Reactive power control of grid-connected inverter in vehicle-to-grid application for voltage regulation

Vehicle-to-grid is a promising concept, which has a potential to provide ancillary services to the power grid such as peak load reduction, spinning and non-spinning reserve, and voltage and frequency regulation. This paper investigates the control method of a grid-connected inverter in vehicle to grid application for voltage regulation through reactive power control. The control technique is to maintain the point of common coupling voltage at a nominal value when there is sag or swell on grid voltage. The required power is mathematically derived as a function of the balanced sag or swell factor and phase angle of compensated voltage. The proposed control technique is simulated using MATLAB Simulink and Simpower tools.