Photovoltaic (PV) systems are the emerging clean power generation and eco-friendly sources. However, the quality of power is notably worsened due to high switching loads that have been connected to grid-tied PV systems. The nonlinear loads (Power electronics circuits), change in irradiation level, and high impedance faults are the causes of power quality issues. This article proposes an adaptive inter-coupled generalized integrator and fuzzy logic gain extraction-based PID controller (FLPID-ICGI-FLL) control scheme for the grid-tied inverter in PV applications. Moreover, the PV system’s feed-forward constituent is combined in the FLPID-ICGI-FLL for adapting the variations associated with the PV irradiation levels. The proposed FLPID-ICGI-FLL controller accommodates the variations in the grid, PV irradiation level, dynamic dc-link voltage, and load to evaluate the PWM pulses for the grid-tied inverter. The proposed FLPID-ICGI-FLL is executed in MATLAB and Simulink under the grid and load dynamic conditions. The simulation outcomes are validated on prototype experimental setup using dSPACE. Moreover, the comparative study is also analyzed to present the efficacy of the FLPID-ICGI-FLL control scheme. Finally, the operation of the proposed FLPID-ICGI-FLL controller is found good and the power quality of the grid currents is improved within the IEEE-519 standard limits.

光伏（PV）系统是新兴的清洁发电和环保能源。然而，由于连接到并网光伏系统的高开关负载，电力质量显着恶化。非线性负载（电力电子电路）、辐照水平的变化和高阻抗故障是电能质量问题的原因。本文提出了一种适用于光伏应用中并网逆变器的自适应互耦广义积分器和基于模糊逻辑增益提取的 PID 控制器 (FLPID-ICGI-FLL) 控制方案。此外，PV 系统的前馈成分被组合在 FLPID-ICGI-FLL 中，以适应与 PV 辐照水平相关的变化。所提出的 FLPID-ICGI-FLL 控制器可适应电网、PV 辐照水平、动态直流母线电压和负载的变化，以评估并网逆变器的 PWM 脉冲。所提出的 FLPID-ICGI-FLL 在电网和负载动态条件下在 MATLAB 和 Simulink 中执行。使用 dSPACE 在原型实验装置上验证了仿真结果。此外，还分析了比较研究以展示 FLPID-ICGI-FLL 控制方案的有效性。最后，发现所提出的 FLPID-ICGI-FLL 控制器运行良好，并且电网电流的电能质量在 IEEE-519 标准限制内得到改善。