Which type of reactive resource includes generators and static VAR compensators?

The correct answer identifies dynamic reactive resources, which encompass generators and static VAR compensators, because they actively respond to changes in system conditions. Dynamic reactive resources are essential for maintaining voltage stability and providing real-time support to the electrical grid.

Generators, particularly synchronous generators, can adjust their reactive power output based on system demands, making them dynamic. Similarly, static VAR compensators (SVCs) are designed to rapidly provide or absorb reactive power in response to voltage fluctuations, thereby stabilizing the grid.

In contrast to dynamic resources, static resources do not change their output in response to real-time system conditions, while inertial resources refer to the physical inertia provided by rotating machinery in the system. Passive devices do not have the capability to provide dynamic response to system changes, as they typically rely on the existing reactive power profile of the network rather than actively controlling it. This makes dynamic reactive resources essential in modern power systems for their ability to enhance stability and reliability.