Impedance compensation

Method for operating a power converter having an output for feeding a load current into a grid, including the steps of a) determining the load current at the output of the power converter, b) monitoring an output voltage of the power converter;

• c) controlling the load current to avoid that the output voltage exceeds an output voltage limit, wherein controlling the load current includes the step of defining a limiting characteristics of the load current in dependency of the output voltage, the limiting characteristics i) being equal to a nominal load current, below a first output voltage level, ii) having a negative gradient between the first output voltage level and a second output voltage level, iii) covering a load current value range between zero and the nominal load current and iv) being zero above the second output voltage level, v) wherein the first output voltage level is smaller than the second output voltage level and vi) the second output voltage level being equal or smaller than a maximum output voltage.

A power converter having an output for connecting to a grid, including an output current sensor, an output voltage sensor and an output current controller, where the power converter is configured to feed an output current into a grid by:

• a) determining the output current of the power converter, b) monitoring the output voltage of the power converter, a) controlling the output current in order to prevent the output voltage from exceeding an output voltage limit, wherein controlling the output current includes the step of defining a limiting characteristics of the output current in dependency of the output voltage, i) the limiting characteristics being equal to a nominal output current, below a first output voltage level, ii) having a negative gradient between the first output voltage level and a second output voltage level, iii) covering an output current value range between zero and the nominal output current and iv) being zero above the second output voltage level, v) wherein the first output voltage level is smaller than the second output voltage level and vi) the second output voltage level being equal or smaller than a maximum output voltage.

Method for operating a power converter having an output for feeding a load current into a grid, including the steps of a) determining the load current at the output of the power converter, b) monitoring an output voltage of the power converter, c) controlling the load current, to avoid that the output voltage exceeds a voltage limit, wherein controlling the load current includes the step of defining a limiting characteristics of the load current in dependency of the output voltage, the limiting characteristics i) being equal to a nominal load current, below a first output voltage level, ii) having a negative gradient between the first output voltage level and a second output voltage level, iii) covering a load current value range between zero and the nominal load current, iv) being zero above the second output voltage level, v) wherein the first output voltage level being smaller than the second output voltage level, vi) the second output voltage level being equal or smaller than the maximum output voltage.