A Review of Recent Control Trchniques of Virtual Synchronous Machine for Renewable Energy

Increased distributed generation (DG) integration into power system via power electronic devices results in a reduction in the total equivalent inertia of power grid utility, which lead to serve frequency stability and performance degradation of the power system. To facilitate the penetration of DG into the power grid utility, improved control schemes of the power electronics converter based DG are required to improve the system stability when it is dominated by DG based inverter. A virtual synchronous generator (VSG ) approach is suggested, which consists in controlling the static power converter to mimic the essential dynamic behavior of the conventional synchronous generator.

The main objective of this paper is to review the most recent topologies of virtual inertia control. Along this work, a detail description of each topology is presented. In addition, VSG control equations given voltage and frequency control is explained in detail. The VSG problems and future research on VSG control are discussed.