Security-constrained Unit Commitment Considering Load Transfer of Large Industrial Consumers

Some loads of large industrial consumers can be transferred within a certain time range without affecting the overall production process. The start-up time of these loads are considered to be adjustable. In this paper, the model of security-constrained unit commitment considering load transfer of large industrial consumers is proposed by taking operation characteristics of transferable loads into account. The objective function of this model is to minimize the total cost of power generation and load transfer, and constraint of load transfer are integrated into the constraints of traditional security-constrained unit commitment model. Therefore, the model is a mixed integer linear programming formulation, and a commercial solver is used to solve it. In the end, the results of case study show that the coordinated optimization of unit commitment and transferable loads can decrease the system load difference between peak and valley and reduce the total cost of system operation, which shows that the proposed model and method are effective.