Abstract：The variable speed constant frequency (VSCF) power system based on two stage matrix converter (TSMC) has advantages in efficiency,power density,reliability,and lifetime.Thus,it earns a broader application prospect in the aero power system.However,the TSMC often suffers from instability due to the underdamped oscillation of the input filter.In this paper,the influence of the output filter as well as the output voltage close-loop control upon the system stability is discussed.And a novel active damping algorithm based on the derivative feedforward of the input voltage is proposed to improve the system stability.Experiments verified the feasibility and validity of the proposed algorithm with both fixed and variable input frequencies.
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2016, Vol. 31 
