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A three-phase phase-locked loop algorithm with immunity to distorted signals employing an adaptive filter

2019; Elsevier BV; Volume: 170; Linguagem: Inglês

10.1016/j.epsr.2019.01.017

1873-2046

Francisco Kleber de A. Lima, Renato Guerreiro Araújo, Fernando Lessa Tofoli, Carlos Gustavo C. Branco,

Advancements in PLL and VCO Technologies

This paper introduces a synchronization algorithm for the detection of the fundamental positive-sequence component in three-phase systems. The structure is based on the correlation of the input signal with a complex signal generated from the association of an adaptive filter and a phase-locked loop (PLL) method previously presented in literature. Good disturbance rejection is then achieved, in particular to interharmonics and subharmonics. Simulation and experimental results are presented and discussed in order to demonstrate the performance of the proposed solution when compared with that regarding dual second-order generalized integrator frequency locked loop (DSOGI-FLL), which is often considered to present good disturbance rejection.