Abb Schweiz Ag

Leonardo Serpa

Srinivas Ponnaluri

Johann Kolar

Simon Douglas Round

Johann Walter Kolar

A method is disclosed for the operation of a converter circuit, wherein the converter circuit has a converter unit having a multiplicity of actuatable power semiconductor switches and an LCL filter which is connected to each phase connection of the converter unit, in which the actuatable power semiconductor switches are actuated by means of an actuation signal (S) formed from a hysteresis active power value (d), from a hysteresis reactive power value (d) and from a selected flux sector (&#x3b8;). The hysteresis active power value (d) is formed from a differential active power value (P). In addition, the hysteresis reactive power value (d) is formed from a differential reactive power value (Q). An apparatus for carrying out the method is also disclosed.

Method for operating a converter circuit and apparatus for implementing the method

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 (&#x394;i) by means of a hysteresis regulator, and the difference-phase connection current vector (&#x394;i) is formed from the subtraction of a phase connection current vector (i) from a reference phase connection current vector (i), with the reference phase connection current vector (i) being formed from a difference power value (P), a difference wattless-component value (Q) and a phase flux vector (&#x3c8;). In order to very largely stabilize the switching frequency of the controllable power semiconductor switches, a current correction value (i) is additionally subtracted in order to form the difference-phase connection current vector (&#x394;i), with the current correction value (i) being formed by integration of a phase connection voltage mean value (u), and the phase connection voltage mean value (u) being formed by determining the arithmetic mean value of the phase connection voltages (u) 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.

Method for operating a converter circuit, and device for carrying out the method

A method is disclosed for operating a converter circuit, with the converter circuit having a converter unit with a plurality of drivable power semiconductor switches and an LCL filter connected to each phase connection of the converter unit, in which the drivable power semiconductor switches are driven by means of a drive signal which is formed from a hysteresis power value, from a hysteresis wattless-component value and from a selected flux sector. An apparatus for carrying out the method is also disclosed.

Growing community of inventors

Zurich, Switzerland

Leonardo Serpa