Summary
HansaLink project introduces Europe’s first multi-terminal rigid bipole HVDC system, integrating an Offshore Wind Farm (OWF) with a 2 GW UK–Germany interconnector. It comprises three converter stations—two onshore and one offshore—linked via ±525 kV
Read more Read lessModular Multilevel Converter (MMC) technology and about 920 km of DC cable. The system enables bidirectional power flow and flexible configurations, including point-to-point and asymmetric monopole operation. This paper demonstrates implementation through real-time digital simulations, addressing energisation behaviour, Dynamic Braking System (DBS) performance during AC/DC faults, varying grid strength, and reconfiguration from bipole to monopole. Results confirm that DC-Pre-Insertion Resistor (DC-PIR) enhances system stability and should be included in the scheme. AC/DC fault studies emphasise DBS units at each onshore station to limit DC overvoltage. Findings show that under grid-following mode, system strength significantly affects stability, particularly during OWF energisation. During the transition to monopolar operation, DC cable de-energisation is required before reconfiguration, with a de-energisation time of approximately 300 ms.
Additional informations
| Publication type | Session Materials |
|---|---|
| Reference | B4_11283_2026 |
| Publication year | |
| Publisher | CIGRE |
| Country | United Kingdom |
| Study committees | |
| File size | 2 MB |
| Price for non member | 30 € |
| Price for member | 30 € |
Authors
ELGENEDY Mohamed - The National HVDC Centre United Kingdom; KHAN Asif - The National HVDC Centre United Kingdom; SHARMA Nikhil - The National HVDC Centre United Kingdom; FOOTE Colin - The National HVDC Centre United Kingdom; MARSHALL Benjamin - The National HVDC Centre United Kingdom; FINTZOS Georgios - Elia Grid International Belgium; SPAHIC Ervin - WindGrid, Elia Group Belgium
Keywords
Asymmetrical monopole, DC-PIR, MPI, Multi-terminal HVDC network, Rigid bipole.
