Power factor correction is a term in electrical engineering that refers to a technology used to improve the ratio between the active power and the reactive power in a circuit. However, there are different phrases, terms, and words that can be used interchangeably with the term power factor correction. Some of these synonyms include reactive power compensation, power quality enhancement, power factor improvement, harmonic filtering, and voltage stabilization. In essence, all these expressions refer to the same concept of optimizing electricity usage by reducing wastage and inefficiency within electrical systems. Consequently, whether you hear power factor correction or any of its synonymous terms, the underlying principle is the same.