A ROBUST DAMPING CONTROLLER FOR AN HV-ACDC SYSTEM USING A LOOP-SHAPING PROCEDURE

Abu H. M. A. Rahim – Edwin P. Nowicki

   The design of a robust damping controller in the thyristor converter circuit of a high voltage ACDC link in a power system has been presented. The H_∞-based design has been realized through a relatively new graphical design procedure termed the 'loop-shaping' technique. A detailed power system model including the dynamics of the generator, exciter, HVDC link and converter controllers has been considered. The robust controller is tested for a number of operating conditions considering various disturbances on a power system. The robust rectifier controller has been shown to provide excellent damping characteristics over a wide range of operation.

Keywords: HVDC link, HV-ACDC, damping control, power system stability, robust control, loop-shaping

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