This document summarizes a research paper that proposes using a Whale Optimization Algorithm (WOA) to optimize the control of photovoltaic (PV) systems connected to distribution networks in Egypt. The high penetration of PV systems can cause voltage issues in distribution grids. The paper aims to enhance distribution network performance by optimally designing a proportional-integral controller for PV inverters using WOA. WOA is inspired by the hunting behavior of humpback whales and is applied to minimize voltage deviations across the network. The effectiveness of the WOA-designed controller is evaluated through simulations and compared to controllers designed using genetic algorithms.