Design and Implementation of Grid Sequence Separator Based Control for Single-Phase Microgrid

摘要

This paper proposes a Grid Sequence Separator (GSS) based control in standalone and grid connected mode for 1-ф PV integrated battery energy storage system (BESS). The proposed model serves many functions such as reactive power compensation, power balance, harmonic removal in source current and continuity of supply power in standalone mode. Battery is connected at the DC Link through bidirectional buck-boost converter. The smooth transfer from grid connected to standalone mode (GTS) and standalone to grid connected mode (STG) is achieved through static transfer switch (STS). GSS has been designed in αβ frame which removes in-loop filters problems causing time delays thereby improving its transient performance. This makes the bandwidth of the system wider making the PLL transition control faster. It has been employed for control of shunt compensator to extract fundamental load current accurately. The absence of in-loop delays remarkably improves its performance which is validated using simulation results.