Grid forming control of grid connected power converter

A computer-readable medium comprising instructions which, when the instructions are executed by a computer, cause the computer to perform an operation for controlling a grid connected power converter configured to supply power to a grid from a power source, the operation comprising:

• determining a grid voltage reference for controlling the power converter;
• controlling a first power component being supplied to the grid by the power converter by controlling the power converter using a first grid forming controller configured to control the output voltage towards the grid voltage reference, the first grid forming controller operating according to a first grid forming algorithm being configured to output a first voltage component for supplying the first power component to the grid;
• controlling a second power or voltage component being supplied to the grid by the power converter by controlling the power converter using a second grid forming controller, operating in parallel to the first grid forming controller, the second grid forming controller operating according to a second grid forming algorithm being configured to output a second voltage component for supplying the second power or voltage component to the grid;
• combining the second output voltage component of the second grid forming algorithm with the first output voltage component of the first grid forming algorithm;
• and
• operating the power converter according to the combined output voltage from the first grid forming controller and the second grid forming controller.

A wind power installation control system, comprising:

• a rotor;
• an electrical generator driven by the rotor;
• and
• a power converter configured to supply power to a grid;
• wherein the wind power installation control system is configured to perform an operation, comprising:
• determining a grid voltage reference for controlling the power converter;
• controlling a first power component being supplied to the grid by the power converter by controlling the power converter using a first grid forming controller configured to control the output voltage towards the grid voltage reference, the first grid forming controller operating according to a first grid forming algorithm being configured to output a first voltage component for supplying the first power component to the grid;
• controlling a second power or voltage component being supplied to the grid by the power converter by controlling the power converter using a second grid forming controller, operating in parallel to the first grid forming controller, the second grid forming controller operating according to a second grid forming algorithm being configured to output a second voltage component for supplying the second power or voltage component to the grid;
• combining the second output voltage component of the second grid forming algorithm with the first output voltage component of the first grid forming algorithm;
• and
• operating the power converter according to the combined output voltage from the first grid forming controller and the second grid forming controller.