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International Journal of Power System Operation and Energy Management

Abstract

Distributed Generation (DG) System is a small scale electric power generation at or near the user’s facility as opposed to the normal mode of centralized power generation. In order to ensure safe and reliable operation of power system based on DS, grid synchronization algorithm plays a very important role. This paper presents a novel Double Synchronous Reference Frame (DSRF) PLL (based on synthesis circuit) for grid connected inverter system under grid disturbances. Due to flexible in characteristics, DSRF PLL can accurately detect the phase irrespective of the grid conditions. Further, it demonstrates how the PLLs track the phase angle during some of the major abnormal grid conditions like voltage unbalance, line to ground fault and voltage sag etc.

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