A comprehensive study that explores the possibility of using passive networks and active converter control to facilitate continued operation of multi-terminal HVDC networks with minimum interruption during pole-to-pole dc short-circuit faults is presented. The primary objective of this study is to achieve continued operation of any multi-terminal HVDC network using relatively slow dc circuit breakers (with minimum operation time of 10ms), without over-stressing converter switches and without converter dc link voltages falling below the peak ac line voltage. The validity of the proposed method is confirmed using time-domain simulations. Results obtained from iterative simulations confirm the possibility of further extension of fault clearance time to more than 10ms, but at the expense of increased passive component size.
|Publication status||Accepted/In press - 30 Nov 2014|
|Event||Cigré International Symposium - Lund University, Lund, Sweden|
Duration: 27 May 2015 → 28 May 2015
|Conference||Cigré International Symposium|
|Period||27/05/15 → 28/05/15|
- fault clearance times
- modular multilevel converter
- multi-terminal high-voltage dc network
- pole-to-pole dc fault
Ased, G. P., Li, R., Holliday, D., Finney, S., Xu, L., Williams, B. W., ... Ito, H. (Accepted/In press). Continued operation of multi-terminal HVDC networks based on modular multilevel converters. Paper presented at Cigré International Symposium, Lund, Sweden.