Abstract

This paper presents a study to reduce the positive feedback gain in Anti-islanding detection methods based on frequency positive feedback. The main idea is to reduce the injection of disturbances at the point of common coupling (PCC) during the grid-connected operation. This proposal refers to the closed-loop frequency adjustment of the synchronization algorithm PLL (Phase Locked Loop). Firstly, is presented the anti-islanding method used in this work and introduced the controller design of the PLL algorithm for islanding detection. In order to evaluate the paper, simulation and experimental results are shown to support these statements.

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