Multifunctional PV-Based EV System Under Distorted Grid Condition Using Modified-STF

In this paper, we analyse the performance of a multifunctional PV-based EV system under distorted grid condition. In this work, a Modified Self Tuning Filter (MSTF) is proposed to improve the power quality. The control scheme adapted makes the PV-based EV system multifunctional as it extracts maximum solar power, which is then used to charge the EV battery at rated power and also supply power to the non linear load. The additional extracted PV power is then injected into the grid. The load current harmonics are mitigated to maintain sinusoidal grid current. The sinusoidal grid current obtained is in phase with the PCC voltage to ensure unity power factor operation. The grid current settles to a THD value, well under the limits of grid codes specified by IEEE 519. The proposed scheme is analysed under steady-state as well as in dynamic conditions in MATLAB. The results obtained validate the efficiency of the proposed MSTF-PI control in improving the power quality.