Análise de SRF-PLL e DSOGI-PLL Aplicados em um VSC Quatro Fios Conectado à Rede Elétrica com Desequilíbrio de Tensão

The three-phase four-wire VSCs voltage source converters are used to connect sustainable sources the distribution system where loads predominantly single-phase. with unbalanced neutral has unwanted negative and zero sequence components. In this condition synchronism between VSC electrical grid that is done using PLL (Phase Locked Loop) affected. SRF-PLL (Synchronous Reference Frame-PLL) popularly used, however it does not perform well in systems. DSOGI- (Dual Second Order Generalized Integrator-PLL) ensures power grid. Thus, purpose of article evaluate effect imbalance ac currents DSOGI-PLL