Details

Autor(en) / Beteiligte

• Monadi, Mehdi
• Koch-Ciobotaru, Cosmin
• Luna, Alvaro
• Ignacio Candela, Jose
• Rodriguez, Pedro

Titel

Multi-terminal medium voltage DC grids fault location and isolation

Ist Teil von

• IET generation, transmission & distribution, 2016-11, Vol.10 (14), p.3517-3528

Ort / Verlag

The Institution of Engineering and Technology

Erscheinungsjahr

2016

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Voltage source converters (VSCs) are highly vulnerable to DC fault current; thus, protection is one of the most important concerns associated with the implementation of multi-terminal VSC-based DC networks. This study proposes a protection strategy for medium voltage DC distribution systems. The strategy consists of a communication-assisted fault location method and a fault isolation scheme that provides an economic, fast and selective protection by means of using the minimum number of DC circuit breakers. This study also introduces a backup protection which is activated if communication network fails. The effectiveness of the proposed protection strategy is analysed through real-time simulation studies by use of the hardware-in-the-loop approach. Furthermore, the effects of fault isolation process on the connected loads are also investigated. The results show that the proposed strategy can effectively protect multi-terminal DC distribution networks and VSC stations against different types of faults.