Abstract
To meet the excess power, the grid integrated solar with power converter interfaces are gaining its popularity. The excess application of non-linear devices increases the power quality (PQ) problems in the distribution sectors. To resolve the alarming problems, dynamic strategy based active power filters (APFs) are gaining interest. This study deals with a robust dynamic sliding mode control (DSMC) method for the undertaken system with the application of combined non-linear and unbalanced load. In this study, an incremental conductance (IC) based maximum power point (MPP) technique and integral switching gain (ISG) based dynamic sliding surface (DSS) is proposed for regulating the boost converter and inverter respectively. To improve the PQ by reducing harmonics, a novel sliding surface (NSS) is constructed with the first derivative of the disturbing current signals sensed from the load. The DSMC design reduces the multiple controller requirement and restrict to only one PI for the voltage regulation. To justify the effectiveness of the proposed approach, different operating conditions are developed and simulated through MATLAB/Simulink software. By using DSMC, the average PQ of the system is improved to 90% and 87% at DSMC-S-APF, and 92% and 94% at DSMC-APF during both grid supplying and absorbing condition.
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