| Abstract: |
| Subsequent commutation failure (SCF) can be easily generated during the frst commutation failure (CF) recovery
process in a line-commutated converter-based high voltage direct-current system. SCF poses a signifcant threat
to the safe and stable operation of power systems, and accurate prediction of CF is thus important. However, SCF
is afected by the operating characteristics of the main circuit and the coupling efects of sequential control response
in the inverter station. These are difcult to predict accurately. In this paper, a new SCF prediction method considering
the control response is proposed based on the physical principle of SCF. The time sequence and switching conditions
of the controllers at diferent stages of the frst CF recovery process are described, and the corresponding equations
of commutation voltage afected by diferent controllers are derived. The calculation method of the SCF threshold
voltage is proposed, and the prediction method is established. Simulations show that the proposed method can
predict SCF accurately and provide useful tools to suppress SCF |
| Key words: Line-commutated converter based high-voltage direct-current (LCC-HVDC), Subsequent commutation
failure (SCF), Converter station, Prediction |
| DOI：10.1186/s41601-023-00323-9 |
|
| Fund:This work was supported in part by the National Natural Science Foundation
of China under Grant (51877018) |
|
