Dynamic demand response solution for industrial customers

Electric demand side management (DSM) focuses on changing the electricity consumption patterns of end-use customers through improving energy efficiency and optimizing allocation of power. Demand response (DR) is a DSM solution that targets residential, commercial and industrial customers, and is developed for demand reduction or demand shifting at a specific time for a specific duration. In the absence of on-site generation or possibility of demand shifting, consumption level needs to be lowered. Whereas non-criticality of loads at the residential and commercial levels allows for demand reduction with relative ease, reducing the demand of industrial processes requires a more sophisticated solution. Production constraints, inventory constraints, maintenance schedules and crew management are some of the many factors that have to be taken into account before one or more processes can be temporarily shut down. Some of these constraints can be viewed along the overall performance of the system, while others need to be analyzed and evaluated in real-time. A system is proposed in this paper that dynamically ranks loads and workstations within an industrial site as candidates for demand reduction. Constraints on the daily operation of the industrial system are taken into account in conjunction with real-time assessment of inventory buildup. A fuzzy/expert-based system combined with an optimization module verifies whether and, if applicable, by how much the plant can participate in a utility-initiated DR event, while satisfying its local operational constraints. A case study is proposed for a sample production line to further explain the design concepts.