Detailed analysis of generator emulation control impedance network of microgrid inverters

Abstract

Microgrids are self contained, small-scale versions of the centralized electric power system, where power is produced, transmitted, consumed, and managed locally. They can operate as part of a host electrical power system (grid tie) or as stand alone when the main power grid is not available. Achieving a smooth mode transition from grid tie to standalone operation is an important aspect of microgrid operation. The concept of Generator Emulation Control (GEC) has already been proposed as a suitable control strategy for inverters, which offers a seamless and fast transient response especially during mode changes. This paper will present a detailed analysis of the GEC control scheme.