CONTROL PARAMETER ADJUSTER FOR SYSTEM LINK INVERTER

PURPOSE:To adjust non-interference control parameters to optimum values on-line automatically without human work. CONSTITUTION:A control circuit for a system link inverter has a non-interference controlling part 11 which outputs each axis voltage command signal by using control parameters to be determined by the resistance and reactance components of an link impedance, on the basis of the output signals of current regulators 10D and 10Q provided at each axis of 2-axis rectangular coordinates, and performs the non-interference control of effective and reactive power by controlling each axis current component independently separating them from one another in accordance with these voltage command signals. And it has a rotational matrix calculating part 14 which finds rotational matrix elements which makes a current command value vector after rotation parallel to a voltage command vector outputted from the non-interference control part 11, when the current command value is rotated by a rotational matrix on the 2-axis rectangular coordinates, and sets control parameters for the non-interference control part 11 using the above-mentioned rotational matrix elements.