System and method for controlling a power generation system based on a detected islanding event

A method for controlling the operation of a power generation system configured to supply power to an electrical grid, the method comprising:

• detecting an occurrence of an islanding event associated with the power generation system, wherein the islanding event is caused by an opening of one or more phase conductors;
• adjusting a frequency limit applied within a phase-locked loop (PLL) regulator of the power generation system to an islanding frequency limit in response to the detection of the islanding event, wherein the islanding frequency limit exceeds a maximum frequency limit defined for the PLL regulator in the event of an occurrence of any ride-through transient event or is less than a minimum frequency limit defined for the PLL regulator in the event of the occurrence of any ride-through transient event;
• controlling a power converter of the power generation system based on a control signal generated by the PLL regulator as the power generation system is being isolated from the electrical grid, the islanding frequency limit being applied within the PLL regulator when generating the control signal;
• and
• shutting down the power generation system upon isolation of the power generation system from the electrical grid.

A power generation system, the system comprising:

• a generator;
• a power converter coupled to the generator;
• and
• a computing device configured to control the operation of the power converter, the computing device storing instructions that, when implemented by one or more processors, configure the computing device to:
• detect an occurrence of an islanding event associated with the power generation system, wherein the islanding event is caused by an opening of one or more phase conductors;
• adjust a regulator gain applied within a regulator to an islanding gain value in response to the detection of the islanding event, wherein the islanding gain value exceeds a maximum gain value defined for the regulator in the event of an occurrence of any ride-through transient event;
• control the power converter based on a control signal generated by the regulator as the power generation system is being isolated from the electrical grid, the control signal being generated within the regulator as a function of the islanding gain value;
• and
• shut down the power generation system upon isolation of the power generation system from the electrical grid.