TY - GEN
T1 - Non-interruptible energy transfer algorithm applied to multi-terminal VSC-HVDC with modular multilevel converter
AU - Son, Gum Tae
AU - Lee, Hyunwoo
AU - Choi, Donghee
AU - Park, Jung Wook
PY - 2015/12/14
Y1 - 2015/12/14
N2 - This paper presents a design method to provide failure-tolerant operation of converter in the multi-terminal voltage-source-converter high-voltage direct current system (VSC-HVDC). It might be connected to an offshore wind farm with modular multilevel converter (MMC) topology. To fully implement the multi-terminal VSC-HVDC, three controllers, which are the system operator controller, supervisory controller, and MMC controller, are designed. For the sustainable energy transfer in case that the DC bus voltage control of a converter is failed, the communication-based power balancing algorithm is then proposed. That is, the voltage droop control and the constant flux control in offshore wind farm converter are used for a back-up operation to regulate a constant DC bus voltage. In particular, the wind power reduction via the constant flux control is comprehensively analyzed. To evaluate the performances of proposed algorithm, several case studies are carried out by time-domain simulation based on the power systems computer aided design/electromagnetic transients including DC (PSCAD /EMTDC®) software. The results show that the offshore wind farm consistently supplies the active power to the multi-terminal VSC-HVDC even when the different terminal in a severe fault condition is to be blocked according to its current regulation.
AB - This paper presents a design method to provide failure-tolerant operation of converter in the multi-terminal voltage-source-converter high-voltage direct current system (VSC-HVDC). It might be connected to an offshore wind farm with modular multilevel converter (MMC) topology. To fully implement the multi-terminal VSC-HVDC, three controllers, which are the system operator controller, supervisory controller, and MMC controller, are designed. For the sustainable energy transfer in case that the DC bus voltage control of a converter is failed, the communication-based power balancing algorithm is then proposed. That is, the voltage droop control and the constant flux control in offshore wind farm converter are used for a back-up operation to regulate a constant DC bus voltage. In particular, the wind power reduction via the constant flux control is comprehensively analyzed. To evaluate the performances of proposed algorithm, several case studies are carried out by time-domain simulation based on the power systems computer aided design/electromagnetic transients including DC (PSCAD /EMTDC®) software. The results show that the offshore wind farm consistently supplies the active power to the multi-terminal VSC-HVDC even when the different terminal in a severe fault condition is to be blocked according to its current regulation.
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U2 - 10.1109/IAS.2015.7356944
DO - 10.1109/IAS.2015.7356944
M3 - Conference contribution
AN - SCOPUS:84957630503
T3 - IEEE Industry Application Society - 51st Annual Meeting, IAS 2015, Conference Record
BT - IEEE Industry Application Society - 51st Annual Meeting, IAS 2015, Conference Record
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 51st Annual Meeting on IEEE Industry Application Society, IAS 2015
Y2 - 11 October 2015 through 22 October 2015
ER -