Comparative Analysis of Three-Phase PV Grid Connected Inverter Current Control Schemes in Unbalanced Grid Conditions

Recently, the regulation of photovoltaic inverters, effectively under imbalanced voltages on grid, has been crucial for operation grid-connected solar systems. In this regard, determining output current reference is an integral aspect managing a inverter with unbalanced voltage. Based evaluations Instantaneous Active-reactive Control (IARC), Positive Negative Sequence (PNSC), Balanced (BPSC), and Average (AARC), paper proposes novel variable-current-t-reference calculation method minimizing power fluctuations harmonics. The controller employed to regulate both constructive destructive sequences inside static framework, therefore enhancing dynamic performance facilitating selection suitable controls in presence significant network defects. This study also suggests comparing four MPPT methodologies examined (fuzzy logic, only, Incremental Conductance, Perturb & Observe) maximize energy output. simulation results efficiently validate suggested computation approach that presented reference.