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DC voltage limit compliance in voltage-source converter based multi-terminal HVDC

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2 Author(s)
Weixing Lu ; CYME Int. T&D, Que., Canada ; Ooi, B.T.

By adjusting Vref, the voltage reference setting of the DC voltage regulator or the power reference settings Pisp of the remaining converter stations, the steady-state DC bus voltages of the voltage-source converter based multi-terminal HVDC system can be made to comply with voltage limits. When any one of the converter stations is lost, over-voltage can destroy a converter station within a fraction of a second. As there is no time to reset the settings, the references must be determined in the very beginning to anticipate the accidental loss of a converter. The paper shows how the well-known voltage sensitivity method and the Lagrange multiplier method are adapted successfully to determine the reference settings for pre- and post-fault conditions.

Published in:

Power Engineering Society General Meeting, 2005. IEEE

Date of Conference:

12-16 June 2005