Abstract
This paper studies influence of control system dynamics on the small-signal stability of modular multilevel converter (MMC) based multi-terminal DC (MTDC) transmission system. The small signal model is derived based on the state–space model of an MMC-based MTDC. Eigenvalue analysis and participation factor analysis are applied to study the inherent oscillatory modes of MMC-based MTDC transmission systems. The impacts of control system parameters on small-signal stability of the system are investigated through sensitivity analysis. The study shows that the control systems strongly affected the small signal stability of the MMC-based MTDC and the d-axis proportional gains in d–q decoupling main controllers have great impact on system stability, which needs to be properly selected for stability enhancement.
| Original language | English |
|---|---|
| Pages (from-to) | 1130-1135 |
| Number of pages | 6 |
| Journal | Energy Reports |
| Volume | 6 |
| DOIs | |
| State | Published - Dec 2020 |
Keywords
- Control system
- MMC-based MTDC
- Parameter sensitivity
- Small signal stability analysis
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