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Addition of four-quadrant power controllability to multi-level VSC HVDC transmission

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3 Author(s)
Liu, Y.H. ; Inner Mongolia Univ. of Technol., Hohhot ; Arrillaga, J. ; Watson, N.R.

In self-commutating multi-level voltage source conversion (VSC) transmission, the reactive power contributions of the two converter terminals are interdependent. To overcome this problem, a new control scheme is proposed, applicable to high voltage direct current (HVDC) interconnections of large power ratings with more than one 12-pulse group per converter. The basis of the proposed strategy is the use of a controllable phase shift between the firings of the individual converter groups. The theory is verified by extensive EMTDC simulation.

Published in:

Generation, Transmission & Distribution, IET  (Volume:1 ,  Issue: 6 )