DOI:10.35833/MPCE.2019.000327 |
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A DC Chopper Topology to Mitigate Commutation Failure of Line Commutated Converter Based High Voltage Direct Current Transmission |
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Page view: 153
Net amount: 709 |
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Author:
Chunyi Guo1,Bo Liu1,Chengyong Zhao1
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Author Affiliation:
State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing, China
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Foundation: |
This work was supported by National Natural Science Foundation of China (No. 51877077). |
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Abstract: |
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. |
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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Received:May 16, 2019
Online Time:2020/03/24 |
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