A self-power generation scheduling model under load demand and uncertainty of a by-product of gas production in enterprises microgrid

Scheduling of the self-generation plants is very helpful to the energy saving and emission reduction for enterprises microgrid. In this paper, the objective function was to minimize the overall cost of the electricity. The scenario tree was used to analyze the uncertainties of electricity load and gas supplication. The self-generation stochastic model was built. In this model, rectangle set was used to describe the safety constraint. In order to avoid that rectangle set is too conservative, we used ellipsoid set instead of rectangle set by adjusting risk parameter. State transition diagram of gas holder level was given to transform safety constraint into linear constraint. Results show that during off-peak periods, most of the enterprises load is afforded by the grid; and that during peak periods, most of load is afforded by the self-generation plants. In addition, using ellipsoid set instead of rectangle set reduces decision conservatism by adjusting the risk coefficient.