Abstract
This paper presents a multi-terminal high-power DC/DC converter configuration based on hybrid MMC topology with fault blocking capability for interconnecting HVDC systems. Its main functions include bidirectional power flow, step-up and step-down operation and fault isolation equivalent to a DC circuit breaker. By contrast to the conventional MMC based DC/DC converter, the proposed DC/DC converter with hybrid MMC configuration has the advantage of being able to block the DC/DC converter terminal connecting to faulty DC grid section, while continue operating the other terminals connected to healthy DC grid sections. The proposed DC/DC converter operation is analyzed and its control is described. Simulation results using Matlab/Simulink are presented to demonstrate the robust performance during dc fault conditions.
Original language | English |
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Title of host publication | 11th IET International Conference on AC and DC Power Transmission |
Pages | 1-6 |
Number of pages | 6 |
DOIs | |
Publication status | Published - 1 Feb 2015 |
Keywords
- bidirectional power flow
- step-up operation
- step-down operation
- simulink
- power transmission faults
- power system interconnection
- power grids
- circuit breakers
- DC/DC converter