Implementation of Demand Response Programs on Unit Commitment Problem

Peak electrical demand usually occurs in hot weather conditions due to the synchronous connection of the air-conditioners to local power grids. Hence, if a demand-side management (DSM) strategy is not applied on consumption patterns of customers, load-generation imbalance may lead to voltage collapse, cascaded outages, and catastrophic blackouts. This chapter presents a mathematical model for application of time-amount-based DSM program on a cost-based unit commitment problem in order to minimize the energy procurement cost. The ramp down/up rate limit, start-up and shutdown costs, generation capacity, minimum up- and downtimes, minimum and maximum time-dependent operating limits, and power balance criterion are considered as constraints. Simulations are conducted on a 10-unit test system and solved as a mixed integer nonlinear problem under general algebraic mathematical modeling system to find the optimum operating point of thermal units without and with implementation of a DSM strategic program.

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