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A "genco" is a wholesale energy producer. Gencos submit asks to the wholesale market for future production commitments. If their asks clear, then they are committed to produce power the indicated level during the committed timeslot.

The original genco model is really a simple prototype, and not based on any realistic data. Ideally, the genco model would generate a supply curve that models real-world congestion pricing for a single load node. The form of the supply curve can presumably be derived from real world data.

This figure shows (1) in red, the nominal supply curve generated by the current genco implementation, and (2) in green, a piecewise-linear supply curve assuming that we decide to use a quadratic model for the supply curve of the form price = .0023q^2 + .025q + 15.