System and method for detecting a grid event

A system and method for detecting a grid event is provided. The method includes sampling 502 grid voltage and grid current over a fixed period of time; determining 504 grid impedance at one or more frequencies using the sampled grid voltage and the sampled grid current; comparing 506 the grid impedance at the one or more frequencies to a known expected grid impedance at the one or more frequencies; and detecting 508 a grid event based on the comparison.