reactivepowercapable

Reactivepowercapable is a term used to describe the property of a device or system to exchange reactive power with the electrical grid. Reactive power, measured in volt-ampere reactive (VAR) or megavolt-ampere reactive (MVAR), does not perform real work but is essential for maintaining voltage levels, improving power factor, and ensuring stability in alternating current networks.

A component that is reactivepowercapable can both supply and absorb reactive power within defined limits; its capability depends on voltage, current, thermal limits, and control strategies. The available Q range, commonly expressed as Qmin to Qmax, is determined by equipment design and protection settings.

Examples include synchronous generators with adjustable excitation, synchronous condensers, shunt capacitor banks, reactors, and grid-support devices such as static VAR compensators (SVC) and static synchronous compensators (STATCOM). Modern power electronics inverters used in wind and solar plants can also provide reactive power as a grid-support function when configured accordingly.

Reactivepowercapable devices are controlled to participate in voltage control and system stability. Automatic voltage regulators, governor actions, and grid codes define when and how much reactive power is provided. The rapid dynamic response and ramp rates of these devices influence their effectiveness during contingencies.

Utilizing reactivepowercapability offers voltage support, loss reduction, and improved capacity for power transfer. However, it can increase thermal losses, place additional stress on equipment, and require careful protection coordination and monitoring to avoid adverse interactions with active power flows.