Which of the following reactive reserve sources falls into the static reactive reserve category?

The static reactive reserve category primarily includes systems that do not rely on rotating machinery or dynamic response for their operation. A Static VAR Compensator (SVC) is a power-electronic device that can quickly provide reactive power compensation to the grid, adjusting its output based on real-time voltage conditions. Because SVCs are solid-state devices, they fall into the category of static reactive resources, which can respond rapidly to changing demand or voltage fluctuations without the inertia associated with rotating systems.

In automatic mode, the Static VAR Compensator can swiftly alter its operation to either absorb or supply reactive power, thus maintaining grid stability and optimizing voltage levels. This rapid adjustment capability highlights the primary characteristic of static resources, distinguishing them from other options that rely on mechanical responses or are less flexible in their operation. Understanding this distinction helps clarify why the Static VAR Compensator in automatic mode is categorized as static reactive reserve.