What is an example of a facility type included in the bulk-power system under the Energy Policy Act of 2005?

The correct answer highlights the vital role of control systems that are essential for the operation of an interconnected network, which is a core component of the bulk-power system as defined under the Energy Policy Act of 2005. These control systems manage the operation of various elements of the grid, ensuring stability, reliability, and efficiency in the delivery of electricity across the bulk power network. They facilitate coordination among different generation and transmission facilities, helping to respond to real-time changes in supply and demand, thus maintaining the integrity of the power system.

Understanding this context underscores the importance of these control systems within the broader definition of the bulk-power system, as they enable the interconnected operation of different facilities and serve critical functions necessary for grid management and reliability. In contrast, while bulk generation facilities are significant, they are just one part of the interconnected infrastructure that includes both generation and transmission capabilities. Electric distribution systems and residential power systems fall outside the definition of the bulk-power system, which predominantly focuses on high-voltage transmission and generation capabilities essential for large-scale electricity delivery.