Abstract
This paper examines two new bidirectional hybrid dc circuit breaker topologies for application in meshed dc grids. The goal is to retain performance of hybrid DC CB with bidirectional current interruption, while reducing semiconductor
count, DC CB size and weight. The fault current is routed to the unidirectional internal valve using multiple additional ultrafast disconnectors. Operation of both topologies is studied using a 320 kV, 16 kA simulation model, as well as demonstrated on a 900 V, 500 A lab prototype. The control systems are presented and discussed in detail. The low-voltage hardware prototypes verify
performance of several new technical and operating solutions in laboratory conditions. A comparison is made with the existing DC CB topologies and performance and reliability compromises of each topology are assessed. The conclusion is that it might be possible to halve the DC CB semiconductor count while retaining same 2 ms opening speed and bidirectional operation.
count, DC CB size and weight. The fault current is routed to the unidirectional internal valve using multiple additional ultrafast disconnectors. Operation of both topologies is studied using a 320 kV, 16 kA simulation model, as well as demonstrated on a 900 V, 500 A lab prototype. The control systems are presented and discussed in detail. The low-voltage hardware prototypes verify
performance of several new technical and operating solutions in laboratory conditions. A comparison is made with the existing DC CB topologies and performance and reliability compromises of each topology are assessed. The conclusion is that it might be possible to halve the DC CB semiconductor count while retaining same 2 ms opening speed and bidirectional operation.
Original language | English |
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Pages (from-to) | 269-277 |
Number of pages | 9 |
Journal | IEEE Transactions on Power Delivery |
Volume | 35 |
Issue number | 1 |
Early online date | 23 Apr 2019 |
DOIs | |
Publication status | Published - 1 Feb 2020 |
Bibliographical note
Funding Information:This work was supported by the European Union’s Horizon 2020 Research and Innovation Program under Grant 691714. Paper no. TPWRD-01506-2018.
Keywords
- DC meshed grids
- HVDC protection
- HCB
- fault current limiting
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Dragan Jovcic
- Engineering, Aberdeen HVDC Research Centre
- Centre for Energy Transition
- Engineering, Engineering - Chair in Engineering
Person: Academic