Study on improvement of available transfer capability by Demand Side Management

Demand side management (DSM) is now an important consideration for electric power utilities. DSM in general refers to any activity adopted by an electric utility that ultimately changes the utility´s system load curve. Enhancing the DSM activities could help not only the system operate more efficiently, but also benefit the system available transfer capability (ATC). This paper presents an integrated framework for evaluating impacts of DSM on ATC. A set of load management models for peak clipping/shifting and valley filling, strategic conservation and strategic load growth are presented. Composite DSM actions in the power system´s diverse areas are also modeled. ATC evaluation procedure incorporated with DSM resources is given in sequential Monte Carlo simulation. The liner-programming based ATC calculation model and time-varying load curves are employed to calculate ATC indices. The IEEE-RTS79 is used to illustrate the proposed approach and implement comparisons of impacts with and without DSM activity on ATC indices.