Protection of large partitioned MTDC Networks Using DC-DC converters and circuit breakers

This paper proposes a DC fault protection strategy for large multi-terminal HVDC (MTDC) network where MMC based DC-DC converter is configured at strategic locations to allow the large MTDC network to be operated interconnected but partitioned into islanded DC network zones following faults. Each DC network zone is protected using either AC circuit breakers coordinated with DC switches or slow mechanical type DC circuit breakers to minimize the capital cost. In case of a DC fault event, DC-DC converters which have inherent DC fault isolation capability provide ‘firewall’ between the faulty and healthy zones such that the faulty DC network zone can be quickly isolated from the remaining of the MTDC network to allow the healthy DC network zones to remain operational. The validity of the proposed protection arrangement is confirmed using MATLAB/SIMULINK simulations.

[1]  John E. Fletcher,et al.  Hybrid Cascaded Modular Multilevel Converter With DC Fault Ride-Through Capability for the HVDC Transmission System , 2015, IEEE Transactions on Power Delivery.

[2]  Callum MacIver,et al.  A Reliability Evaluation of Offshore HVDC Grid Configuration Options , 2016, IEEE Transactions on Power Delivery.

[3]  Sungmin Kim,et al.  Control of voltage source converter based multi-terminal DC grid under DC fault operating condition , 2014, 2014 IEEE Energy Conversion Congress and Exposition (ECCE).

[4]  Xu Yan,et al.  Protection coordination of meshed MMC-MTDC transmission systems under DC faults , 2013, 2013 IEEE International Conference of IEEE Region 10 (TENCON 2013).

[5]  K. Kamei,et al.  HVDC Circuit Breakers for HVDC Grid Applications , 2015 .

[6]  Boon-Teck Ooi,et al.  DC overvoltage control during loss of converter in multiterminal voltage-source converter-based HVDC (M-VSC-HVDC) , 2003 .

[7]  Oliver Cwikowski,et al.  Multi-terminal VSC-HVDC Pole-to-pole Fault Analysis and Fault Recovery Study , 2015 .

[8]  Lie Xu,et al.  DC fault analysis of VSC based multi-terminal HVDC systems , 2012 .

[9]  Boon-Teck Ooi,et al.  Protection of VSC-multi-terminal HVDC against DC faults , 2002, 2002 IEEE 33rd Annual IEEE Power Electronics Specialists Conference. Proceedings (Cat. No.02CH37289).

[10]  C M Franck,et al.  HVDC Circuit Breakers: A Review Identifying Future Research Needs , 2011, IEEE Transactions on Power Delivery.

[11]  Lie Xu,et al.  DC fault analysis of MMC based HVDC system for large offshore wind farm integration , 2013 .

[12]  Lie Xu,et al.  Analysis of voltage source converter-based high-voltage direct current under DC line-to-earth fault , 2015 .

[13]  Dragan Jovcic,et al.  Developing regional, radial DC grids and their interconnection into large DC grids , 2014, 2014 IEEE PES General Meeting | Conference & Exposition.

[14]  Rong Zeng,et al.  Design and Operation of a Hybrid Modular Multilevel Converter , 2015, IEEE Transactions on Power Electronics.

[15]  Rong Zeng,et al.  DC/DC converters based on hybrid MMC for HVDC grid interconnection , 2015 .

[16]  Boon-Teck Ooi,et al.  Locating and Isolating DC Faults in Multi-Terminal DC Systems , 2007, IEEE Transactions on Power Delivery.

[17]  Keith Bell,et al.  DC fault protection of multi-terminal HVDC systems using DC network partition and DC circuit breakers , 2015 .

[18]  Stephen J. Finney,et al.  An alternative protection strategy for multi-terminal HVDC , 2014 .

[19]  Lie Xu,et al.  HVDC transmission for large offshore wind farms , 2002 .

[20]  Dragan Jovcic,et al.  Evaluation of Semiconductor Based Methods for Fault Isolation on High Voltage DC Grids , 2013, IEEE Transactions on Smart Grid.

[21]  Lie Xu,et al.  Grid connection of large offshore wind farms using HVDC , 2006 .

[22]  Dragan Jovcic,et al.  Offshore DC Grids as an Interconnection of Radial Systems: Protection and Control Aspects , 2015, IEEE Transactions on Smart Grid.

[23]  Stephen J. Finney,et al.  Continuous Operation of Radial Multiterminal HVDC Systems Under DC Fault , 2016, IEEE Transactions on Power Delivery.

[24]  Keith Bell,et al.  Considerations in design of an offshore network , 2014 .

[25]  Rainer Marquardt,et al.  Modular Multilevel Converter topologies with DC-Short circuit current limitation , 2011, 8th International Conference on Power Electronics - ECCE Asia.

[26]  Jin Yang,et al.  Multiterminal DC Wind Farm Collection Grid Internal Fault Analysis and Protection Design , 2010, IEEE Transactions on Power Delivery.