Trade off between Droop and Virtual Synchronous Control for PV Synchronous Generator

Abstract

Microgrid (MG) is emerging as a modern power system which can be operated in islanded as well as grid-connected modes. The evolution of power electronic technology in the power system gives forward direction to smart grid and microgrid. A major challenge in a microgrid is the absence of rotational inertia as distributed energy resources (DER) are interfaced with the grid through power electronic converters. Converters are operated under droop control for power-sharing conventionally. The concept of the virtual synchronous generator(VSG) can be a suitable approach for controlling these converters in low inertia microgrids. VSG implementation with a solar photovoltaic system is called photovoltaic synchronous generator. This paper discusses the trade-off between conventional droop control and VSG control of photovoltaic generation (PV).