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J. Renewable Sustainable Energy 1, 043104 (2009); doi:10.1063/1.3170923 (11 pages)

A robust control algorithm based high voltage direct current system connected to a weak ac grid

Vinod Kumar 1,
R. Bansal 2,
and R. Joshi 1

1 Department of Electrical Engineering, CTAE, Udaipur-313001, India Map This map
2 School of Information Technology and Electrical Engineering, The University of Queensland, St. Lucia, Queensland 4072, Australia Map This map

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During various faults in a high voltage direct current (HVDC) system, the voltage gets reduced, which in turn results into commutation failure, which can deteriorate the availability of HVDC links and thus affect the performance of the power system. In this paper, efforts are made to ride through these faults and so to lower the effect of commutation failure on the power system, and the remedy is implemented by using a robust control algorithm which utilizes a new space vector modulation-based strategy. The validity and effectiveness of the control algorithm are verified by PSCAD/EMTDC-based simulation which shows that with the proposed control, the system can operate steadily, has the capability to restore steady state condition when short-circuit fault occurs, and is feasible technically and obvious in advantages.

© 2009 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. DESCRIPTION OF MODELED HVDC SYSTEM
    1. Power circuit modeling
    2. Control system model
  3. SPACE VECTOR MODULATION FOR CONVERTERS
  4. STEADY STATE dc: CONVERTER BRIDGE EQUATIONS
  5. TEST CASES
    1. Case 1: Steady state operation
    2. Case 2: dc fault
    3. Case 3: ac line-to-ground fault of the receiving side
    4. Case 4: The function of filter
  6. CONCLUSIONS

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KEYWORDS and PACS

Keywords

failure analysis, HVDC power transmission, power grids, power transmission control, power transmission faults

PACS

  • 84.70.+p

    High-current and high-voltage technology: power systems; power transmission lines and cables

  • 89.30.-g

    Fossil fuels and nuclear power

  • 07.05.Dz

    Control systems

ARTICLE DATA

History
Received 13 August 2008
Accepted 15 June 2009
Published 9 July 2009
Permalink
http://link.aip.org/link/JRSEBH/v1/i4/p043104/s1

PUBLICATION DATA

ISSN:

19417012 (print)  
19417012 (online)

Publisher:

$abstract.society.value is a Member of CrossRef American Institute of Physics

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Figures (9) Tables (1)

Figures (click on thumbnails to view enlargements)

FIG. 1
The structure of the filter.
FIG. 1 View Enlargement | Download High Resolution Image (.zip file)
FIG. 2
DQ-type GFU.
FIG. 2 View Enlargement | Download High Resolution Image (.zip file)
FIG. 3
Simulation results for steady state operation on rectifier.
FIG. 3 View Enlargement | Download High Resolution Image (.zip file)
FIG. 4
Simulation results for steady state operation on ac voltage.
FIG. 4 View Enlargement | Download High Resolution Image (.zip file)
FIG. 5
Simulation results when dc line-to-ground fault occurs on ac voltage.
FIG. 5 View Enlargement | Download High Resolution Image (.zip file)
FIG. 6
Simulation results when dc line-to-ground fault occurs on rectifier.
FIG. 6 View Enlargement | Download High Resolution Image (.zip file)
FIG. 7
Simulation results when a line-to-ground fault occurs on phase A of the rectifier side.
FIG. 7 View Enlargement | Download High Resolution Image (.zip file)
FIG. 8
Simulation results when a line-to-ground fault occurs on phase A of the inverter side AC system.
FIG. 8 View Enlargement | Download High Resolution Image (.zip file)
FIG. 9
Results of filter function.
FIG. 9 View Enlargement | Download High Resolution Image (.zip file)

Tables

Table I. Results of SVM and filter harmonic.

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