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This study presents the performance, evaluation and development of the controller for the grid-connected photovoltaic (PV) system, with a focus on its response during voltage disturbances. As PV systems become integral to modern power grids, ensuring stability and reliable performance under fluctuating voltage conditions is critical. The proposed controller is designed to manage grid interactions and enhance resilience against various voltage disturbances. A series of simulations were conducted to assess the controller's performance under both balanced and unbalanced voltage disturbance scenarios. Results indicate that the controller effectively maintains stability during balanced voltage disturbances, displaying robust control and minimal fluctuation in power output. However, performance is moderately reduced under unbalanced disturbances, highlighting areas for potential improvement. These findings underscore the importance of tailored control strategies for grid-connected PV systems to support grid stability amidst varying disturbance conditions.

photovoltaic system; grid-connected; voltage disturbance; converter