Study on SVG Reactive Power Compensation Based on Sliding Mode Variable Structure and Internal Model Control

Aiming at the problem that the static reactive power generator (SVG) is unstable and the reactive power compensation effect is not obvious when the load is abrupt, a SVG reactive power compensation control method based on sliding mode variable structure internal model control is proposed. The method combines the advantages of sliding mode variable structure control and internal mode control. The sliding mode variable structure control is adopted for the DC side capacitor voltage to ensure the stability of the DC side capacitor voltage during the operation of the SVG. The internal mode control is used to achieve the accurate tracking performance of the signal. The simulation results verify the feasibility and effectiveness of the proposed control method and have certain engineering practicability.