The study focuses on the integration of proton exchange membrane (PEM) electrolyzers into electric grids to enhance flexibility and efficiency. By utilizing excess renewable energy for hydrogen production, PEM electrolyzers offer a solution to grid instability and energy curtailment. Researchers developed a dispatch strategy considering the electrolyzer's performance factors like part-load efficiency and auxiliary power consumption. Results show that the optimized strategy reduces total operating costs by up to 2.6% compared to scenarios without the electrolyzer. It also improves wind energy utilization and hydrogen production efficiency. Sensitivity analysis indicates economic benefits even with varying coal and hydrogen prices. This study provides a robust framework for maximizing grid performance with PEM electrolyzers, offering insights for regions with high renewable energy penetration. By accurately modeling electrolyzer performance and integrating it into dispatch strategies, grid flexibility can be enhanced, costs reduced, and renewable energy utilization increased.