Grid-Feeding Inverter With Simplified Virtual Synchronous Compensator Providing Grid Services and Grid Support

This paper proposes the enhancement of the control of a grid-connected inverter by a simplified virtual synchronous compensator (S-VSC) model working in parallel with the traditional inverter current control loops. The goal of the integration of this model into the inverter control scheme is to provide grid services, such as virtual inertia behavior, current harmonic compensation, as well as reactive grid support during faults. The S-VSC is only in charge of providing the aforementioned services, working, therefore, always at a low power level. On the other hand, the main power references are sent directly to the inverter control loops. This way, a more stable and damped operation of the inverter is obtained. The proposed structure has been implemented on a 15 kVA grid-connected inverter for experimental validation.

Automated summary

This paper proposes enhancing the control of a grid-connected inverter through a simplified virtual synchronous compensator (S-VSC) model, which provides virtual inertia behavior, current harmonic compensation, and reactive grid support during faults. The S-VSC operates at a low power level, while the main power references are sent directly to the inverter control loops, resulting in a more stable and damped operation of the inverter. The proposed structure has been experimentally validated on a 15 kVA grid-connected inverter.