Briefly, embodiments are directed to a system, method, and article for generating a power system load model of a power system. Power grid disturbance data may be accessed. A power system simulation engine may be prepared, wherein the simulation engine may implement the power system model of the power system. A parameter subset A may be identified from a knowledge-based approach. The parameter subset B may be identified based on a special grid event type based on the power grid disturbance data. A final parameter subset may be selectively determined based on parameter subsets A and B using a decision-making approach. At least one parameter of the final parameter subset may be tuned. One or more parameters of the power system load model may be modified based on the tuning.