A New Adaptive Phase-locked Loop for Synchronization of a Grid-Connected Voltage Source Converter: Simulation and Experimental Results

TL;DR

This paper introduces a new adaptive phase-locked loop for grid-connected converters, demonstrating its effectiveness through simulation and experimental results, ensuring reliable synchronization with minimal measurements.

Contribution

The paper presents a novel adaptive PLL design that guarantees stability and requires only local measurements, improving synchronization performance for grid-connected converters.

Findings

Excellent synchronization performance demonstrated in simulations

Successful experimental validation of the adaptive PLL

Guaranteed stability properties of the proposed scheme

Abstract

In [1] a new adaptive phase-locked loop scheme for synchronization of a grid connected voltage source converter with guaranteed (almost) global stability properties was reported. To guarantee a suitable synchronization with the angle of the three-phase grid voltage we design an adaptive observer for such a signal requiring measurements only at the point of common coupling. In this paper we present some simulation and experimental illustration of the excellent performance of the proposed solution.