Pole-to-Pole Fault Protection of Hybrid-MMC-based MVDC Distribution Systems
- Resource Type
- Conference
- Authors
- Huang, Xing; Qi, Lisa; Pan, Jiuping
- Source
- 2018 IEEE Industry Applications Society Annual Meeting (IAS) Industry Applications Society Annual Meeting (IAS), 2018 IEEE. :1-7 Sep, 2018
- Subject
- Power, Energy and Industry Applications
Multilevel converters
Simulation
Fault protection
Industry applications
Medium voltage
Topology
DC distribution systems
Fault location
DC distribution system
AC-DC power converters
impedance
- Language
- ISSN
- 2576-702X
DC fault handling is a critical design and operation issue for DC distribution systems. DC distribution protection should be rapid due to the fast growth of fault currents, and cost-effective high speed DC breakers are challenging, especially in medium voltage DC (MVDC) distribution systems. A hybrid MMC (Modular Multilevel Converter) based DC fault protection and restoration method is proposed for pole-to-pole fault protection of MVDC systems. The converter topology and associated control are able to interrupt DC fault current rapidly and isolate DC fault with zero-current turn-off by DC disconnectors. Furthermore, the proposed method includes fast converter restarting and DC system reconnection after fault removal. Simulation results of the pole-to-pole fault protection in a MVDC distribution system show satisfactory performance.