Incorporating elements of a sustainable and distributed generation system into a production planning model for a wafer fab

In this paper, we consider elements of a sustainable and distributed generation system for a wafer fab. Wind turbines (WTs), solar photovoltaics (PVs), a substation with grid access, and a net metering system are included in the generation system. WTs and solar PVs have the highest priority in supplying the daily electricity of the wafer fab. Surplus energy can be returned to the main grid. The objective function of the production planning formulation contains production-related costs, cost for energy from the substation, and penalty costs when a renewable energy penetration is not reached. This cost can be reduced by offering renewable surplus energy to the main grid. The obtained production plans are executed in a simulation environment to compute the expected profit in the face of machine breakdowns, wind power volatility, and uncertain power output of the solar PVs. The approach allows determining an appropriate number of WTs and solar PVs for given demand scenarios. We present results of simulation experiments with the proposed model.