Method and systems for operating a wind turbine

A method for controlling operation of a wind turbine included within a power generation and delivery system, the wind turbine comprising a rotor comprising a plurality of rotor blades, an electrical generator, a power converter, and a controller, said method comprising:

• measuring at least one operating condition of the power generation and delivery system, the operating condition including a phase locked loop (PLL) error that is dependent upon an occurrence of a grid contingency event;
• transmitting, to a power limiter system, an operating condition feedback signal that corresponds to the operating condition;
• analyzing, using the power limiter system, the operating condition feedback signal to identify an occurrence of a grid contingency event responsive to the PLL error being above a predefined level;
• generating, using the power limiter system, a power command signal corresponding to an occurrence of a grid contingency event;
• transmitting the power command signal to the controller;
• controlling operation of the power converter based at least partially on the power command signal;
• and,
• storing, in a memory, at least one variable corresponding to said at least one operating condition upon the occurrence of a grid contingency event to facilitate determining whether power generation and delivery system is operating properly.