| 摘要 |
A method for operating a converter circuit is specified with the converter circuit having a converter unit with a multiplicity of controllable power semiconductor switches and having an energy storage circuit formed by two series-connected capacitors, in which the controllable power semiconductor switches are controlled by means of a control signal formed from a hysteresis signal vector (x), and the hysteresis signal vector (x) is formed from a difference-phase connection current vector (Deltai<SUB>fi,i</SUB>) by means of a hysteresis regulator, and the difference-phase connection current vector (Deltai<SUB>fi,i</SUB>) is formed from the subtraction of a phase connection current vector (i<SUB>fi,i</SUB>) from a reference phase connection current vector (i<SUB>fi,i,ref</SUB>), with the reference phase connection current vector (i<SUB>fi,i,ref</SUB>) being formed from a difference power value (P<SUB>diff</SUB>), a difference wattless-component value (Q<SUB>diff</SUB>) and a phase flux vector (psi<SUB>g,alphabeta</SUB>). In order to very largely stabilize the switching frequency of the controllable power semiconductor switches, a current correction value (i<SUB>0</SUB>) is additionally subtracted in order to form the difference-phase connection current vector (Deltai<SUB>fi,i</SUB>), with the current correction value (i<SUB>0</SUB>) being formed by integration of a phase connection voltage mean value (u<SUB>inv,A</SUB>), and the phase connection voltage mean value (u<SUB>inv,A</SUB>) being formed by determining the arithmetic mean value of the phase connection voltages (u<SUB>inv,iM</SUB>) with the reference point of the connection point of the capacitors in the energy storage circuit. A device is also specified, by means of which the method can be carried out in a particularly simple manner.
|
