Abstract
In this paper, the fault characteristics of the medium voltage DC (MVDC) systems considering different fault protection schemes are studied. The fault protection of an offshore MVDC network is considered together with the configuration of the protection equipment, DC transformers, and the onshore MVDC stations. Different protection schemes considering DC circuit breakers (DCCBs) and DC switches (DCSs) are implemented. In addition to a half-bridge (HB) submodule based modular multilevel converter (MMC), the application of a full-bridge (FB) submodule based MMC as the onshore station for DC fault protection is also assessed. Dual active bridge (DAB) and single active bridges (SAB) are studied and the impacts of the medium voltage side DC capacitor of the DAB on DC fault current are investigated. Simulation results confirm that the SAB+FB-MMC+DCS scheme provides a promising solution for the MVDC system for offshore wind power transmission.
| Original language | English |
|---|---|
| Pages (from-to) | 101-105 |
| Number of pages | 5 |
| Journal | IET Conference Proceedings |
| Volume | 2023 |
| Issue number | 29 |
| Early online date | 18 Dec 2023 |
| DOIs | |
| Publication status | Published - 6 Aug 2024 |
| Event | Renewable Power Generation and Future Power Systems Conference 2023 (RPG 2023 UK) - Glasgow, United Kingdom Duration: 15 Nov 2023 → 16 Nov 2023 |
Keywords
- medium voltage DC (MVDC) systems
- faults
- protection schemes
- offshore wind power transmission
