In electrical systems, what does a capacitor do with reactive power?

A capacitor in electrical systems is primarily used to provide reactive power as needed by the circuit. This capability is essential for maintaining voltage levels and improving power factor within an alternating current (AC) system.

When reactive power is required, such as in inductive loads that cause a lagging power factor, the capacitor discharges the energy it has previously stored. This action helps to support the voltage and balance the circuit's power factor by supplying the reactive power instead of relying solely on the power source. Capacitors are beneficial in ensuring that the system operates efficiently under varying load conditions.

While capacitors can store reactive power, they do so for the purpose of providing it when necessary rather than purely for storage, which distinguishes their functionality in reactive power management.