Comparative Performance Evaluation of PLL Algorithms dSPACE Based for Grid-Connected Single-Phase Converters

Resumen: To obtain optimum performance from renewable sources interconnected to the AC electrical network, it is necessary to have adequate monitoring and synchronization with the AC mains. In equipment based on power electronics, the grid synchronization has been achieved by Phase Locked Loops (PLL) algorithms, in order to ensure stable operation. The aim of this paper is to compare the performance of three PLL algorithms under different disturbances: second-order PLL, Fourier-based PLL, and Inverse Park Transformation (IPT) PLL. This study is carried out using a dSPACE platform where PLL models are implemented in the Simulink interface. The parameters considered in the comparison are the settling time, the performance before a smooth frequency variation and interrupt disable. These comparisons show that PLL IPT has the worst performance before an input interruption occurs. PLL based on second order generalized integrator (SOGI) has the shortest settling time and the PLL Fourier performance is quite similar to the former in settling time and when a smooth frequency variation is applied. These results provide a guide to choose the best PLL structure for any applications related to interconnected single-phase power converters, and considerations to be taken into account.

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D.S. Martínez-Padrón, V. Cárdenas, R. Alvarez-Salas, A. Tobias & A. Rivera. Comparative Performance Evaluation of PLL Algorithms dSPACE Based for Grid-Connected Single-Phase Converters. Memorias del Congreso Nacional de Control Automático, pp. 169-175, 2019.

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Sistemas Electrónicos de Potencia

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