J. Avila-MontesDavid Campos‐GaonaE. MelgozaJuan Ramón Rodriguez‐Rodrıguez2026-03-222026-03-22201410.1109/tie.2014.2321335https://doi.org/10.1109/tie.2014.2321335https://andeanlibrary.org/handle/123456789/45481Citaciones: 21Voltage control based on reactive power compensation is a fundamental aspect of the operation of ac electric power systems. This paper presents a novel shunt compensation scheme based on a virtual air gap variable reactor. The scheme is fully developed, from the adaptation of the virtual air gap principle to high-voltage applications and the determination of its expected performance, to the proposal of a digital cascade control using internal model and proportional-integral controllers. The suitability and flexibility of the device, and the voltage control and reactive power compensation scheme are verified by means of laboratory tests performed in a small-scale prototype. Measured results show that the proposed device and its control provide a robust load compensation scheme for ac systems.enCompensation (psychology)Scheme (mathematics)VoltageControl theory (sociology)Variable (mathematics)Air gap (plumbing)Computer scienceElectronic engineeringEngineeringControl (management)article