
- AC/DC power system
- HVDC controls
- Multi-infeed HVDC
- Switching characteristics
- Transient stability simulation
- Variable-step