Journal
JOURNAL OF MODERN POWER SYSTEMS AND CLEAN ENERGY
Volume 8, Issue 2, Pages 345-355Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.35833/MPCE.2019.000327
Keywords
Line commutated converter based high-voltage direct current (LCC-HVDC) transmission; DC chopper; power consumption sub-module based on thyristor full-bridge module; (TFB-PCSM); commutation failure (CF); fault recovery capability
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Funding
- National Natural Science Foundation of China [51877077]
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To reduce the probability of commutation failure (CF) of a line commutated converter based high-voltage direct current (LCC-HVDC) transmission, a DC chopper topology composed of power consumption sub-modules based on thyristor full-bridge module (TFB-PCSM) is proposed. Firstly, the mechanism of the proposed topology to mitigate CF is analyzed, and the working modes of TFB-PCSM in different operation states are introduced. Secondly, the coordinated control strategy between the proposed DC chopper and LCC-HVDC is designed, and the voltage-current stresses of the TFB-PCSMs are investigated. Finally, the ability to mitigate the CF issues and the fault recovery performance of LCC-HVDC system are studied in PSCAD/EMTDC. The results show that the probability of CF of LCC-HVDC is significantly reduced, and the performances of fault recovery are effectively improved by the proposed DC chopper.
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