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After a detailed analysis of the dynamic processes in the HVDC converter when asymmetric faults occur in the ac system, a sequence-component model of converter based on the advanced switching functions is present. Furthermore, a linear direct method of harmonic calculation is proposed. In this method, both the effect of the harmonic interaction between the ac and dc system and the dynamic processes...
This paper presents a modeling technique to the HVDC converter under asymmetric conditions using the dynamic phasor. A detailed analysis of the dynamic processes of HVDC converter when asymmetric faults occur in the ac system, including variation of switching instants and unbalanced commutation overlaps is presented. Based on which, an advanced dynamic phasors model for HVDC converters is proposed,...
This paper introduces the facing technical challenges and up to date research achievement of ?? 800 kV UHVDC transmission technology in China. The insulation coordination technology, external insulation technology, internal insulation technology and development of major ?? 800 kV UHVDC equipments are introduced emphatically. Most of these research items to be done are the first time in the world....
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