  The active and reactive power controllers of grid-forming converters are
traditionally designed separately, which relies on the assumption of loop
decoupling. This paper proposes a full-state feedback control for the power
loops of grid-forming converters. First, the power loops are modeled
considering their natural coupling, which, therefore, can apply to all kinds of
line impedance, i.e., resistive, inductive, or complex. Then a full-state
feedback control design is used. By this way, the eigenvalues of the system can
be arbitrarily placed to any positions in the timescale of power loops.
Therefore, the parameters can be directly chosen by the predefined
specifications. A step-by-step parameters design procedure is also given in
this paper. Experimental results verify the proposed method.
