Photo-voltaic system with battery employing parallel converters operation for charging stations and distributed loads amidst anomalous grid

• Implementation and validation of proposed topology functions as a PEV charging station with coordinated control using parallel voltage source converters (VSC_B and VSC_PV), ensuring power supply to both local loads and the grid. • The elaborate control discussed in this paper aims to generate precise reference grid currents in grid interface mode during abnormal grid circumstances, while grid voltages experience an unbalanced and negative sequence fifth and positive sequence seventh order harmonic components. • VSC_PV controller maintains unity power factor and sinusoidal currents at the point of common coupling (PCC), while VSC_B controller supports grid power and compensates for reactive power and harmonics due to nonlinear loads amidst grid uncertainties. • The system's adaptability is demonstrated through DC link controllers accurately maintaining reference voltage under dynamic conditions, and H-FLL (Hybrid Frequency Locked Loop) control structure ensures precise extraction of fundamental components, leading to sinusoidal grid currents and effective power quality management. • To enhance control aspects a comparative analysis of control approach under perturbations is carried out. In this work, solar photovoltaic array-based generation unit is connected to non-ideal distribution network and powering plug-in electric vehicle (PEV) charging infrastructure and other local loads connected to AC common bus while ensuring reliable operation of parallel connected voltage source converters under dynamics. A photovoltaic array connected via voltage source inverter, which feeds power to loads and battery is used to act as power management entity and provides reactive power and harmonic power support via converter. In context of widespread incorporation of PEVs and renewable energy sources (RES) into grid, inherent intermittency and dynamic behavior pose significant challenges in establishing a resilient and flexible control framework. Consequently, a solution is proposed that employs dual low pass filter integrated along an adaptive noise elimination filtering algorithm, serving as a primary processing stage. Additionally, integrator-based frequency locked loop control strategy is implemented in conjunction to mitigate power quality concerns, regulate voltage levels, and correct power factor discrepancies. Furthermore, system ensures continuous operation, providing uninterrupted power to local loads even during fluctuating conditions while simultaneously functioning as a seamless PEV charging station. Additionally, a comparative analysis of controller performance is summarized in a tabular format, alongside a power quality assessment. The analysis includes the evaluation of total harmonic distortion (THD) for both grid currents and grid voltages, which are measured at 2.36 % and 3.60 %, respectively. These values are well within the limits established by IEEE 519 standard, demonstrating compliance with the required power quality criteria. This RES based charging structure topology is tested using a hardware prototype under dynamics and impactful performance is observed through obtained results.