Control and Protection Strategy Study of VSC Station Fault at Hybrid HVDC Transmission System
- Resource Type
- Authors
- Qi Tian; Lulu Liu; Kuan Zheng; Guoyun Su; Zhilei Si; Yongjie Hu
- Source
- Journal of Physics: Conference Series. 2479:012030
- Subject
- History
Computer Science Applications
Education
- Language
- ISSN
- 1742-6596
1742-6588
LCC-VSC UHV hybrid cascaded DC transmission system will face over-voltage problems caused by power surplus when receiving terminal VSC station fault occurs. An over-voltage suppression strategy based on the action input of a high-voltage controllable arrester and the stepwise blocking of non-fault VSC at the receiving end is proposed, and a dynamic simulation test system is built to verify that the stepwise blocking protection scheme can effectively reduce the DC voltage stress of fault VSC by about 25.9%. Based on the test results, the effectiveness of the over-voltage suppression scheme of VSC at the receiving end in practical projects can be demonstrated by analogy.