Photovoltaic (PV) power systems are integrated with high penetration levels into the grid. This in turn encourages several modifications for grid codes to sustain grid stability and resilience. Recently, constant power management and regulation is a very common approach, which is used to limit the PV power production. Thus, this article proposes dual-mode power generation algorithm for grid-connected PV systems. The developed system considers the two-stage PV configuration for implementation, where the dual-mode power generation technique is executed within the DC–DC conversion (boost) stage. Most of the techniques adopted for dual-mode power operation employ the conventional perturb and observe method, which is known with unsatisfactory performance at fast-changing atmospheric conditions. Considering this issue, this study suggests a modified maximum power point tracker for power extraction. Furthermore, a new adaptive DC-link controller is developed to improve the DC-link voltage profile at different operating conditions. The adaptive DC-link controller is compared with the traditional PI controller for voltage regulation. The inverter control is accomplished using finite-set model predictive control with two control objectives, namely reference current tracking and switching frequency minimization. The overall control methodology is evaluated at different atmospheric and operating conditions using MATLAB/Simulink software.

光伏 (PV) 电力系统以高渗透率集成到电网中。这反过来又鼓励对电网规范进行多次修改，以维持电网的稳定性和弹性。最近，恒定功率管理和调节是一种非常普遍的方法，用于限制光伏发电。因此，本文提出并网光伏系统的双模发电算法。开发的系统考虑实施两级光伏配置，其中双模式发电技术在 DC-DC 转换（升压）级内执行。双模功率运行所采用的技术大多采用传统的扰动观察方法，在快速变化的大气条件下性能不佳。考虑到这个问题，这项研究提出了一种改进的最大功率点跟踪器，用于功率提取。此外，开发了一种新的自适应直流母线控制器，以改善不同运行条件下的直流母线电压分布。自适应直流母线控制器与传统的 PI 控制器进行电压调节比较。逆变器控制是使用具有两个控制目标的有限集模型预测控制完成的，即参考电流跟踪和开关频率最小化。使用 MATLAB/Simulink 软件在不同的大气和操作条件下评估整体控制方法。自适应直流母线控制器与传统的 PI 控制器进行电压调节比较。逆变器控制是使用具有两个控制目标的有限集模型预测控制完成的，即参考电流跟踪和开关频率最小化。使用 MATLAB/Simulink 软件在不同的大气和操作条件下评估整体控制方法。自适应直流母线控制器与传统的 PI 控制器进行电压调节比较。逆变器控制是使用具有两个控制目标的有限集模型预测控制完成的，即参考电流跟踪和开关频率最小化。使用 MATLAB/Simulink 软件在不同的大气和操作条件下评估整体控制方法。