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Title: Characteristic investigation and control of a modular multilevel converter-based HVDC system under single-line-to-ground fault conditions

This paper presents the analysis and control of a multilevel modular converter (MMC)-based HVDC transmission system under three possible single-line-to-ground fault conditions, with special focus on the investigation of their different fault characteristics. Considering positive-, negative-, and zero-sequence components in both arm voltages and currents, the generalized instantaneous power of a phase unit is derived theoretically according to the equivalent circuit model of the MMC under unbalanced conditions. Based on this model, a novel double-line frequency dc-voltage ripple suppression control is proposed. This controller, together with the negative-and zero-sequence current control, could enhance the overall fault-tolerant capability of the HVDC system without additional cost. To further improve the fault-tolerant capability, the operation performance of the HVDC system with and without single-phase switching is discussed and compared in detail. Lastly, simulation results from a three-phase MMC-HVDC system generated with MATLAB/Simulink are provided to support the theoretical analysis and proposed control schemes.
Authors:
 [1] ;  [1] ;  [1] ;  [2] ;  [3] ;  [3]
  1. The Univ. of Tennessee, Knoxville, TN (United States)
  2. Harbin Institute of Technology, Harbin (China)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
IEEE Transactions on Power Electronics
Additional Journal Information:
Journal Volume: 30; Journal Issue: 1; Journal ID: ISSN 0885-8993
Publisher:
IEEE
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
24 POWER TRANSMISSION AND DISTRIBUTION; high-voltage direct-current (HVDC); modular multilevel converter (MMC); single-line-to-ground (SLG) fault; voltage control; HVDC transmission; current control; circuit faults; frequency control; reactive power; converters
OSTI Identifier:
1326497

Shi, Xiaojie, Wang, Zhiqiang, Liu, Bo, Liu, Yiqi, Tolbert, Leon M., and Wang, Fred. Characteristic investigation and control of a modular multilevel converter-based HVDC system under single-line-to-ground fault conditions. United States: N. p., Web. doi:10.1109/TPEL.2014.2323360.
Shi, Xiaojie, Wang, Zhiqiang, Liu, Bo, Liu, Yiqi, Tolbert, Leon M., & Wang, Fred. Characteristic investigation and control of a modular multilevel converter-based HVDC system under single-line-to-ground fault conditions. United States. doi:10.1109/TPEL.2014.2323360.
Shi, Xiaojie, Wang, Zhiqiang, Liu, Bo, Liu, Yiqi, Tolbert, Leon M., and Wang, Fred. 2014. "Characteristic investigation and control of a modular multilevel converter-based HVDC system under single-line-to-ground fault conditions". United States. doi:10.1109/TPEL.2014.2323360. https://www.osti.gov/servlets/purl/1326497.
@article{osti_1326497,
title = {Characteristic investigation and control of a modular multilevel converter-based HVDC system under single-line-to-ground fault conditions},
author = {Shi, Xiaojie and Wang, Zhiqiang and Liu, Bo and Liu, Yiqi and Tolbert, Leon M. and Wang, Fred},
abstractNote = {This paper presents the analysis and control of a multilevel modular converter (MMC)-based HVDC transmission system under three possible single-line-to-ground fault conditions, with special focus on the investigation of their different fault characteristics. Considering positive-, negative-, and zero-sequence components in both arm voltages and currents, the generalized instantaneous power of a phase unit is derived theoretically according to the equivalent circuit model of the MMC under unbalanced conditions. Based on this model, a novel double-line frequency dc-voltage ripple suppression control is proposed. This controller, together with the negative-and zero-sequence current control, could enhance the overall fault-tolerant capability of the HVDC system without additional cost. To further improve the fault-tolerant capability, the operation performance of the HVDC system with and without single-phase switching is discussed and compared in detail. Lastly, simulation results from a three-phase MMC-HVDC system generated with MATLAB/Simulink are provided to support the theoretical analysis and proposed control schemes.},
doi = {10.1109/TPEL.2014.2323360},
journal = {IEEE Transactions on Power Electronics},
number = 1,
volume = 30,
place = {United States},
year = {2014},
month = {5}
}