Regulation apparatus for a current converter, current converter arrangement and method for regulating a grid coupled current converter

Regulation apparatus for a power converter,

• wherein the regulation apparatus is configured to determine a control voltage for the power converter in dependence on an output voltage of the power converter, wherein the regulation apparatus is configured to
• limit a first coordinate of a control voltage phasor describing the control voltage to a first control range around a first coordinate of a reference voltage phasor based on the output voltage,
• limit a second coordinate of the control voltage phasor to a second control range around a second coordinate of the reference voltage phasor,
• wherein a first coordinate axis to which the first coordinates are related and a second coordinate axis to which the second coordinates are related are orthogonal to each other and rectilinear.

Regulation apparatus for a power converter,

• wherein the regulation apparatus is configured to determine a control quantity for the power converter,
• wherein the power converter comprises an intermediate circuit, wherein the power converter is configured to provide a bridge voltage indicated by the control quantity based on the control quantity and an intermediate circuit voltage of the intermediate circuit at a circuit node coupled to a terminal point of the power converter via an internal impedance of the power converter,
• wherein the regulation apparatus is configured to, for the control quantity,
• consider a contribution of a least one voltage oscillation in the intermediate circuit to the bridge voltage and/or
• consider a potential difference between a reference potential of the bridge voltage and a reference potential of the output voltage.

Method for regulating a power converter comprising:

• determining a control voltage for the power converter in dependence on an output voltage of the power converter, determining the control voltage comprising:
• limiting an amplitude of a control voltage phasor describing the control voltage to an amplitude control range around an amplitude of a reference voltage phasor based on the output voltage,
• limiting an angle of the control voltage phasor to an angle control range around an angle of the reference voltage phasor and
• adjusting the amplitude control range and the angle control range depending on the situation.

Method for regulating a power converter, comprising:

• determining a control voltage for the power converter in dependence on an output voltage of the power converter, determining the control voltage comprising:
• limiting a first coordinate of a control voltage phasor describing the control voltage to a first control range around a first coordinate of a reference voltage phasor based on the output voltage,
• limiting a second coordinate of the control voltage phasor to a second control range around a second coordinate of the reference voltage phasor,
• wherein a first coordinate axis to which the first coordinates are related and a second coordinate axis to which the second coordinates are related are orthogonal and rectilinear to each other.

Method for regulating a power converter, comprising:

• determining a control quantity for the power converter,
• providing a bridge voltage indicated by the control quantity at a circuit node coupled to a terminal point of the power converter via an internal impedance of the power converter, wherein providing takes place based on the control quantity and an intermediate circuit voltage of an intermediate circuit of the power converter,
• wherein the method comprises, for determining the control quantity
• considering a contribution of at least one voltage oscillation in the intermediate circuit to the bridge voltage and/or
• considering a potential difference between a reference potential of the bridge voltage and a reference potential of the output voltage.