Definition: Reactive Power

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Reactive Power

The portion of electricity that establishes and sustains the electric and magnetic fields of alternating-current equipment. Reactive power must be supplied to most types of magnetic equipment, such as motors and transformers. It also must supply the reactive losses on transmission facilities. Reactive power is provided by generators, synchronous condensers, or electrostatic equipment such as capacitors and directly influences electric system voltage. It is usually expressed in kilovars (kvar) or megavars (Mvar).[1]

Wikipedia Definition


Also Known As
volt-ampere reactive (var)
Related Terms
transmission lineselectricity generationtransformersystempowersmart grid
References
  1. Glossary of Terms Used in Reliability Standards


AninlineGlossary Definition