IEEE Educational Events

Abstract: Storage has been poised as a resource that would bring forth a large stream of benefits to system operations, including boosted economic efficiency, the ability to provide ancillary services, and in general promote the integration of variable renewable energy sources. Being energy limited resources, storage operation relies on charging when the system is lightly loaded or stressed (e.g., net demand valleys), and discharging when the system is heavily loaded or stressed (e.g., during peak demand periods). Such strategy reduces the magnitude of the net demand peak that must be matched by conventional generation. Consequently, the number of conventional resources during those periods is lower, and this effectively reduces redundancy from the supply side, and the likelihood and magnitude of outages resulting in power balance violations increase. This presentation shows, via numerical results, how storage can increase operating risk and how revisiting reserve requirements could mitigate risk.