Impact of Saturated Iron-Core Superconducting Fault Current Limiters on Traveling Wave Based Fault Location in DC Transmission Lines
The advancement of high-voltage direct current (HVDC) transmission is crucial for future smart grids, but it brings challenges like high short-circuit fault currents with rapid rise rates. Saturated iron-core superconducting fault current limiters (SISFCLs), effective in AC systems, also show promise in DC systems. However, they can affect fault location techniques based on traveling waves (TWs) due to their impedance characteristics. This study investigates the impact of SISFCLs on TW-based fault location in DC systems. We analyze this influence analytically and simulate a ±320 kV modular multilevel converter (MMC) DC system in PSCAD/EMTDC, incorporating the SISFCL model computed in COMSOL Multiphysics. Simulations of positive-pole-to-ground faults reveal that SISFCLs reduce the accuracy of TW-based fault location. The paper also outlines future research directions for integrating SISFCLs into DC systems.
Authors
- Ying Xu (ORCID: https://orcid.org/0000-0001-5248-6004)
- Baohua Liu (ORCID: https://orcid.org/0000-0002-1599-8059)
- Shuai Hou (ORCID: https://orcid.org/0009-0004-2112-2020)
- Jianzhao Geng
Institutions
- Huazhong University of Science and Technology (CN)
- China Southern Power Grid (China) (CN)
Publication Details
- Journal
- IEEE Transactions on Applied Superconductivity
- Published
- 2025-01-27
- DOI
- https://doi.org/10.1109/tasc.2025.3531825
- Primary Topic
- HVDC Systems and Fault Protection
- Type
- article
- Field-Weighted Citation Impact
- 0.00